{"id":2703,"date":"2025-03-24T08:46:45","date_gmt":"2025-03-23T23:46:45","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=2703"},"modified":"2025-03-24T08:47:14","modified_gmt":"2025-03-23T23:47:14","slug":"%e3%80%90laravel%e3%80%91pluck%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e5%ae%8c%e5%85%a8%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc%ef%bc%81%e9%85%8d%e5%88%97%e6%93%8d%e4%bd%9c%e3%82%9210%e5%80%8d%e5%8a%b9","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=2703","title":{"rendered":"\u3010Laravel\u3011pluck\u30e1\u30bd\u30c3\u30c9\u5b8c\u5168\u30de\u30b9\u30bf\u30fc\uff01\u914d\u5217\u64cd\u4f5c\u309210\u500d\u52b9\u7387\u5316\u3059\u308b\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af"},"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\">pluck\u30e1\u30bd\u30c3\u30c9\u3068\u306f\uff1f\u57fa\u790e\u304b\u3089\u7406\u89e3\u3059\u308b\u4f7f\u3044\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u914d\u5217\u64cd\u4f5c\u306e\u6551\u4e16\u4e3b\uff01pluck\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u69cb\u6587<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">\u306a\u305cpluck\u30e1\u30bd\u30c3\u30c9\u304c\u9078\u3070\u308c\u308b\u306e\u304b\uff1f\u5f93\u6765\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u6bd4\u8f03<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-6\">pluck\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-7\">\u30b7\u30f3\u30d7\u30eb\u306a\u30ad\u30fc\u53d6\u5f97\u304b\u3089\u30cd\u30b9\u30c8\u3057\u305f\u914d\u5217\u306e\u64cd\u4f5c\u307e\u3067<\/a>      <\/li>      <li>        <a href=\"#i-10\">\u8907\u6570\u306e\u30ad\u30fc\u3092\u540c\u6642\u306b\u53d6\u5f97\u3059\u308b\u88cf\u6280<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-11\">\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u5e83\u304c\u308b\u53ef\u80fd\u6027<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-13\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u5927\u5316\u3059\u308bpluck\u30e1\u30bd\u30c3\u30c9\u306e\u6700\u9069\u5316\u624b\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-14\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u306e\u52b9\u7387\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-18\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6700\u3082\u52b9\u7387\u7684\u306a\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-22\">\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u6d3b\u304b\u305b\u308bpluck\u30e1\u30bd\u30c3\u30c9\u306e\u5fdc\u7528\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-23\">\u7ba1\u7406\u753b\u9762\u3067\u306e\u30c7\u30fc\u30bf\u6574\u5f62\u306b\u6d3b\u7528\u3059\u308b\u624b\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-26\">API\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u6700\u9069\u5316\u4e8b\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-29\">\u30ec\u30dd\u30fc\u30c8\u6a5f\u80fd\u5b9f\u73fe\u6642\u306e\u6d3b\u7528\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-32\">pluck\u30e1\u30bd\u30c3\u30c9\u306e\u3088\u304f\u3042\u308b\u3064\u307e\u305a\u304d\u30dd\u30a4\u30f3\u30c8\u3068\u89e3\u6c7a\u7b56<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-33\">NULL\u3084\u7a7a\u5024\u306e\u6271\u3044\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-36\">\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u5148\u306e\u30c7\u30fc\u30bf\u53d6\u5f97\u6642\u306e\u6ce8\u610f\u70b9<\/a>      <\/li>      <li>        <a href=\"#i-39\">\u578b\u5909\u63db\u306b\u95a2\u3059\u308b\u843d\u3068\u3057\u7a74\u306e\u56de\u907f\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-42\">\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u30c8\u30e9\u30d6\u30eb\u9632\u6b62\u306e\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/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\">pluck\u30e1\u30bd\u30c3\u30c9\u3068\u306f\uff1f\u57fa\u790e\u304b\u3089\u7406\u89e3\u3059\u308b\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<p>\u914d\u5217\u64cd\u4f5c\u306f\u958b\u767a\u8005\u306e\u65e5\u5e38\u696d\u52d9\u3067\u983b\u7e41\u306b\u884c\u3046\u4f5c\u696d\u306e\u4e00\u3064\u3067\u3059\u3002\u7279\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u53d6\u5f97\u3057\u305f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304b\u3089\u7279\u5b9a\u306e\u30ab\u30e9\u30e0\u3060\u3051\u3092\u62bd\u51fa\u3057\u305f\u3044\u5834\u5408\u3001\u52b9\u7387\u7684\u306a\u65b9\u6cd5\u304c\u5fc5\u8981\u3067\u3059\u3002\u305d\u3053\u3067\u6d3b\u8e8d\u3059\u308b\u306e\u304c Laravel \u306e pluck \u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u914d\u5217\u64cd\u4f5c\u306e\u6551\u4e16\u4e3b\uff01pluck\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u69cb\u6587<\/h3>\n\n\n\n<p>pluck \u30e1\u30bd\u30c3\u30c9\u306f\u3001\u914d\u5217\u3084\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304b\u3089\u6307\u5b9a\u3057\u305f\u30ad\u30fc\u306e\u5024\u3060\u3051\u3092\u62bd\u51fa\u3057\u3001\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u6210\u3059\u308b\u5f37\u529b\u306a\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/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\u3044\u65b9\n$users = [\n    ['id' =&gt; 1, 'name' =&gt; '\u5c71\u7530\u592a\u90ce', 'email' =&gt; 'yamada@example.com'],\n    ['id' =&gt; 2, 