{"id":1528,"date":"2025-03-24T08:50:30","date_gmt":"2025-03-23T23:50:30","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1528"},"modified":"2025-03-24T08:50:30","modified_gmt":"2025-03-23T23:50:30","slug":"%e3%80%90%e4%bf%9d%e5%ad%98%e7%89%88%e3%80%91ruby%e3%81%ae%e5%87%a6%e7%90%86%e3%82%bf%e3%82%a4%e3%83%a0%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89-%e7%8f%be%e5%a0%b4%e3%81%a7%e4%bd%bf%e3%81%88","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1528","title":{"rendered":"\u3010\u4fdd\u5b58\u7248\u3011Ruby\u306e\u51e6\u7406\u30bf\u30a4\u30e0\u5b8c\u5168\u30ac\u30a4\u30c9 &#8211; \u73fe\u5834\u3067\u4f7f\u3048\u308b12\u306e\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\">Ruby \u306e\u30bf\u30a4\u30e0\u51e6\u7406\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u30bf\u30a4\u30e0\u30af\u30e9\u30b9\u3068DateTime\u30af\u30e9\u30b9\u306e\u9055\u3044\u3068\u4f7f\u3044\u65b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-5\">\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-9\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308bTime\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-10\">\u65e5\u4ed8\u306e\u52a0\u7b97\u30fb\u6e1b\u7b97\u3092\u52b9\u7387\u7684\u306b\u884c\u3046\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-13\">\u7570\u306a\u308b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u9593\u306e\u5909\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-16\">\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u306e\u6271\u3044\u65b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-20\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305f\u6642\u9593\u51e6\u7406<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-21\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u305f\u3081\u306e\u4e3b\u8981\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-24\">\u51e6\u7406\u901f\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-29\">\u3088\u304f\u3042\u308b\u30c8\u30e9\u30d6\u30eb\u3068\u89e3\u6c7a\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-30\">\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306b\u95a2\u3059\u308b\u554f\u984c\u306e\u89e3\u6c7a\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-34\">\u65e5\u4ed8\u8a08\u7b97\u306e\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u5bfe\u7b56<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-39\">\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u3076\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-40\">Rails \u3067\u306e\u30d0\u30c3\u30c1\u51e6\u7406\u306b\u304a\u3051\u308b\u6642\u523b\u51e6\u7406<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-43\">\u5927\u91cf\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u6700\u9069\u5316\u624b\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\">Ruby \u306e\u30bf\u30a4\u30e0\u51e6\u7406\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<p>Ruby\u3067\u306e\u6642\u9593\u51e6\u7406\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u57fa\u790e\u3092\u3057\u3063\u304b\u308a\u3068\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u30bf\u30a4\u30e0\u30af\u30e9\u30b9\u3068DateTime\u30af\u30e9\u30b9\u306e\u9055\u3044\u3068\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-2\">Time \u30af\u30e9\u30b9<\/h4>\n\n\n\n<p>Time\u30af\u30e9\u30b9\u306fUnix\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u57fa\u306b\u3057\u305f\u6642\u9593\u3092\u6271\u3046\u30af\u30e9\u30b9\u3067\u3059\u30021970\u5e74\u4ee5\u964d\u306e\u6642\u9593\u3092\u6271\u3046\u5834\u5408\u306b\u6700\u9069\u3067\u3001\u9ad8\u7cbe\u5ea6\u306a\u6642\u9593\u8a08\u7b97\u304c\u53ef\u80fd\u3067\u3059\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=\"\"># \u73fe\u5728\u6642\u523b\u306e\u53d6\u5f97\ncurrent_time = Time.now\nputs current_time  # =&gt; 2024-12-09 10:30:45 +0900\n\n# \u7279\u5b9a\u306e\u6642\u523b\u306e\u4f5c\u6210\nspecific_time = Time.new(2024, 12, 9, 10, 30, 45)\nputs specific_time  # =&gt; 2024-12-09 10:30:45 +0900\n\n# \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u306e\u53d6\u5f97\ntimestamp = current_time.to_i\nputs timestamp  # =&gt; 1702085445<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-3\">DateTime \u30af\u30e9\u30b9<\/h4>\n\n\n\n<p>DateTime\u30af\u30e9\u30b9\u306f\u6b74\u53f2\u7684\u306a\u65e5\u4ed8\u3084\u6642\u523b\u3092\u6271\u3046\u969b\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u30b0\u30ec\u30b4\u30ea\u30aa\u66a6\u3078\u306e\u5bfe\u5fdc\u3084\u3001\u3088\u308a\u8907\u96d1\u306a\u65e5\u4ed8\u8a08\u7b97\u304c\u53ef\u80fd\u3067\u3059\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=\"\">require 'date'\n\n# \u73fe\u5728\u306e\u65e5\u6642\u306e\u53d6\u5f97\ncurrent_datetime = DateTime.now\nputs current_datetime  # =&gt; 2024-12-09T10:30:45+09:00\n\n# \u7279\u5b9a\u306e\u65e5\u6642\u306e\u4f5c\u6210\nspecific_datetime = DateTime.new(2024, 12, 9, 10, 30, 45, '+9')\nputs specific_datetime  # =&gt; 2024-12-09T10:30:45+09:00\n\n# \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u3067\u306e\u51fa\u529b\nputs specific_datetime.strftime('%Y\u5e74%m\u6708%d\u65e5 %H\u6642%M\u5206%S\u79d2')  \n# =&gt; 2024\u5e7412\u670809\u65e5 10\u664230\u520645\u79d2<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-4\">\u4f7f\u3044\u5206\u3051\u306e\u6307\u91dd<\/h4>\n\n\n<div