{"id":2593,"date":"2025-03-24T08:46:58","date_gmt":"2025-03-23T23:46:58","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=2593"},"modified":"2025-03-24T08:47:27","modified_gmt":"2025-03-23T23:47:27","slug":"%e3%80%90%e4%bf%9d%e5%ad%98%e7%89%88%e3%80%91laravel-find%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%ef%bc%9a8%e3%81%a4%e3%81%ae%e5%ae%9f%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=2593","title":{"rendered":"\u3010\u4fdd\u5b58\u7248\u3011Laravel find\u30e1\u30bd\u30c3\u30c9\u306e\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a8\u3064\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30b3\u30c4"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">Laravel find\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">find\u30e1\u30bd\u30c3\u30c9\u304c\u5185\u90e8\u3067\u5b9f\u884c\u3057\u3066\u3044\u308b\u3053\u3068<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">find\u30e1\u30bd\u30c3\u30c9\u3068findOrFail\u306e\u9055\u3044\u3068\u4f7f\u3044\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">Laravel find\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">\u30e1\u30a4\u30f3\u30ad\u30fc\u306b\u3088\u308b\u5358\u4e00\u30ec\u30b3\u30fc\u30c9\u306e\u53d6\u5f97<\/a>      <\/li>      <li>        <a href=\"#i-5\">\u8907\u6570\u306e\u30e1\u30a4\u30f3\u30ad\u30fc\u3092\u4f7f\u7528\u3057\u305f\u8907\u6570\u30ec\u30b3\u30fc\u30c9\u306e\u53d6\u5f97<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-6\">\u30ab\u30b9\u30bf\u30e0\u66f8\u304d\u8fbc\u307f\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u9ad8\u5ea6\u306a\u691c\u7d22<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-7\">find\u30e1\u30bd\u30c3\u30c9\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-8\">ModelNotFoundException\u306e\u9069\u5207\u306a\u51e6\u7406\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-9\">findOrFail\u3092\u4f7f\u7528\u3057\u305f\u4f8b\u5916\u51e6\u7406\u306e\u5b9f\u88c5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-10\">find\u30e1\u30bd\u30c3\u30c9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-11\">N+1\u554f\u984c\u306e\u56de\u907f\u3068Eager\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u6d3b\u7528<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-12\">\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-13\">\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u96c6<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-14\">REST API\u3067\u306efind\u30e1\u30bd\u30c3\u30c9\u306e\u6d3b\u7528\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-15\">\u8907\u96d1\u306a\u691c\u7d22\u6761\u4ef6\u3067\u306e\u4f7f\u7528\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-16\">\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u542b\u3080\u30e2\u30c7\u30eb\u306e\u691c\u7d22\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-17\">find\u30e1\u30bd\u30c3\u30c9\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u30d2\u30f3\u30c8<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-18\">\u30af\u30ea\u30fc\u30f3\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">\u30c6\u30b9\u30c8\u3057\u3084\u3059\u3044find\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">Laravel find\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<p>Laravel\u306efind\u30e1\u30bd\u30c3\u30c9\u306f\u3001Eloquent ORM\u306e\u4e2d\u3067\u6700\u3082\u57fa\u672c\u7684\u304b\u3064\u91cd\u8981\u306a\u30e1\u30bd\u30c3\u30c9\u306e1\u3064\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001find\u30e1\u30bd\u30c3\u30c9\u306e\u5185\u90e8\u52d5\u4f5c\u3068\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">find\u30e1\u30bd\u30c3\u30c9\u304c\u5185\u90e8\u3067\u5b9f\u884c\u3057\u3066\u3044\u308b\u3053\u3068<\/h3>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30e2\u30c7\u30eb\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u30fc\u30ad\u30fc\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u5358\u4e00\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u53d6\u5f97\u3059\u308b\u969b\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u5185\u90e8\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u51e6\u7406\u304c\u5b9f\u884c\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30af\u30a8\u30ea\u30d3\u30eb\u30c0\u30fc\u306e\u751f\u6210<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ find\u30e1\u30bd\u30c3\u30c9\u306e\u5185\u90e8\u5b9f\u88c5\uff08\u7c21\u7565\u5316\uff09\npublic function find($id, $columns = ['*'])\n{\n    if (is_array($id)) {\n        return $this-&gt;findMany($id, $columns);\n    }\n    return $this-&gt;whereKey($id)-&gt;first($columns);\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>SQL\u6587\u306e\u751f\u6210<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u751f\u6210\u3055\u308c\u308bSQL\u6587\u306e\u4f8b\n\/\/ SELECT * FROM users WHERE id = ? LIMIT 1<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u78ba\u8a8d\uff08\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u5834\u5408\uff09<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u30af\u30a8\u30ea\u5b9f\u884c<\/li>\n\n\n\n<li>\u30e2\u30c7\u30eb\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u751f\u6210<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">find\u30e1\u30bd\u30c3\u30c9\u3068findOrFail\u306e\u9055\u3044\u3068\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u3068findOrFail\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u5fb4\u3068\u9055\u3044\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<p><strong>find\u30e1\u30bd\u30c3\u30c9<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30ec\u30b3\u30fc\u30c9\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306fnull\u3092\u8fd4\u3059\n$user = User::find(1);\nif ($user === null) {\n    \/\/ \u30ec\u30b3\u30fc\u30c9\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306e\u51e6\u7406\n    return response()-&gt;json(['message' =&gt; '\u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093'], 404);\n}<\/pre>\n\n\n\n<p><strong>findOrFail\u30e1\u30bd\u30c3\u30c9<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">try {\n    \/\/ \u30ec\u30b3\u30fc\u30c9\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306fModelNotFoundException\u3092\u30b9\u30ed\u30fc\n    $user = User::findOrFail(1);\n} catch (ModelNotFoundException $e) {\n    \/\/ \u4f8b\u5916\u51e6\u7406\n    return response()-&gt;json(['message' =&gt; '\u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093'], 404);\n}<\/pre>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u306e\u4e3b\u306a\u7279\u5fb4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5358\u4e00\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u30fc\u30ad\u30fc\u307e\u305f\u306f\u30d7\u30e9\u30a4\u30de\u30ea\u30fc\u30ad\u30fc\u306e\u914d\u5217\u3092\u53d7\u3051\u53d6\u308c\u308b<\/li>\n\n\n\n<li>\u30ec\u30b3\u30fc\u30c9\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306fnull\u3092\u8fd4\u3059<\/li>\n\n\n\n<li>\u660e\u793a\u7684\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u304c\u5fc5\u8981<\/li>\n<\/ul>\n\n\n\n<p>findOrFail\u30e1\u30bd\u30c3\u30c9\u306e\u4e3b\u306a\u7279\u5fb4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ec\u30b3\u30fc\u30c9\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306f\u4f8b\u5916\u3092\u30b9\u30ed\u30fc<\/li>\n\n\n\n<li>try-catch\u69cb\u6587\u3067\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>RESTful API\u306b\u9069\u3057\u3066\u3044\u308b<\/li>\n<\/ul>\n\n\n\n<p>\u4e21\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u5206\u3051\uff1a<\/p>\n\n\n<div id=\"id-9ff9c72e-5c5c-431b-9e95-6294d02ff61e\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30e1\u30bd\u30c3\u30c9<\/th><th>\u4f7f\u7528\u30b7\u30fc\u30f3<\/th><th>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/th><th>\u623b\u308a\u5024<\/th><\/tr><\/thead><tbody><tr><td>find<\/td><td>\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u304c\u5fc5\u8981\u306a\u5834\u5408<\/td><td>\u660e\u793a\u7684\u306a\u6761\u4ef6\u5206\u5c90<\/td><td>Model|null<\/td><\/tr><tr><td>findOrFail<\/td><td>RESTful API\u3001\u5b58\u5728\u304c\u524d\u63d0\u306e\u5834\u5408<\/td><td>\u4f8b\u5916\u51e6\u7406<\/td><td>Model<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u4ee5\u4e0a\u304c\u3001Laravel\u306efind\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u4ed5\u7d44\u307f\u3068\u4f7f\u3044\u65b9\u3067\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u308a\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">Laravel find\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/h2>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3067\u6d3b\u7528\u3059\u308b\u305f\u3081\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u30e1\u30a4\u30f3\u30ad\u30fc\u306b\u3088\u308b\u5358\u4e00\u30ec\u30b3\u30fc\u30c9\u306e\u53d6\u5f97<\/h3>\n\n\n\n<p>\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u304b\u3089\u3001\u3088\u308a\u5b9f\u8df5\u7684\u306a\u30d1\u30bf\u30fc\u30f3\u307e\u3067\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\n$user = User::find(1);\n\n\/\/ \u7279\u5b9a\u306e\u30ab\u30e9\u30e0\u306e\u307f\u3092\u53d6\u5f97\n$userName = User::find(1, ['name', 'email']);\n\n\/\/ \u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u542b\u3081\u305f\u53d6\u5f97\n$userWithPosts = User::with('posts')-&gt;find(1);\n\n\/\/ \u30af\u30ed\u30fc\u30b8\u30e3\u3092\u4f7f\u7528\u3057\u305f\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u6761\u4ef6\u4ed8\u304d\u53d6\u5f97\n$userWithRecentPosts = User::with(['posts' =&gt; function($query) {\n    $query-&gt;where('created_at', '&gt;=', now()-&gt;subDays(7));\n}])-&gt;find(1);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u8907\u6570\u306e\u30e1\u30a4\u30f3\u30ad\u30fc\u3092\u4f7f\u7528\u3057\u305f\u8907\u6570\u30ec\u30b3\u30fc\u30c9\u306e\u53d6\u5f97<\/h3>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u306f\u914d\u5217\u3092\u6e21\u3059\u3053\u3068\u3067\u3001\u8907\u6570\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u4e00\u5ea6\u306b\u53d6\u5f97\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8907\u6570\u306eID\u3092\u6307\u5b9a\u3057\u3066\u53d6\u5f97\n$users = User::find([1, 2, 3]);\n\n\/\/ \u7279\u5b9a\u306e\u30ab\u30e9\u30e0\u306e\u307f\u3092\u53d6\u5f97\n$users = User::find([1, 2, 3], ['id', 'name', 'email']);\n\n\/\/ \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u305f\u52a0\u5de5\n$userNames = User::find([1, 2, 3])\n    -&gt;pluck('name')\n    -&gt;toArray();\n\n\/\/ whereIn\u3068\u306e\u9055\u3044\n\/\/ find\u306e\u5834\u5408\uff08\u9806\u5e8f\u306f\u4fdd\u6301\u3055\u308c\u308b\uff09\n$users = User::find([3, 1, 2]); \/\/ 3, 1, 2\u306e\u9806\u3067\u8fd4\u3055\u308c\u308b\n\n\/\/ whereIn\u306e\u5834\u5408\uff08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u9806\u5e8f\uff09\n$users = User::whereIn('id', [3, 1, 2])-&gt;get(); \/\/ ID\u306e\u6607\u9806\u3067\u8fd4\u3055\u308c\u308b<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u30ab\u30b9\u30bf\u30e0\u66f8\u304d\u8fbc\u307f\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u9ad8\u5ea6\u306a\u691c\u7d22<\/h3>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u3092\u30ab\u30b9\u30bf\u30e0\u30af\u30a8\u30ea\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u306a\u691c\u7d22\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30b9\u30b3\u30fc\u30d7\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\nclass User extends Model\n{\n    public function scopeActive($query)\n    {\n        return $query-&gt;where('status', 'active');\n    }\n}\n\n\/\/ \u30a2\u30af\u30c6\u30a3\u30d6\u30e6\u30fc\u30b6\u30fc\u306e\u4e2d\u304b\u3089ID\u6307\u5b9a\u3067\u53d6\u5f97\n$activeUser = User::active()-&gt;find(1);\n\n\/\/ \u30b0\u30ed\u30fc\u30d0\u30eb\u30b9\u30b3\u30fc\u30d7\u306e\u4e00\u6642\u7684\u306a\u89e3\u9664\n$user = User::withoutGlobalScope('active')-&gt;find(1);\n\n\/\/ \u8907\u96d1\u306a\u6761\u4ef6\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\n$user = User::where(function($query) {\n    $query-&gt;where('status', 'active')\n          -&gt;orWhere('role', 'admin');\n})-&gt;find(1);<\/pre>\n\n\n\n<p>\u5b9f\u88c5\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ea\u30dd\u30b8\u30c8\u30ea\u30d1\u30bf\u30fc\u30f3\u3067\u306e\u5b9f\u88c5\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class UserRepository\n{\n    public function findWithCache($id)\n    {\n        return Cache::remember(\"user.