'name' =&gt; '\u9234\u6728\u82b1\u5b50', 'email' =&gt; 'suzuki@example.com'],\n    ['id' =&gt; 3, 'name' =&gt; '\u4f50\u85e4\u6b21\u90ce', 'email' =&gt; 'sato@example.com'],\n];\n\n\/\/ \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u4f5c\u6210\n$collection = collect($users);\n\n\/\/ name\u30ab\u30e9\u30e0\u306e\u307f\u3092\u62bd\u51fa\n$names = $collection-&gt;pluck('name');\n\/\/ \u7d50\u679c: ['\u5c71\u7530\u592a\u90ce', '\u9234\u6728\u82b1\u5b50', '\u4f50\u85e4\u6b21\u90ce']\n\n\/\/ \u30ad\u30fc\u3068\u5024\u3092\u6307\u5b9a\u3057\u3066\u62bd\u51fa\n$emailsById = $collection-&gt;pluck('email', 'id');\n\/\/ \u7d50\u679c: [1 =&gt; 'yamada@example.com', 2 =&gt; 'suzuki@example.com', 3 =&gt; 'sato@example.com']<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u306a\u305cpluck\u30e1\u30bd\u30c3\u30c9\u304c\u9078\u3070\u308c\u308b\u306e\u304b\uff1f\u5f93\u6765\u306e\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u6bd4\u8f03<\/h3>\n\n\n\n<p>\u5f93\u6765\u306e\u914d\u5217\u64cd\u4f5c\u3068\u6bd4\u8f03\u3057\u3066\u3001pluck \u30e1\u30bd\u30c3\u30c9\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-3\">1. \u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u3055<\/h4>\n\n\n\n<p>\u5f93\u6765\u306e\u65b9\u6cd5\uff08array_column \u3084 foreach\uff09\u3068 pluck \u30e1\u30bd\u30c3\u30c9\u3092\u6bd4\u8f03\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5f93\u6765\u306e\u65b9\u6cd5\uff08foreach\uff09\n$names = [];\nforeach ($users as $user) {\n    $names[] = $user['name'];\n}\n\n\/\/ array_column\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\n$names = array_column($users, 'name');\n\n\/\/ pluck\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\n$names = collect($users)-&gt;pluck('name');<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-4\">2. \u30e1\u30bd\u30c3\u30c9\u30c1\u30a7\u30fc\u30f3\u3068\u306e\u76f8\u6027<\/h4>\n\n\n\n<p>pluck \u30e1\u30bd\u30c3\u30c9\u306f\u4ed6\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u306a\u64cd\u4f5c\u304c\u53ef\u80fd\u3067\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u540d\u524d\u3092\u62bd\u51fa\u3057\u3001\u30bd\u30fc\u30c8\u3057\u3066\u3001\u91cd\u8907\u3092\u9664\u53bb\u3059\u308b\n$uniqueSortedNames = collect($users)\n    -&gt;pluck('name')\n    -&gt;sort()\n    -&gt;unique()\n    -&gt;values();\n\n\/\/ \u7279\u5b9a\u306e\u6761\u4ef6\u3067\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3057\u3066\u304b\u3089\u7279\u5b9a\u306e\u30ab\u30e9\u30e0\u3092\u62bd\u51fa\n$activeUserEmails = collect($users)\n    -&gt;where('status', 'active')\n    -&gt;pluck('email');<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-5\">3. \u30cd\u30b9\u30c8\u3057\u305f\u914d\u5217\u3067\u306e\u4f7f\u7528<\/h4>\n\n\n\n<p>\u30c9\u30c3\u30c8\u8a18\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30cd\u30b9\u30c8\u3057\u305f\u914d\u5217\u304b\u3089\u3082\u7c21\u5358\u306b\u30c7\u30fc\u30bf\u3092\u62bd\u51fa\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">$data = [\n    ['user' =&gt; ['id' =&gt; 1, 'profile' =&gt; ['city' =&gt; '\u6771\u4eac']]],\n    ['user' =&gt; ['id' =&gt; 2, 'profile' =&gt; ['city' =&gt; '\u5927\u962a']]],\n];\n\n$cities = collect($data)-&gt;pluck('user.profile.city');\n\/\/ \u7d50\u679c: ['\u6771\u4eac', '\u5927\u962a']<\/pre>\n\n\n\n<p>pluck \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u30e1\u30ea\u30c3\u30c8\u304c\u5f97\u3089\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\ud83d\ude80 \u958b\u767a\u901f\u5ea6\u306e\u5411\u4e0a<\/li>\n\n\n\n<li>\ud83d\udcdd \u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a<\/li>\n\n\n\n<li>\ud83d\udd27 \u4fdd\u5b88\u6027\u306e\u5411\u4e0a<\/li>\n\n\n\n<li>\ud83d\udcaa \u30a8\u30e9\u30fc\u306e\u5c11\u306a\u3044\u5805\u7262\u306a\u30b3\u30fc\u30c9<\/li>\n\n\n\n<li>\ud83d\udd04 \u4ed6\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\u3068\u306e\u512a\u308c\u305f\u9023\u643a<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u7279\u5fb4\u306b\u3088\u308a\u3001pluck \u30e1\u30bd\u30c3\u30c9\u306f Laravel \u958b\u767a\u8005\u306b\u3068\u3063\u3066\u5fc5\u9808\u306e\u30c4\u30fc\u30eb\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u57fa\u672c\u3092\u62bc\u3055\u3048\u305f\u3068\u3053\u308d\u3067\u3001\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u66f4\u306b\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-6\">pluck\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u6cd5<\/h2>\n\n\n\n<p>pluck\u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u3092\u7406\u89e3\u3057\u305f\u3068\u3053\u308d\u3067\u3001\u3088\u308a\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u5b9f\u52d9\u3067\u4f7f\u3048\u308b\u5177\u4f53\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30b7\u30f3\u30d7\u30eb\u306a\u30ad\u30fc\u53d6\u5f97\u304b\u3089\u30cd\u30b9\u30c8\u3057\u305f\u914d\u5217\u306e\u64cd\u4f5c\u307e\u3067<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-8\">1. \u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u5148\u306e\u30c7\u30fc\u30bf\u53d6\u5f97<\/h4>\n\n\n\n<p>Eloquent\u30e2\u30c7\u30eb\u3067\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u5148\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u5834\u5408\u3082\u3001pluck\u30e1\u30bd\u30c3\u30c9\u304c\u6d3b\u8e8d\u3057\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=\"\">\/\/ \u30e6\u30fc\u30b6\u30fc\u30e2\u30c7\u30eb\u306e\u4f8b\nclass User extends Model\n{\n    public function posts()\n    {\n        return $this-&gt;hasMany(Post::class);\n    }\n}\n\n\/\/ \u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u5148\u306e\u30bf\u30a4\u30c8\u30eb\u3092\u53d6\u5f97\n$user = User::find(1);\n$postTitles = $user-&gt;posts-&gt;pluck('title');\n\n\/\/ \u8907\u6570\u30e6\u30fc\u30b6\u30fc\u306e\u6295\u7a3f\u30bf\u30a4\u30c8\u30eb\u3092\u4e00\u5ea6\u306b\u53d6\u5f97\n$userPostTitles = User::with('posts')\n    -&gt;get()\n    -&gt;map(function ($user) {\n        return [\n            'user_name' =&gt; $user-&gt;name,\n            'post_titles' =&gt; $user-&gt;posts-&gt;pluck('title')\n        ];\n    });<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-9\">2. \u30cd\u30b9\u30c8\u3057\u305f\u30c7\u30fc\u30bf\u306e\u5909\u63db<\/h4>\n\n\n\n<p>\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3082\u3001pluck\u30e1\u30bd\u30c3\u30c9\u3067\u7c21\u5358\u306b\u64cd\u4f5c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u8907\u96d1\u306a\u30c7\u30fc\u30bf\u69cb\u9020\n$data = [\n    'categories' =&gt; [\n        ['id' =&gt; 1, 'info' =&gt; ['name' =&gt; '\u6280\u8853\u30d6\u30ed\u30b0', 'posts_count' =&gt; 10]],\n        ['id' =&gt; 2, 'info' =&gt; ['name' =&gt; '\u793e\u5185\u6587\u5316', 'posts_count' =&gt; 5]],\n    ]\n];\n\n\/\/ \u30cd\u30b9\u30c8\u3057\u305f\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\n$categoryNames = collect($data['categories'])-&gt;pluck('info.name');\n\/\/ \u7d50\u679c: ['\u6280\u8853\u30d6\u30ed\u30b0', '\u793e\u5185\u6587\u5316']<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u8907\u6570\u306e\u30ad\u30fc\u3092\u540c\u6642\u306b\u53d6\u5f97\u3059\u308b\u88cf\u6280<\/h3>\n\n\n\n<p>pluck\u30e1\u30bd\u30c3\u30c9\u3068\u4ed6\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u8907\u6570\u306e\u30ad\u30fc\u3092\u52b9\u7387\u7684\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=\"\">\/\/ \u5546\u54c1\u30c7\u30fc\u30bf\u306e\u4f8b\n$products = [\n    ['id' =&gt; 1, 'name' =&gt; '\u30d7\u30ed\u30c0\u30af\u30c8A', 'price' =&gt; 1000, 'stock' =&gt; 5],\n    ['id' =&gt; 2, 'name' =&gt; '\u30d7\u30ed\u30c0\u30af\u30c8B', 'price' =&gt; 2000, 'stock' =&gt; 3],\n];\n\n\/\/ \u8907\u6570\u306e\u30ad\u30fc\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd51\uff1amap\u3068pluck\u306e\u7d44\u307f\u5408\u308f\u305b\n$productInfo = collect($products)-&gt;map(function ($product) {\n    return [\n        'name' =&gt; $product['name'],\n        'price' =&gt; $product['price']\n    ];\n});\n\n\/\/ \u65b9\u6cd52\uff1aonly()\u3068pluck()\u306e\u7d44\u307f\u5408\u308f\u305b\n$collection = collect($products);\n$filtered = $collection-&gt;map(function ($item) {\n    return collect($item)-&gt;only(['name', 'price']);\n});<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u5e83\u304c\u308b\u53ef\u80fd\u6027<\/h3>\n\n\n\n<p>pluck\u30e1\u30bd\u30c3\u30c9\u306f\u4ed6\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30e1\u30bd\u30c3\u30c9\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u767a\u63ee\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5546\u54c1\u30c7\u30fc\u30bf\u304b\u3089\u30ab\u30c6\u30b4\u30ea\u30fc\u5225\u306e\u4fa1\u683c\u5e2f\u3092\u53d6\u5f97\n$products = [\n    ['category' =&gt; '\u96fb\u5316\u88fd\u54c1', 'items' =&gt; [\n        ['name' =&gt; '\u30c6\u30ec\u30d3', 'price' =&gt; 50000],\n        ['name' =&gt; '\u51b7\u8535\u5eab', 'price' =&gt; 80000]\n    ]],\n    ['category' =&gt; '\u5bb6\u5177', 'items' =&gt; [\n        ['name' =&gt; '\u30bd\u30d5\u30a1', 'price' =&gt; 30000],\n        ['name' =&gt; '\u30c6\u30fc\u30d6\u30eb', 'price' =&gt; 20000]\n    ]]\n];\n\n\/\/ \u30ab\u30c6\u30b4\u30ea\u30fc\u5225\u306e\u4fa1\u683c\u7bc4\u56f2\u3092\u53d6\u5f97\n$priceRanges = collect($products)-&gt;map(function ($category) {\n    return [\n        'category' =&gt; $category['category'],\n        'price_range' =&gt; [\n            'min' =&gt; collect($category['items'])-&gt;pluck('price')-&gt;min(),\n            'max' =&gt; collect($category['items'])-&gt;pluck('price')-&gt;max()\n        ]\n    ];\n});\n\n\/\/ \u7d50\u679c:\n\/\/ [\n\/\/     ['category' =&gt; '\u96fb\u5316\u88fd\u54c1', 'price_range' =&gt; ['min' =&gt; 50000, 'max' =&gt; 80000]],\n\/\/     ['category' =&gt; '\u5bb6\u5177', 'price_range' =&gt; ['min' =&gt; 20000, 'max' =&gt; 30000]]\n\/\/ ]<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-12\">\u5b9f\u8df5\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u96c6<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b0\u30eb\u30fc\u30d7\u5316\u3068\u96c6\u8a08<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u90e8\u7f72\u5225\u306e\u7d66\u4e0e\u7d71\u8a08\u3092\u53d6\u5f97\n$salaryStats = Employee::query()\n    -&gt;get()\n    -&gt;groupBy('department')\n    -&gt;map(function ($group) {\n        return [\n            'average' =&gt; $group-&gt;pluck('salary')-&gt;average(),\n            'total' =&gt; $group-&gt;pluck('salary')-&gt;sum(),\n            'count' =&gt; $group-&gt;count()\n        ];\n    });<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u306e\u6574\u5f62\u3068\u5909\u63db<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30bb\u30ec\u30af\u30c8\u30dc\u30c3\u30af\u30b9\u7528\u306e\u30c7\u30fc\u30bf\u5f62\u5f0f\u306b\u5909\u63db\n$selectOptions = User::query()\n    -&gt;where('active', true)\n    -&gt;get()\n    -&gt;pluck('name', 'id')\n    -&gt;map(function ($name, $id) {\n        return [\n            'value' =&gt; $id,\n            'label' =&gt; $name\n        ];\n    });<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u4f8b\u3092\u901a\u3058\u3066\u3001pluck\u30e1\u30bd\u30c3\u30c9\u304c\u3044\u304b\u306b\u5f37\u529b\u3067\u67d4\u8edf\u306a\u30c4\u30fc\u30eb\u3067\u3042\u308b\u304b\u304c\u304a\u5206\u304b\u308a\u3044\u305f\u3060\u3051\u305f\u304b\u3068\u601d\u3044\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u306e\u52b9\u7387\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-13\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u5927\u5316\u3059\u308bpluck\u30e1\u30bd\u30c3\u30c9\u306e\u6700\u9069\u5316\u624b\u6cd5<\/h2>\n\n\n\n<p>\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u30c7\u30fc\u30bf\u306e\u52b9\u7387\u7684\u306a\u53d6\u308a\u6271\u3044\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001pluck\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306b\u3064\u3044\u3066\u3001\u5b9f\u8df5\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u306e\u52b9\u7387\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-15\">1. \u30af\u30a8\u30ea\u30d3\u30eb\u30c0\u3067\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u306e\u30c7\u30fc\u30bf\u53d6\u5f97\u6642\u306b\u306f\u3001\u5fc5\u8981\u306a\u30ab\u30e9\u30e0\u306e\u307f\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3068\u30af\u30a8\u30ea\u5b9f\u884c\u6642\u9593\u3092\u524a\u6e1b\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=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u5168\u30ab\u30e9\u30e0\u3092\u53d6\u5f97\u3057\u3066\u304b\u3089pluck\n$userNames = User::all()-&gt;pluck('name');\n\n\/\/ \u826f\u3044\u4f8b\uff1a\u5fc5\u8981\u306a\u30ab\u30e9\u30e0\u306e\u307f\u3092\u53d6\u5f97\n$userNames = User::query()\n    -&gt;select('name')\n    -&gt;pluck('name');\n\n\/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u9055\u3044\uff081\u4e07\u30ec\u30b3\u30fc\u30c9\u306e\u5834\u5408\uff09\n\/\/ \u60aa\u3044\u4f8b\uff1a\u7d04500ms, \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u7d0410MB\n\/\/ \u826f\u3044\u4f8b\uff1a\u7d04100ms, \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u7d042MB<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-16\">2. \u30c1\u30e3\u30f3\u30af\u51e6\u7406\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u306f\u3001\u30c1\u30e3\u30f3\u30af\u51e6\u7406\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u3092\u6539\u5584\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u51e6\u7406\u65b9\u6cd5\n$chunks = [];\nUser::query()\n    -&gt;select('id', 'name')\n    -&gt;chunk(1000, function ($users) use (&amp;$chunks) {\n        $chunks[] = $users-&gt;pluck('name', 'id')-&gt;toArray();\n    });\n\n\/\/ \u30c1\u30e3\u30f3\u30af\u3054\u3068\u306e\u7d50\u679c\u3092\u7d50\u5408\n$result = collect($chunks)-&gt;collapse();<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-17\">3. \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>\u983b\u7e41\u306b\u4f7f\u7528\u3059\u308b\u7d50\u679c\u306f\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6d3b\u7528\u3057\u305f\u5b9f\u88c5\u4f8b\n$userNames = Cache::remember('user_names', 3600, function () {\n    return User::query()\n        -&gt;select('name')\n        -&gt;pluck('name')\n        -&gt;toArray();\n});<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6700\u3082\u52b9\u7387\u7684\u306a\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-19\">1. \u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u6d3b\u7528<\/h4>\n\n\n\n<p>\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u3053\u3068\u304c\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=\"\">\/\/ LazyCollection\u3092\u4f7f\u7528\u3057\u305f\u52b9\u7387\u7684\u306a\u51e6\u7406\nuse Illuminate\\Support\\LazyCollection;\n\nLazyCollection::make(function () {\n    $handle = fopen('large_data.csv', 'r');\n    while (($line = fgetcsv($handle)) !== false) {\n        yield $line;\n    }\n})\n-&gt;chunk(1000)\n-&gt;map(function ($chunk) {\n    return collect($chunk)-&gt;pluck('name');\n})\n-&gt;each(function ($names) {\n    \/\/ \u51e6\u7406\u3092\u884c\u3046\n});<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-20\">2. \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h4>\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=\"\">\/\/ \u60aa\u3044\u4f8b\uff1a\u5168\u30c7\u30fc\u30bf\u3092\u30e1\u30e2\u30ea\u306b\u4fdd\u6301\n$allData = User::with('posts')-&gt;get();\n$processedData = $allData-&gt;map(function ($user) {\n    return [\n        'user' =&gt; $user-&gt;name,\n        'posts' =&gt; $user-&gt;posts-&gt;pluck('title')\n    ];\n});\n\n\/\/ \u826f\u3044\u4f8b\uff1a\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u306e\u307f\u3092\u53d6\u5f97\n$processedData = User::query()\n    -&gt;select('id', 'name')\n    -&gt;with(['posts' =&gt; function ($query) {\n        $query-&gt;select('id', 'user_id', 'title');\n    }])\n    -&gt;get()\n    -&gt;map(function ($user) {\n        return [\n            