{$id}\", 3600, function() use ($id) {\n            return User::find($id);\n        });\n    }\n\n    public function findWithValidation($id)\n    {\n        $user = User::find($id);\n\n        throw_if(!$user, new UserNotFoundException(\"User {$id} not found\"));\n\n        return $user;\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30b5\u30fc\u30d3\u30b9\u30af\u30e9\u30b9\u3067\u306e\u5b9f\u88c5\u4f8b\uff1a<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class UserService\n{\n    private $repository;\n\n    public function __construct(UserRepository $repository)\n    {\n        $this-&gt;repository = $repository;\n    }\n\n    public function getUserDetails($id)\n    {\n        $user = $this-&gt;repository-&gt;findWithCache($id);\n\n        return [\n            'user' =&gt; $user,\n            'recent_activities' =&gt; $user-&gt;activities()-&gt;recent()-&gt;get(),\n            'permissions' =&gt; $user-&gt;getAllPermissions()\n        ];\n    }\n}<\/pre>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n<div id=\"id-6a4d054e-1351-433d-8c3f-a27ccdba19a9\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3<\/th><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u6ce8\u610f\u70b9<\/th><\/tr><\/thead><tbody><tr><td>\u5358\u4e00\u30ec\u30b3\u30fc\u30c9\u53d6\u5f97<\/td><td>\u30b7\u30f3\u30d7\u30eb\u3067\u76f4\u611f\u7684<\/td><td>N+1\u554f\u984c\u306b\u6ce8\u610f<\/td><\/tr><tr><td>\u8907\u6570\u30ec\u30b3\u30fc\u30c9\u53d6\u5f97<\/td><td>\u4e00\u62ec\u53d6\u5f97\u304c\u53ef\u80fd<\/td><td>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306b\u6ce8\u610f<\/td><\/tr><tr><td>\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u4ed8\u304d\u53d6\u5f97<\/td><td>\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u304c\u4fdd\u8a3c\u3055\u308c\u308b<\/td><td>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30a4\u30f3\u30d1\u30af\u30c8<\/td><\/tr><tr><td>\u30ab\u30b9\u30bf\u30e0\u30af\u30a8\u30ea\u7d44\u307f\u5408\u308f\u305b<\/td><td>\u67d4\u8edf\u306a\u691c\u7d22\u304c\u53ef\u80fd<\/td><td>\u30af\u30a8\u30ea\u306e\u8907\u96d1\u5316\u306b\u6ce8\u610f<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001find\u30e1\u30bd\u30c3\u30c9\u3092\u3088\u308a\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-7\">find\u30e1\u30bd\u30c3\u30c9\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/h2>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5805\u7262\u6027\u3092\u9ad8\u3081\u308b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u69d8\u3005\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d1\u30bf\u30fc\u30f3\u3068\u5b9f\u88c5\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">ModelNotFoundException\u306e\u9069\u5207\u306a\u51e6\u7406\u65b9\u6cd5<\/h3>\n\n\n\n<p>ModelNotFoundException\u306f\u3001findOrFail\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u305f\u969b\u306b\u30ec\u30b3\u30fc\u30c9\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306b\u30b9\u30ed\u30fc\u3055\u308c\u308b\u4f8b\u5916\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u69d8\u3005\u306a\u51e6\u7406\u30d1\u30bf\u30fc\u30f3\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306a\u4f8b\u5916\u51e6\u7406<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">use Illuminate\\Database\\Eloquent\\ModelNotFoundException;\n\nclass UserController extends Controller\n{\n    public function show($id)\n    {\n        try {\n            $user = User::findOrFail($id);\n            return response()-&gt;json($user);\n        } catch (ModelNotFoundException $e) {\n            \/\/ \u30ed\u30b0\u51fa\u529b\n            \\Log::error('User not found:', [\n                'id' =&gt; $id,\n                'exception' =&gt; $e-&gt;getMessage()\n            ]);\n\n            \/\/ \u30a8\u30e9\u30fc\u30ec\u30b9\u30dd\u30f3\u30b9\n            return response()-&gt;json([\n                'message' =&gt; '\u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093',\n                'error_code' =&gt; 'USER_NOT_FOUND'\n            ], 404);\n        }\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u4f8b\u5916\u30cf\u30f3\u30c9\u30e9\u30fc\u3067\u306e\u51e6\u7406<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ app\/Exceptions\/Handler.php\nclass Handler extends ExceptionHandler\n{\n    public function render($request, Throwable $exception)\n    {\n        if ($exception instanceof ModelNotFoundException) {\n            $modelName = class_basename($exception-&gt;getModel());\n\n            if ($request-&gt;expectsJson()) {\n                return response()-&gt;json([\n                    'message' =&gt; \"{$modelName}\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\",\n                    'error_code' =&gt; strtoupper($modelName) . '_NOT_FOUND'\n                ], 404);\n            }\n\n            \/\/ Web\u753b\u9762\u306e\u5834\u5408\n            return response()-&gt;view('errors.404', [\n                'message' =&gt; \"{$modelName}\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\"\n            ], 404);\n        }\n\n        return parent::render($request, $exception);\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u4f5c\u6210<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ app\/Exceptions\/UserNotFoundException.php\nclass UserNotFoundException extends ModelNotFoundException\n{\n    protected $model = User::class;\n\n    public function render($request)\n    {\n        return response()-&gt;json([\n            'message' =&gt; '\u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093',\n            'error_code' =&gt; 'USER_NOT_FOUND',\n            'help_text' =&gt; '\u6b63\u3057\u3044\u30e6\u30fc\u30b6\u30fcID\u3092\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044'\n        ], 404);\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nclass UserController extends Controller\n{\n    public function show($id)\n    {\n        $user = User::find($id);\n\n        if (!