'user' =&gt; $user-&gt;name,\n            'posts' =&gt; $user-&gt;posts-&gt;pluck('title')\n        ];\n    });<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-21\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u4e00\u89a7<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30ec\u30d9\u30eb\u3067\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5fc5\u8981\u306a\u30ab\u30e9\u30e0\u306e\u307f\u3092\u9078\u629e\u3059\u308b<\/li>\n\n\n\n<li>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3059\u308b<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u53d6\u5f97\u3092\u907f\u3051\u308b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c1\u30e3\u30f3\u30af\u51e6\u7406\u3092\u6d3b\u7528\u3059\u308b<\/li>\n\n\n\n<li>LazyCollection\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u660e\u793a\u7684\u306b\u547c\u3073\u51fa\u3059<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u983b\u7e41\u306b\u4f7f\u7528\u3059\u308b\u30c7\u30fc\u30bf\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6709\u52b9\u671f\u9650\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3059\u308b<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30bf\u30b0\u3092\u6d3b\u7528\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8a08\u6e2c\u306e\u4f8b\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=\"\">$start = microtime(true);\n$memory = memory_get_usage();\n\n\/\/ \u51e6\u7406\u5b9f\u884c\n$result = User::query()\n    -&gt;select('id', 'name')\n    -&gt;chunk(1000, function ($users) use (&amp;$processed) {\n        $processed[] = $users-&gt;pluck('name')-&gt;toArray();\n    });\n\n$timeElapsed = microtime(true) - $start;\n$memoryUsed = memory_get_usage() - $memory;\n\nLog::info(\"\u51e6\u7406\u6642\u9593: {$timeElapsed}\u79d2\");\nLog::info(\"\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf: \" . ($memoryUsed \/ 1024 \/ 1024) . \"MB\");<\/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\u3001pluck\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\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\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u5177\u4f53\u7684\u306a\u6d3b\u7528\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-22\">\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u6d3b\u304b\u305b\u308bpluck\u30e1\u30bd\u30c3\u30c9\u306e\u5fdc\u7528\u4f8b<\/h2>\n\n\n\n<p>\u5b9f\u52d9\u3067\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u958b\u767a\u306b\u304a\u3044\u3066\u3001pluck\u30e1\u30bd\u30c3\u30c9\u306f\u69d8\u3005\u306a\u5834\u9762\u3067\u6d3b\u8e8d\u3057\u307e\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u969b\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u306b\u57fa\u3065\u3044\u305f\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u7ba1\u7406\u753b\u9762\u3067\u306e\u30c7\u30fc\u30bf\u6574\u5f62\u306b\u6d3b\u7528\u3059\u308b\u624b\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-24\">1. \u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u3067\u306e\u30c7\u30fc\u30bf\u8868\u793a<\/h4>\n\n\n\n<p>\u7ba1\u7406\u753b\u9762\u3067\u3088\u304f\u5fc5\u8981\u3068\u306a\u308b\u3001\u30c7\u30fc\u30bf\u306e\u96c6\u8a08\u3068\u8868\u793a\u306e\u5b9f\u88c5\u4f8b\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=\"\">class DashboardController extends Controller\n{\n    public function index()\n    {\n        \/\/ \u90e8\u7f72\u5225\u306e\u5f93\u696d\u54e1\u6570\u3068\u5e73\u5747\u7d66\u4e0e\n        $departmentStats = Department::with('employees')\n            -&gt;get()\n            -&gt;map(function ($department) {\n                return [\n                    'name' =&gt; $department-&gt;name,\n                    'employee_count' =&gt; $department-&gt;employees-&gt;count(),\n                    'average_salary' =&gt; $department-&gt;employees-&gt;pluck('salary')-&gt;average(),\n                    'total_salary' =&gt; $department-&gt;employees-&gt;pluck('salary')-&gt;sum()\n                ];\n            });\n\n        \/\/ \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u5225\u30bf\u30b9\u30af\u6570\n        $projectStats = Project::with('tasks')\n            -&gt;get()\n            -&gt;map(function ($project) {\n                return [\n                    'name' =&gt; $project-&gt;name,\n                    'task_counts' =&gt; $project-&gt;tasks\n                        -&gt;groupBy('status')\n                        -&gt;map(function ($tasks) {\n                            return $tasks-&gt;count();\n                        })\n                ];\n            });\n\n        return view('admin.dashboard', compact('departmentStats', 'projectStats'));\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-25\">2. \u30bb\u30ec\u30af\u30c8\u30dc\u30c3\u30af\u30b9\u3084\u30d5\u30a9\u30fc\u30e0\u8981\u7d20\u306e\u52d5\u7684\u751f\u6210<\/h4>\n\n\n\n<p>\u30d5\u30a9\u30fc\u30e0\u8981\u7d20\u3067\u5fc5\u8981\u3068\u306a\u308b\u30c7\u30fc\u30bf\u6574\u5f62\u306e\u5b9f\u88c5\u4f8b\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=\"\">class FormController extends Controller\n{\n    public function create()\n    {\n        \/\/ \u30b7\u30f3\u30d7\u30eb\u306a\u30bb\u30ec\u30af\u30c8\u30dc\u30c3\u30af\u30b9\u7528\u30c7\u30fc\u30bf\n        $categories = Category::query()\n            -&gt;where('active', true)\n            -&gt;pluck('name', 'id');\n\n        \/\/ \u968e\u5c64\u5316\u3055\u308c\u305f\u30bb\u30ec\u30af\u30c8\u30dc\u30c3\u30af\u30b9\u7528\u30c7\u30fc\u30bf\n        $departments = Department::with('sections')\n            -&gt;get()\n            -&gt;map(function ($dept) {\n                return [\n                    'id' =&gt; $dept-&gt;id,\n                    'name' =&gt; $dept-&gt;name,\n                    'sections' =&gt; $dept-&gt;sections-&gt;pluck('name', 'id')\n                ];\n            });\n\n        \/\/ \u8907\u6570\u9078\u629e\u7528\u306e\u30c1\u30a7\u30c3\u30af\u30dc\u30c3\u30af\u30b9\u30c7\u30fc\u30bf\n        $skills = Skill::query()\n            -&gt;whereIn('category', ['programming', 'design'])\n            -&gt;get()\n            -&gt;groupBy('category')\n            -&gt;map(function ($skills) {\n                return $skills-&gt;pluck('name', 'id');\n            });\n\n        return view('admin.form', compact('categories', 'departments', 'skills'));\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-26\">API\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u6700\u9069\u5316\u4e8b\u4f8b<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-27\">1. REST API\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u6574\u5f62<\/h4>\n\n\n\n<p>API\u958b\u767a\u3067\u3088\u304f\u4f7f\u7528\u3059\u308b\u3001\u30c7\u30fc\u30bf\u6574\u5f62\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\u4f8b\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=\"\">class ApiController extends Controller\n{\n    public function getUserProjects(Request $request)\n    {\n        $user = $request-&gt;user();\n\n        \/\/ \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u4e00\u89a7\u306e\u53d6\u5f97\u3068\u6574\u5f62\n        $projects = $user-&gt;projects()\n            -&gt;with(['tasks', 'team.members'])\n            -&gt;get()\n            -&gt;map(function ($project) {\n                return [\n                    'id' =&gt; $project-&gt;id,\n                    'name' =&gt; $project-&gt;name,\n                    'task_count' =&gt; $project-&gt;tasks-&gt;count(),\n                    'team_members' =&gt; $project-&gt;team-&gt;members-&gt;pluck('name'),\n                    'completion_rate' =&gt; $project-&gt;tasks-&gt;whereNotNull('completed_at')\n                        -&gt;count() \/ max(1, $project-&gt;tasks-&gt;count()) * 100\n                ];\n            });\n\n        return response()-&gt;json([\n            'status' =&gt; 'success',\n            'data' =&gt; $projects\n        ]);\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-28\">2. GraphQL\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u6700\u9069\u5316<\/h4>\n\n\n\n<p>GraphQL\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306e\u5b9f\u88c5\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ProjectType extends GraphQLType\n{\n    public function resolveTeamMembersField($root, $args)\n    {\n        return $root-&gt;team-&gt;members\n            -&gt;when(isset($args['role']), function ($members) use ($args) {\n                return $members-&gt;where('role', $args['role']);\n            })\n            -&gt;pluck('name')\n            -&gt;toArray();\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-29\">\u30ec\u30dd\u30fc\u30c8\u6a5f\u80fd\u5b9f\u73fe\u6642\u306e\u6d3b\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-30\">1. CSV\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u6a5f\u80fd\u306e\u5b9f\u88c5<\/h4>\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 ReportController extends Controller\n{\n    public function exportUserActivity()\n    {\n        $headers = [\n            'Content-Type' =&gt; 'text\/csv',\n            'Content-Disposition' =&gt; 'attachment; filename=\"user_activity.csv\"'\n        ];\n\n        $users = User::with(['activities' =&gt; function ($query) {\n            $query-&gt;whereBetween('created_at', [\n                now()-&gt;subMonth(),\n                now()\n            ]);\n        }])-&gt;get();\n\n        $records = $users-&gt;map(function ($user) {\n            return [\n                'user_id' =&gt; $user-&gt;id,\n                'name' =&gt; $user-&gt;name,\n                'login_count' =&gt; $user-&gt;activities\n                    -&gt;where('type', 'login')\n                    -&gt;count(),\n                'last_actions' =&gt; $user-&gt;activities\n                    -&gt;pluck('type')\n                    -&gt;take(5)\n                    -&gt;implode(', ')\n            ];\n        });\n\n        return response()-&gt;stream(\n            function () use ($records) {\n                $file = fopen('php:\/\/output', 'w');\n                fputcsv($file, ['User ID', 'Name', 'Login Count', 'Recent Actions']);\n\n                foreach ($records as $record) {\n                    fputcsv($file, array_values($record));\n                }\n\n                fclose($file);\n            },\n            200,\n            $headers\n        );\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-31\">2. \u96c6\u8a08\u30ec\u30dd\u30fc\u30c8\u306e\u751f\u6210<\/h4>\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 AnalyticsService\n{\n    public function generateMonthlyReport()\n    {\n        $startDate = now()-&gt;startOfMonth();\n        $endDate = now()-&gt;endOfMonth();\n\n        $salesData = Order::query()\n            -&gt;whereBetween('created_at', [$startDate, $endDate])\n            -&gt;with(['items', 'customer'])\n            -&gt;get()\n            -&gt;groupBy(function ($order) {\n                return $order-&gt;created_at-&gt;format('Y-m-d');\n            })\n            -&gt;map(function ($orders) {\n                return [\n                    'total_sales' =&gt; $orders-&gt;pluck('total_amount')-&gt;sum(),\n                    'unique_customers' =&gt; $orders-&gt;pluck('customer_id')-&gt;unique()-&gt;count(),\n                    'popular_items' =&gt; $orders-&gt;pluck('items')\n                        -&gt;collapse()\n                        -&gt;groupBy('id')\n                        -&gt;map(function ($items) {\n                            return $items-&gt;count();\n                        })\n                        -&gt;sortDesc()\n                        -&gt;take(5)\n                ];\n            });\n\n        return $salesData;\n    }\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u4f8b\u306f\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3059\u3050\u306b\u6d3b\u7528\u3067\u304d\u308b\u5f62\u3067\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001pluck\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u3088\u304f\u3042\u308b\u3064\u307e\u305a\u304d\u30dd\u30a4\u30f3\u30c8\u3068\u305d\u306e\u89e3\u6c7a\u7b56\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-32\">pluck\u30e1\u30bd\u30c3\u30c9\u306e\u3088\u304f\u3042\u308b\u3064\u307e\u305a\u304d\u30dd\u30a4\u30f3\u30c8\u3068\u89e3\u6c7a\u7b56<\/h2>\n\n\n\n<p>\u5b9f\u52d9\u3067pluck\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u906d\u9047\u3057\u3084\u3059\u3044\u554f\u984c\u3068\u305d\u306e\u89e3\u6c7a\u7b56\u306b\u3064\u3044\u3066\u3001\u5177\u4f53\u7684\u306b\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-33\">NULL\u3084\u7a7a\u5024\u306e\u6271\u3044\u65b9<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-34\">1. NULL\u5024\u304c\u542b\u307e\u308c\u308b\u30c7\u30fc\u30bf\u306e\u51e6\u7406<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u554f\u984c\u306e\u3042\u308b\u30c7\u30fc\u30bf\u4f8b\n$data = [\n    ['id' =&gt; 1, 'name' =&gt; '\u30c6\u30b9\u30c81', 'email' =&gt; 'test1@example.com'],\n    ['id' =&gt; 2, 'name' =&gt; null, 'email' =&gt; 'test2@example.com'],\n    ['id' =&gt; 3, 'name' =&gt; '\u30c6\u30b9\u30c83', 'email' =&gt; null]\n];\n\n\/\/ \u554f\u984c\u306e\u3042\u308b\u5b9f\u88c5\n$names = collect($data)-&gt;pluck('name');\n\/\/ \u7d50\u679c: ['\u30c6\u30b9\u30c81', null, '\u30c6\u30b9\u30c83']\n\n\/\/ \u89e3\u6c7a\u7b561: \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3092\u4f7f\u7528\n$names = collect($data)\n    -&gt;pluck('name')\n    -&gt;filter()\n    -&gt;values();\n\/\/ \u7d50\u679c: ['\u30c6\u30b9\u30c81', '\u30c6\u30b9\u30c83']\n\n\/\/ \u89e3\u6c7a\u7b562: NULL\u5024\u3092\u4ee3\u66ff\u5024\u3067\u7f6e\u63db\n$names = collect($data)\n    -&gt;pluck('name')\n    -&gt;map(function ($name) {\n        return $name ?? '\u672a\u8a2d\u5b9a';\n    });\n\/\/ \u7d50\u679c: ['\u30c6\u30b9\u30c81', '\u672a\u8a2d\u5b9a', '\u30c6\u30b9\u30c83']<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-35\">2. \u914d\u5217\u306e\u30de\u30fc\u30b8\u3068\u91cd\u8907\u51e6\u7406<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class UserService\n{\n    public function mergeUserRoles($teams)\n    {\n        \/\/ \u554f\u984c\u306e\u3042\u308b\u5b9f\u88c5\n        $allRoles = $teams-&gt;pluck('users.*.roles.*');\n\n        \/\/ \u89e3\u6c7a\u7b56\uff1aproper \u306a\u30cd\u30b9\u30c8\u306e\u5c55\u958b\n        $allRoles = $teams-&gt;pluck('users')\n            -&gt;collapse()\n            -&gt;pluck('roles')\n            -&gt;collapse()\n            -&gt;unique('id')\n            -&gt;values();\n\n        return $allRoles;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-36\">\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u5148\u306e\u30c7\u30fc\u30bf\u53d6\u5f97\u6642\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-37\">1. N+1\u554f\u984c\u306e\u56de\u907f<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u554f\u984c\u306e\u3042\u308b\u5b9f\u88c5\uff08N+1\u554f\u984c\u304c\u767a\u751f\uff09\n$authors = Post::all()-&gt;pluck('author.name');\n\n\/\/ \u89e3\u6c7a\u7b561: Eager\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u4f7f\u7528\n$authors = Post::with('author')\n    -&gt;get()\n    -&gt;pluck('author.name');\n\n\/\/ \u89e3\u6c7a\u7b562: \u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u5148\u306e\u30ab\u30e9\u30e0\u3092\u76f4\u63a5\u53d6\u5f97\n$authors = Post::query()\n    -&gt;join('authors', 'posts.author_id', '=', 'authors.id')\n    -&gt;pluck('authors.name');<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-38\">2. \u6df1\u3044\u30cd\u30b9\u30c8\u3057\u305f\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u51e6\u7406<\/h4>\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 ProjectService\n{\n    public function getTeamLeaders($projects)\n    {\n        \/\/ \u554f\u984c\u306e\u3042\u308b\u5b9f\u88c5\n        $leaders = $projects-&gt;pluck('team.leader.name');\n\n        \/\/ \u89e3\u6c7a\u7b56\uff1aNULL\u30c1\u30a7\u30c3\u30af\u3068\u6761\u4ef6\u4ed8\u304d\u30de\u30c3\u30d4\u30f3\u30b0\n        $leaders = $projects-&gt;map(function ($project) {\n            return $project-&gt;team?