$user) {\n            throw new UserNotFoundException;\n        }\n\n        return response()-&gt;json($user);\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">findOrFail\u3092\u4f7f\u7528\u3057\u305f\u4f8b\u5916\u51e6\u7406\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p>findOrFail\u30e1\u30bd\u30c3\u30c9\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b5\u30fc\u30d3\u30b9\u30af\u30e9\u30b9\u3067\u306e\u5b9f\u88c5<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class UserService\n{\n    public function getUserProfile($id)\n    {\n        try {\n            $user = User::with(['profile', 'settings'])\n                -&gt;findOrFail($id);\n\n            return [\n                'status' =&gt; 'success',\n                'data' =&gt; $user\n            ];\n        } catch (ModelNotFoundException $e) {\n            return [\n                'status' =&gt; 'error',\n                'message' =&gt; '\u30e6\u30fc\u30b6\u30fc\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093'\n            ];\n        }\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u3067\u306e\u5b9f\u88c5<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ app\/Http\/Middleware\/EnsureUserExists.php\nclass EnsureUserExists\n{\n    public function handle($request, Closure $next)\n    {\n        try {\n            $user = User::findOrFail($request-&gt;route('user'));\n            $request-&gt;merge(['user' =&gt; $user]);\n\n            return $next($request);\n        } catch (ModelNotFoundException $e) {\n            return response()-&gt;json([\n                'message' =&gt; '\u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093'\n            ], 404);\n        }\n    }\n}<\/pre>\n\n\n\n<p>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n<div id=\"id-5332b1f0-7a9e-4cb8-944b-335ce4079cd1\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30d1\u30bf\u30fc\u30f3<\/th><th>\u4f7f\u7528\u5834\u9762<\/th><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u30c7\u30e1\u30ea\u30c3\u30c8<\/th><\/tr><\/thead><tbody><tr><td>try-catch<\/td><td>\u500b\u5225\u306e\u51e6\u7406\u304c\u5fc5\u8981\u306a\u5834\u5408<\/td><td>\u304d\u3081\u7d30\u304b\u3044\u5236\u5fa1\u304c\u53ef\u80fd<\/td><td>\u30b3\u30fc\u30c9\u304c\u5197\u9577\u306b\u306a\u308b<\/td><\/tr><tr><td>\u30b0\u30ed\u30fc\u30d0\u30eb\u30cf\u30f3\u30c9\u30e9\u30fc<\/td><td>\u5171\u901a\u306e\u30a8\u30e9\u30fc\u51e6\u7406<\/td><td>\u30b3\u30fc\u30c9\u306e\u91cd\u8907\u3092\u907f\u3051\u3089\u308c\u308b<\/td><td>\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u6027\u304c\u4f4e\u3044<\/td><\/tr><tr><td>\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916<\/td><td>\u7279\u5b9a\u306e\u30e2\u30c7\u30eb\u7528\u306e\u51e6\u7406<\/td><td>\u518d\u5229\u7528\u6027\u304c\u9ad8\u3044<\/td><td>\u5b9f\u88c5\u30b3\u30b9\u30c8\u304c\u9ad8\u3044<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u6642\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ed\u30b0\u51fa\u529b\u306e\u91cd\u8981\u6027<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a8\u30e9\u30fc\u60c5\u5831\u306e\u8a73\u7d30\u306a\u30ed\u30b0\u51fa\u529b\n\\Log::error('Record not found', [\n    'model' =&gt; User::class,\n    'id' =&gt; $id,\n    'user_ip' =&gt; request()-&gt;ip(),\n    'trace' =&gt; debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS)\n]);<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u56fd\u969b\u5316<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ resources\/lang\/ja\/messages.php\nreturn [\n    'user_not_found' =&gt; '\u30e6\u30fc\u30b6\u30fcID :id \u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093',\n];\n\n\/\/ \u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u3067\u306e\u4f7f\u7528\nreturn response()-&gt;json([\n    'message' =&gt; __('messages.user_not_found', ['id' =&gt; $id])\n], 404);<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30c7\u30d0\u30c3\u30b0\u60c5\u5831\u306e\u5236\u5fa1<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ config\/app.php \u306edebug\u306e\u5024\u306b\u5fdc\u3058\u3066\u30a8\u30e9\u30fc\u60c5\u5831\u3092\u5236\u5fa1\n$errorResponse = [\n    'message' =&gt; '\u30e6\u30fc\u30b6\u30fc\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093',\n    'error_code' =&gt; 'USER_NOT_FOUND'\n];\n\nif (config('app.debug')) {\n    $errorResponse['debug'] = [\n        'exception' =&gt; get_class($e),\n        'trace' =&gt; $e-&gt;getTrace()\n    ];\n}\n\nreturn response()-&gt;json($errorResponse, 404);<\/pre>\n\n\n\n<p>\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4fe1\u983c\u6027\u3068\u4fdd\u5b88\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001find\u30e1\u30bd\u30c3\u30c9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-10\">find\u30e1\u30bd\u30c3\u30c9\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/h2>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u3092\u52b9\u7387\u7684\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u6280\u8853\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u6700\u9069\u5316\u306b\u3088\u308a\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5fdc\u7b54\u6027\u3068 scalability \u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">N+1\u554f\u984c\u306e\u56de\u907f\u3068Eager\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p>N+1\u554f\u984c\u306f\u3001find\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u6027\u80fd\u554f\u984c\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u3092\u793a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306aEager\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ N+1\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u30b3\u30fc\u30c9\n$users = User::find([1, 2, 3]);\nforeach ($users as $user) {\n    echo $user-&gt;profile-&gt;bio; \/\/ \u8ffd\u52a0\u306e\u30af\u30a8\u30ea\u304c\u5b9f\u884c\u3055\u308c\u308b\n}\n\n\/\/ Eager\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u305f\u6700\u9069\u5316\n$users = User::with('profile')-&gt;find([1, 2, 3]);\nforeach ($users as $user) {\n    echo $user-&gt;profile-&gt;bio; \/\/ \u8ffd\u52a0\u306e\u30af\u30a8\u30ea\u306f\u5b9f\u884c\u3055\u308c\u306a\u3044\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u8907\u6570\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u306eEager\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8907\u6570\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u4e00\u5ea6\u306b\u8aad\u307f\u8fbc\u3080\n$user = User::with(['profile', 'posts', 'comments'])\n    -&gt;find(1);\n\n\/\/ \u30cd\u30b9\u30c8\u3055\u308c\u305f\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u8aad\u307f\u8fbc\u307f\n$user = User::with(['posts.comments', 'profile.settings'])\n    -&gt;find(1);\n\n\/\/ \u6761\u4ef6\u4ed8\u304dEager\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\n$user = User::with(['posts' =&gt; function($query) {\n    $query-&gt;where('published', true)\n          -&gt;orderBy('created_at', 'desc')\n          -&gt;limit(5);\n}])-&gt;find(1);<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30af\u30a8\u30ea\u30ab\u30a6\u30f3\u30c8\u306e\u76e3\u8996<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30c7\u30d0\u30c3\u30b0\u7528\u306e\u30af\u30a8\u30ea\u30ed\u30b0\u8a2d\u5b9a\n\\DB::listen(function($query) {\n    \\Log::info(\n        $query-&gt;sql,\n        [\n            'bindings' =&gt; $query-&gt;bindings,\n            'time' =&gt; $query-&gt;time\n        ]\n    );\n});\n\n\/\/ \u30af\u30a8\u30ea\u30ab\u30a6\u30f3\u30bf\u30fc\u306e\u5b9f\u88c5\nclass QueryCounter\n{\n    private static $count = 0;\n\n    public static function increment()\n    {\n        self::$count++;\n    }\n\n    public static function getCount()\n    {\n        return self::$count;\n    }\n\n    public static function reset()\n    {\n        self::$count = 0;\n    }\n}\n\n\/\/ \u30df\u30c9\u30eb\u30a6\u30a7\u30a2\u3067\u306e\u4f7f\u7528\nclass QueryCounterMiddleware\n{\n    public function handle($request, Closure $next)\n    {\n        QueryCounter::reset();\n\n        \\DB::listen(function($query) {\n            QueryCounter::increment();\n        });\n\n        $response = $next($request);\n\n        \/\/ \u30ea\u30af\u30a8\u30b9\u30c8\u5b8c\u4e86\u6642\u306e\u30af\u30a8\u30ea\u6570\u3092\u30ed\u30b0\u306b\u8a18\u9332\n        \\Log::info('Query count: ' . QueryCounter::getCount());\n\n        return $response;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565<\/h3>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u306e\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u524a\u6e1b\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u5b9f\u88c5<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30b7\u30f3\u30d7\u30eb\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u5b9f\u88c5\n$user = Cache::remember('user.' . $id, 3600, function() use ($id) {\n    return User::find($id);\n});\n\n\/\/ \u30bf\u30b0\u4ed8\u304d\u30ad\u30e3\u30c3\u30b7\u30e5\n$user = Cache::tags(['users', 'profile'])-&gt;remember(\n    'user.' . $id,\n    3600,\n    function() use ($id) {\n        return User::with('profile')-&gt;find($id);\n    }\n);<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30e2\u30c7\u30eb\u30a4\u30d9\u30f3\u30c8\u3068\u9023\u52d5\u3057\u305f\u30ad\u30e3\u30c3\u30b7\u30e5\u5236\u5fa1<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class User extends Model\n{\n    protected static function boot()\n    {\n        parent::boot();\n\n        \/\/ \u30e2\u30c7\u30eb\u66f4\u65b0\u6642\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2\n        static::updated(function ($user) {\n            Cache::tags(['users'])-&gt;forget('user.' . $user-&gt;id);\n        });\n\n        \/\/ \u30e2\u30c7\u30eb\u524a\u9664\u6642\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2\n        static::deleted(function ($user) {\n            Cache::tags(['users'])-&gt;forget('user.' . $user-&gt;id);\n        });\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30ea\u30dd\u30b8\u30c8\u30ea\u30d1\u30bf\u30fc\u30f3<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class CachedUserRepository implements UserRepositoryInterface\n{\n    private $cache;\n    private $repository;\n\n    public function __construct(Cache $cache, UserRepository $repository)\n    {\n        $this-&gt;cache = $cache;\n        $this-&gt;repository = $repository;\n    }\n\n    public function find($id)\n    {\n        $cacheKey = 'user.' . $id;\n\n        return $this-&gt;cache-&gt;remember(\n            $cacheKey,\n            3600,\n            function() use ($id) {\n                return $this-&gt;repository-&gt;find($id);\n            }\n        );\n    }\n\n    public function flush($id)\n    {\n        return $this-&gt;cache-&gt;forget('user.' . $id);\n    }\n}<\/pre>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n<div id=\"id-55ad76a4-215b-45d0-b481-5192dd576579\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6700\u9069\u5316\u624b\u6cd5<\/th><th>\u52b9\u679c<\/th><th>\u5b9f\u88c5\u30b3\u30b9\u30c8<\/th><th>\u9069\u7528\u30b7\u30fc\u30f3<\/th><\/tr><\/thead><tbody><tr><td>Eager Loading<\/td><td>N+1\u554f\u984c\u306e\u89e3\u6d88<\/td><td>\u4f4e<\/td><td>\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u53c2\u7167\u6642<\/td><\/tr><tr><td>\u30ad\u30e3\u30c3\u30b7\u30e5<\/td><td>\u5fdc\u7b54\u6642\u9593\u306e\u77ed\u7e2e<\/td><td>\u4e2d<\/td><td>\u983b\u7e41\u306a\u30a2\u30af\u30bb\u30b9\u6642<\/td><\/tr><tr><td>\u30af\u30a8\u30ea\u76e3\u8996<\/td><td>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8a08\u6e2c<\/td><td>\u4f4e<\/td><td>\u958b\u767a\u30fb\u30c7\u30d0\u30c3\u30b0\u6642<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u306e\u30d2\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30af\u30a8\u30ea\u30ed\u30b0\u306e\u5206\u6790<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ config\/database.php\n'mysql' =&gt; [\n    'dump' =&gt; true,  \/\/ \u30af\u30a8\u30ea\u3092\u30c0\u30f3\u30d7\n    'log' =&gt; true,   \/\/ \u30af\u30a8\u30ea\u3092\u30ed\u30b0\u306b\u8a18\u9332\n]\n\n\/\/ \u30af\u30a8\u30ea\u306e\u5b9f\u884c\u6642\u9593\u3092\u8a08\u6e2c\n$start = microtime(true);\n$user = User::find(1);\n$time = microtime(true) - $start;\n\\Log::info(\"Query execution time: {$time}s\");<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30d2\u30c3\u30c8\u7387\u306e\u76e3\u8996<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class CacheMetrics\n{\n    public static function trackCacheHit($key)\n    {\n        Redis::incr('cache.hits');\n        \\Log::info(\"Cache hit: {$key}\");\n    }\n\n    public static function trackCacheMiss($key)\n    {\n        Redis::incr('cache.misses');\n        \\Log::info(\"Cache miss: {$key}\");\n    }\n\n    public static function getHitRate()\n    {\n        $hits = Redis::get('cache.hits') ?? 0;\n        $misses = Redis::get('cache.misses') ?? 0;\n        $total = $hits + $misses;\n\n        return $total &gt; 0 ? ($hits \/ $total) * 100 : 0;\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001find\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-13\">\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u96c6<\/h2>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b\u3092\u3001\u5177\u4f53\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u306b\u57fa\u3065\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u72b6\u6cc1\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">REST API\u3067\u306efind\u30e1\u30bd\u30c3\u30c9\u306e\u6d3b\u7528\u4f8b<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306aRESTful API\u306e\u5b9f\u88c5<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ProductController extends Controller\n{\n    public function show($id)\n    {\n        try {\n            $product = Product::with(['category', 'tags'])\n                -&gt;findOrFail($id);\n\n            return response()-&gt;json([\n                'status' =&gt; 'success',\n                'data' =&gt; new ProductResource($product)\n            ]);\n        } catch (ModelNotFoundException $e) {\n            return response()-&gt;json([\n                'status' =&gt; 'error',\n                'message' =&gt; '\u5546\u54c1\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093'\n            ], 404);\n        }\n    }\n\n    \/\/ API Resource \u306b\u3088\u308b\u6574\u5f62\n    class ProductResource extends JsonResource\n    {\n        public function toArray($request)\n        {\n            return [\n                'id' =&gt; $this-&gt;id,\n                'name' =&gt; $this-&gt;name,\n                'price' =&gt; $this-&gt;price,\n                'category' =&gt; new CategoryResource($this-&gt;whenLoaded('category')),\n                'tags' =&gt; TagResource::collection($this-&gt;whenLoaded('tags')),\n                'available' =&gt; $this-&gt;checkAvailability(),\n                'created_at' =&gt; $this-&gt;created_at-&gt;toIso8601String()\n            ];\n        }\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30d0\u30eb\u30af\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u88c5<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class BulkProductController extends Controller\n{\n    public function bulkShow(Request $request)\n    {\n        $productIds = $request-&gt;validate([\n            'ids' =&gt; 'required|array',\n            'ids.*' =&gt; 'integer|exists:products,id'\n        ]);\n\n        $products = Product::with(['category', 'tags'])\n            -&gt;find($productIds['ids']);\n\n        return ProductResource::collection($products);\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u8907\u96d1\u306a\u691c\u7d22\u6761\u4ef6\u3067\u306e\u4f7f\u7528\u4f8b<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6761\u4ef6\u4ed8\u304d\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u542b\u3080\u691c\u7d22<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class OrderController extends Controller\n{\n    public function findWithDetails($id)\n    {\n        $order = Order::with(['items' =&gt; function($query) {\n            $query-&gt;where('status', 'active')\n                  -&gt;orderBy('price', 'desc');\n        }, 'customer' =&gt; function($query) {\n            $query-&gt;with(['address', 'paymentMethods']);\n        }])-&gt;find($id);\n\n        if (!$order) {\n            throw new OrderNotFoundException($id);\n        }\n\n        \/\/ \u5408\u8a08\u91d1\u984d\u306e\u8a08\u7b97\n        $order-&gt;total = $order-&gt;items-&gt;sum('price');\n\n        \/\/ \u914d\u9001\u30b9\u30c6\u30fc\u30bf\u30b9\u306e\u78ba\u8a8d\n        $order-&gt;shipping_status = $this-&gt;checkShippingStatus($order);\n\n        return new OrderResource($order);\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u8907\u6570\u306e\u6761\u4ef6\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u691c\u7d22<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ProductService\n{\n    public function findAvailableProduct($id)\n    {\n        $product = Product::where(function($query) {\n            $query-&gt;where('status', 'active')\n                  -&gt;where('stock', '&gt;', 0)\n                  -&gt;where('available_from', '&lt;=', now());\n        })-&gt;find($id);\n\n        if (!$product) {\n            throw new ProductNotAvailableException($id);\n        }\n\n        return $product;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u542b\u3080\u30e2\u30c7\u30eb\u306e\u691c\u7d22\u4f8b<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6df1\u3044\u30cd\u30b9\u30c8\u3092\u6301\u3064\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u53d6\u5f97<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class CourseController extends Controller\n{\n    public function findWithAllRelations($id)\n    {\n        $course = Course::with([\n            'instructor.profile',\n            'modules' =&gt; function($query) {\n                $query-&gt;orderBy('order');\n            },\n            'modules.lessons' =&gt; function($query) {\n                $query-&gt;orderBy('order');\n            },\n            'modules.lessons.attachments',\n            'students' =&gt; function($query) {\n                $query-&gt;where('status', 'active');\n            },\n            'students.progress'\n        ])-&gt;find($id);\n\n        if (!