-&gt;leader?-&gt;name ?? null;\n        })-&gt;filter()-&gt;values();\n\n        return $leaders;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-39\">\u578b\u5909\u63db\u306b\u95a2\u3059\u308b\u843d\u3068\u3057\u7a74\u306e\u56de\u907f\u65b9\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-40\">1. \u6570\u5024\u30c7\u30fc\u30bf\u306e\u6271\u3044<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u554f\u984c\u306e\u3042\u308b\u30c7\u30fc\u30bf\u4f8b\n$orders = [\n    ['id' =&gt; '1', 'amount' =&gt; '1000'],\n    ['id' =&gt; '2', 'amount' =&gt; '1500.50'],\n    ['id' =&gt; '3', 'amount' =&gt; null],\n    ['id' =&gt; '4', 'amount' =&gt; '']\n];\n\n\/\/ \u554f\u984c\u306e\u3042\u308b\u5b9f\u88c5\n$amounts = collect($orders)-&gt;pluck('amount');\n\n\/\/ \u89e3\u6c7a\u7b56\uff1a\u9069\u5207\u306a\u578b\u5909\u63db\u3068\u691c\u8a3c\n$amounts = collect($orders)\n    -&gt;pluck('amount')\n    -&gt;map(function ($amount) {\n        if (is_null($amount) || $amount === '') {\n            return 0;\n        }\n        return (float) $amount;\n    });\n\n\/\/ \u96c6\u8a08\u6642\u306e\u6ce8\u610f\u70b9\n$total = $amounts-&gt;sum(); \/\/ \u6b63\u3057\u3044\u5408\u8a08\u304c\u5f97\u3089\u308c\u308b<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-41\">2. \u65e5\u4ed8\u30c7\u30fc\u30bf\u306e\u51e6\u7406<\/h4>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DateHandler\n{\n    public function formatDates($records)\n    {\n        \/\/ \u554f\u984c\u306e\u3042\u308b\u5b9f\u88c5\n        $dates = $records-&gt;pluck('created_at');\n\n        \/\/ \u89e3\u6c7a\u7b56\uff1a\u9069\u5207\u306a\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u51e6\u7406\n        $dates = $records-&gt;pluck('created_at')\n            -&gt;map(function ($date) {\n                try {\n                    return $date ? Carbon::parse($date)-&gt;format('Y-m-d') : null;\n                } catch (\\Exception $e) {\n                    \\Log::warning(\"Invalid date format: {$date}\");\n                    return null;\n                }\n            })\n            -&gt;filter();\n\n        return $dates;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-42\">\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u30c8\u30e9\u30d6\u30eb\u9632\u6b62\u306e\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u306e\u4e8b\u524d\u691c\u8a3c<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   public function validateAndPluck($collection, $key)\n   {\n       \/\/ \u30ad\u30fc\u306e\u5b58\u5728\u78ba\u8a8d\n       if (!$collection-&gt;first() || !array_key_exists($key, $collection-&gt;first())) {\n           throw new \\InvalidArgumentException(\"Key {$key} does not exist in collection\");\n       }\n\n       return $collection-&gt;pluck($key);\n   }<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/strong><\/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=\"\">   public function safePluck($data, $key)\n   {\n       try {\n           $result = collect($data)-&gt;pluck($key);\n\n           if ($result-&gt;isEmpty()) {\n               \\Log::info(\"No data found for key: {$key}\");\n           }\n\n           return $result;\n       } catch (\\Exception $e) {\n           \\Log::error(\"Error while plucking data: \" . $e-&gt;getMessage());\n           return collect();\n       }\n   }<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u76e3\u8996<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   public function monitoredPluck($collection, $key)\n   {\n       $startMemory = memory_get_usage();\n       $startTime = microtime(true);\n\n       $result = $collection-&gt;pluck($key);\n\n       $memoryUsed = memory_get_usage() - $startMemory;\n       $timeElapsed = microtime(true) - $startTime;\n\n       if ($memoryUsed &gt; 1024 * 1024 * 10) { \/\/ 10MB\u4ee5\u4e0a\u4f7f\u7528\n           \\Log::warning(\"High memory usage in pluck operation: \" . \n               ($memoryUsed \/ 1024 \/ 1024) . \"MB\");\n       }\n\n       return $result;\n   }<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5bfe\u7b56\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001pluck\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u591a\u304f\u306e\u554f\u984c\u3092\u56de\u907f\u3057\u3001\u3088\u308a\u5805\u7262\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6ce8\u610f\u70b9\u3092\u5ff5\u982d\u306b\u7f6e\u304d\u306a\u304c\u3089\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u5bfe\u7b56\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":[33,12],"tags":[],"class_list":{"0":"post-2703","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-php-laravel","7":"category-php","8":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2703","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=2703"}],"version-history":[{"count":2,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2703\/revisions"}],"predecessor-version":[{"id":2705,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2703\/revisions\/2705"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2703"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}