$course) {\n            return null;\n        }\n\n        \/\/ \u9032\u6357\u72b6\u6cc1\u306e\u8a08\u7b97\n        $course-&gt;completion_rate = $this-&gt;calculateCompletionRate($course);\n\n        \/\/ \u30a2\u30af\u30bb\u30b9\u6a29\u306e\u30c1\u30a7\u30c3\u30af\n        $course-&gt;user_has_access = $this-&gt;checkUserAccess(auth()-&gt;user(), $course);\n\n        return new CourseResource($course);\n    }\n\n    private function calculateCompletionRate($course)\n    {\n        $totalLessons = $course-&gt;modules-&gt;flatMap-&gt;lessons-&gt;count();\n        $completedLessons = $course-&gt;students\n            -&gt;where('id', auth()-&gt;id())\n            -&gt;first()\n            -&gt;progress\n            -&gt;where('completed', true)\n            -&gt;count();\n\n        return $totalLessons &gt; 0 \n            ? ($completedLessons \/ $totalLessons) * 100 \n            : 0;\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30c3\u30af\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u51e6\u7406<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class CommentableController extends Controller\n{\n    public function findCommentable($type, $id)\n    {\n        $modelMap = [\n            'post' =&gt; Post::class,\n            'video' =&gt; Video::class,\n            'product' =&gt; Product::class\n        ];\n\n        if (!isset($modelMap[$type])) {\n            throw new InvalidCommentableTypeException($type);\n        }\n\n        $model = $modelMap[$type];\n\n        $commentable = $model::with(['comments' =&gt; function($query) {\n            $query-&gt;orderBy('created_at', 'desc')\n                  -&gt;with('user.profile');\n        }])-&gt;find($id);\n\n        if (!$commentable) {\n            throw new ModelNotFoundException;\n        }\n\n        return new CommentableResource($commentable);\n    }\n}<\/pre>\n\n\n\n<p>\u5b9f\u88c5\u6642\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n<div id=\"id-8596fb6b-6287-499b-8e87-25f7e4675428\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/th><th>\u8003\u616e\u3059\u3079\u304d\u70b9<\/th><th>\u63a8\u5968\u3055\u308c\u308b\u5b9f\u88c5\u65b9\u6cd5<\/th><\/tr><\/thead><tbody><tr><td>REST API<\/td><td>\u30ec\u30b9\u30dd\u30f3\u30b9\u5f62\u5f0f\u306e\u4e00\u8cab\u6027<\/td><td>API Resource\u306e\u4f7f\u7528<\/td><\/tr><tr><td>\u8907\u96d1\u306a\u691c\u7d22<\/td><td>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027<\/td><td>\u30af\u30a8\u30ea\u30b9\u30b3\u30fc\u30d7\u306e\u6d3b\u7528<\/td><\/tr><tr><td>\u30cd\u30b9\u30c8\u3055\u308c\u305f\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3<\/td><td>N+1\u554f\u984c\u306e\u9632\u6b62<\/td><td>\u9069\u5207\u306aEager Loading<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3092\u53c2\u8003\u306b\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5408\u308f\u305b\u305f\u6700\u9069\u306a\u5b9f\u88c5\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001find\u30e1\u30bd\u30c3\u30c9\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u30d2\u30f3\u30c8\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-17\">find\u30e1\u30bd\u30c3\u30c9\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u30d2\u30f3\u30c8<\/h2>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u3001\u5b9f\u88c5\u6642\u306e\u91cd\u8981\u306a\u30d2\u30f3\u30c8\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30af\u30ea\u30fc\u30f3\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ea\u30dd\u30b8\u30c8\u30ea\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9a\u7fa9\ninterface UserRepositoryInterface\n{\n    public function find($id);\n    public function findOrFail($id);\n    public function findMany(array $ids);\n}\n\n\/\/ \u5177\u8c61\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\nclass UserRepository implements UserRepositoryInterface\n{\n    private $model;\n    private $cache;\n\n    public function __construct(User $model, Cache $cache)\n    {\n        $this-&gt;model = $model;\n        $this-&gt;cache = $cache;\n    }\n\n    public function find($id)\n    {\n        return $this-&gt;cache-&gt;remember(\n            \"user.{$id}\",\n            3600,\n            fn() =&gt; $this-&gt;model-&gt;with(['profile', 'settings'])-&gt;find($id)\n        );\n    }\n\n    public function findOrFail($id)\n    {\n        $user = $this-&gt;find($id);\n\n        if (!$user) {\n            throw new UserNotFoundException($id);\n        }\n\n        return $user;\n    }\n\n    public function findMany(array $ids)\n    {\n        return $this-&gt;model-&gt;with(['profile', 'settings'])-&gt;find($ids);\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30b5\u30fc\u30d3\u30b9\u30ec\u30a4\u30e4\u30fc\u30d1\u30bf\u30fc\u30f3<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class UserService\n{\n    private $repository;\n    private $logger;\n\n    public function __construct(\n        UserRepositoryInterface $repository,\n        LoggerInterface $logger\n    ) {\n        $this-&gt;repository = $repository;\n        $this-&gt;logger = $logger;\n    }\n\n    public function getUserDetails($id)\n    {\n        try {\n            $user = $this-&gt;repository-&gt;findOrFail($id);\n\n            return [\n                'user' =&gt; $user,\n                'permissions' =&gt; $this-&gt;getUserPermissions($user),\n                'activity' =&gt; $this-&gt;getRecentActivity($user)\n            ];\n        } catch (UserNotFoundException $e) {\n            $this-&gt;logger-&gt;error('User not found', ['id' =&gt; $id]);\n            throw $e;\n        }\n    }\n\n    private function getUserPermissions(User $user)\n    {\n        return Gate::inspect('view', $user)-&gt;allowed()\n            ? $user-&gt;getAllPermissions()\n            : [];\n    }\n\n    private function getRecentActivity(User $user)\n    {\n        return $user-&gt;activities()\n            -&gt;recent()\n            -&gt;limit(10)\n            -&gt;get();\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u5024\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6d3b\u7528<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class UserId\n{\n    private $value;\n\n    public function __construct($value)\n    {\n        if (!is_int($value) || $value &lt;= 0) {\n            throw new InvalidArgumentException('Invalid user ID');\n        }\n\n        $this-&gt;value = $value;\n    }\n\n    public function getValue(): int\n    {\n        return $this-&gt;value;\n    }\n}\n\nclass UserRepository\n{\n    public function find(UserId $id)\n    {\n        return User::find($id-&gt;getValue());\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u30c6\u30b9\u30c8\u3057\u3084\u3059\u3044find\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e2\u30c3\u30af\u3092\u4f7f\u7528\u3057\u305f\u30c6\u30b9\u30c8<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class UserServiceTest extends TestCase\n{\n    public function testFindUserSuccess()\n    {\n        \/\/ \u30ea\u30dd\u30b8\u30c8\u30ea\u306e\u30e2\u30c3\u30af\u3092\u4f5c\u6210\n        $repository = $this-&gt;createMock(UserRepositoryInterface::class);\n        $repository-&gt;expects($this-&gt;once())\n            -&gt;method('findOrFail')\n            -&gt;with(1)\n            -&gt;willReturn(new User(['id' =&gt; 1, 'name' =&gt; 'Test User']));\n\n        $service = new UserService($repository);\n        $result = $service-&gt;getUserDetails(1);\n\n        $this-&gt;assertEquals('Test User', $result['user']-&gt;name);\n    }\n\n    public function testFindUserNotFound()\n    {\n        $repository = $this-&gt;createMock(UserRepositoryInterface::class);\n        $repository-&gt;expects($this-&gt;once())\n            -&gt;method('findOrFail')\n            -&gt;with(999)\n            -&gt;willThrow(new UserNotFoundException);\n\n        $this-&gt;expectException(UserNotFoundException::class);\n\n        $service = new UserService($repository);\n        $service-&gt;getUserDetails(999);\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30c6\u30b9\u30c8\u7528\u306e\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u306e\u6d3b\u7528<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class UserFactory extends Factory\n{\n    protected $model = User::class;\n\n    public function definition()\n    {\n        return [\n            'name' =&gt; $this-&gt;faker-&gt;name,\n            'email' =&gt; $this-&gt;faker-&gt;unique()-&gt;safeEmail,\n            'password' =&gt; Hash::make('password'),\n        ];\n    }\n\n    public function withProfile()\n    {\n        return $this-&gt;afterCreating(function (User $user) {\n            Profile::factory()-&gt;create(['user_id' =&gt; $user-&gt;id]);\n        });\n    }\n}\n\nclass UserRepositoryTest extends TestCase\n{\n    public function testFindWithProfile()\n    {\n        $user = User::factory()\n            -&gt;withProfile()\n            -&gt;create();\n\n        $repository = new UserRepository(new User);\n        $foundUser = $repository-&gt;find($user-&gt;id);\n\n        $this-&gt;assertNotNull($foundUser-&gt;profile);\n    }\n}<\/pre>\n\n\n\n<p>\u5b9f\u88c5\u6642\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n<div id=\"id-06123490-c1ae-4df9-930f-8327ef1164b5\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30d1\u30bf\u30fc\u30f3<\/th><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u4f7f\u7528\u30b7\u30fc\u30f3<\/th><\/tr><\/thead><tbody><tr><td>\u30ea\u30dd\u30b8\u30c8\u30ea\u30d1\u30bf\u30fc\u30f3<\/td><td>\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u306e\u62bd\u8c61\u5316<\/td><td>\u5927\u898f\u6a21\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/td><\/tr><tr><td>\u30b5\u30fc\u30d3\u30b9\u30ec\u30a4\u30e4\u30fc<\/td><td>\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u306e\u5206\u96e2<\/td><td>\u8907\u96d1\u306a\u30c9\u30e1\u30a4\u30f3\u30ed\u30b8\u30c3\u30af<\/td><\/tr><tr><td>\u5024\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/td><td>\u578b\u306e\u5b89\u5168\u6027\u78ba\u4fdd<\/td><td>\u91cd\u8981\u306a\u30c9\u30e1\u30a4\u30f3\u6982\u5ff5<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u5b9f\u88c5\u6642\u306e\u91cd\u8981\u306a\u30d2\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u547d\u540d\u898f\u5247\u306e\u7d71\u4e00<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u826f\u3044\u4f8b\npublic function findActiveUser($id)\npublic function findByEmail($email)\npublic function findLatestOrder($userId)\n\n\/\/ \u907f\u3051\u308b\u3079\u304d\u4f8b\npublic function getUser($id)\npublic function searchByEmail($email)\npublic function fetchLatestOrder($userId)<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u306e\u6d3b\u7528<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30af\u30a8\u30ea\u30d3\u30eb\u30c0\u30fc\u306e\u6d41\u66a2\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\n$user = User::active()\n    -&gt;withProfile()\n    -&gt;withLastLogin()\n    -&gt;find($id);\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\n$user = $userRepository\n    -&gt;withCache()\n    -&gt;withTracking()\n    -&gt;find($id);<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u6a19\u6e96\u5316<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u5316\nclass ModelNotFoundMessage\n{\n    public static function create($model, $id): string\n    {\n        return sprintf(\n            '%s with ID %s was not found',\n            class_basename($model),\n            $id\n        );\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nthrow new ModelNotFoundException(\n    ModelNotFoundMessage::create(User::class, $id)\n);<\/pre>\n\n\n\n<p>find\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\u306b\u304a\u3044\u3066\u3001\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u30d1\u30bf\u30fc\u30f3\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u30c6\u30b9\u30c8\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u898f\u6a21\u3084\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u3001\u6700\u9069\u306a\u30d1\u30bf\u30fc\u30f3\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":{"0":"post-2593","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-php","7":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2593","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2593"}],"version-history":[{"count":2,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2593\/revisions"}],"predecessor-version":[{"id":2595,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2593\/revisions\/2595"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2593"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2593"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}