id=\"id-1ac10e96-5c9e-4dfb-9dea-6e2c88cdf4d2\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7528\u9014<\/th><th>\u63a8\u5968\u30af\u30e9\u30b9<\/th><th>\u7406\u7531<\/th><\/tr><\/thead><tbody><tr><td>\u73fe\u4ee3\u306e\u65e5\u6642\u51e6\u7406<\/td><td>Time<\/td><td>\u9ad8\u901f\u3067\u76f4\u611f\u7684\u306a\u64cd\u4f5c\u304c\u53ef\u80fd<\/td><\/tr><tr><td>\u30b7\u30b9\u30c6\u30e0\u30ed\u30b0\u8a18\u9332<\/td><td>Time<\/td><td>Unix\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3068\u306e\u76f8\u6027\u304c\u826f\u3044<\/td><\/tr><tr><td>\u6b74\u53f2\u7684\u306a\u65e5\u4ed8\u51e6\u7406<\/td><td>DateTime<\/td><td>BC\/AD \u306e\u65e5\u4ed8\u3082\u6271\u3048\u308b<\/td><\/tr><tr><td>\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u8907\u96d1\u306a\u51e6\u7406<\/td><td>DateTime<\/td><td>\u3088\u308a\u67d4\u8edf\u306a\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u51e6\u7406\u304c\u53ef\u80fd<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u9069\u5207\u306a\u51e6\u7406\u306f\u3001\u56fd\u969b\u7684\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u4e0a\u3067\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-6\">\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u8a2d\u5b9a<\/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=\"\"># \u30b7\u30b9\u30c6\u30e0\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u78ba\u8a8d\nputs Time.now.zone  # =&gt; JST\n\n# \u7279\u5b9a\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u3067\u306e\u6642\u523b\u4f5c\u6210\nrequire 'time'\ntime_in_utc = Time.now.utc\nputs time_in_utc  # =&gt; 2024-12-09 01:30:45 UTC\n\n# \u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u5909\u63db\ntime_in_jst = time_in_utc.getlocal(\"+09:00\")\nputs time_in_jst  # =&gt; 2024-12-09 10:30:45 +0900<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-7\">Rails\u74b0\u5883\u3067\u306e\u8a2d\u5b9a<\/h4>\n\n\n\n<p>Rails \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>config\/application.rb<\/code> \u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a2d\u5b9a\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=\"\"># \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u8a2d\u5b9a\nconfig.time_zone = 'Tokyo'\n\n# \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u6642\u523b\u3092UTC\u3067\u4fdd\u5b58\nconfig.active_record.default_timezone = :utc<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-8\">\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u95a2\u9023\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>UTC \u3067\u306e\u4fdd\u5b58<\/strong>: \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u306f\u5e38\u306bUTC\u3067\u6642\u523b\u3092\u4fdd\u5b58\u3059\u308b<\/li>\n\n\n\n<li><strong>\u8868\u793a\u6642\u306b\u5909\u63db<\/strong>: \u30e6\u30fc\u30b6\u30fc\u3078\u306e\u8868\u793a\u6642\u306b\u9069\u5207\u306a\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306b\u5909\u63db\u3059\u308b<\/li>\n\n\n\n<li><strong>\u660e\u793a\u7684\u306a\u6307\u5b9a<\/strong>: \u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306f\u5e38\u306b\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b<\/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=\"\"># \u63a8\u5968\u3055\u308c\u308b\u65b9\u6cd5\nTime.current  # Rails \u306e\u5834\u5408\nTime.now.in_time_zone('Tokyo')  # \u660e\u793a\u7684\u306a\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u6307\u5b9a\n\n# \u975e\u63a8\u5968\u306e\u65b9\u6cd5\nTime.now  # \u30b7\u30b9\u30c6\u30e0\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306b\u4f9d\u5b58<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u57fa\u790e\u77e5\u8b58\u3092\u62bc\u3055\u3048\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30bf\u30a4\u30e0\u51e6\u7406\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u77e5\u8b58\u3092\u6d3b\u7528\u3057\u305f\u5b9f\u8df5\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-9\">\u5b9f\u52d9\u3067\u4f7f\u3048\u308bTime\u64cd\u4f5c\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<p>\u5b9f\u52d9\u3067\u306eRuby\u306b\u3088\u308b\u6642\u9593\u51e6\u7406\u3067\u306f\u3001\u5358\u7d14\u306a\u6642\u523b\u306e\u53d6\u5f97\u3060\u3051\u3067\u306a\u304f\u3001\u69d8\u3005\u306a\u64cd\u4f5c\u3084\u5909\u63db\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u5b9f\u8df5\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-10\">\u65e5\u4ed8\u306e\u52a0\u7b97\u30fb\u6e1b\u7b97\u3092\u52b9\u7387\u7684\u306b\u884c\u3046\u65b9\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-11\">\u57fa\u672c\u7684\u306a\u65e5\u4ed8\u8a08\u7b97<\/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=\"\">time = Time.now\n\n# \u65e5\u6570\u306e\u52a0\u7b97\ntomorrow = time + (24 * 60 * 60)  # 1\u65e5\u5f8c\nnext_week = time + (7 * 24 * 60 * 60)  # 1\u9031\u9593\u5f8c\n\n# \u3088\u308a\u8aad\u307f\u3084\u3059\u3044\u65b9\u6cd5\uff08ActiveSupport\u4f7f\u7528\u6642\uff09\ntomorrow = time + 1.day\nnext_week = time + 1.week<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-12\">\u55b6\u696d\u65e5\u306e\u8a08\u7b97<\/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=\"\">require 'active_support\/all'\n\ndef next_business_day(date)\n  date += 1.day\n  # \u571f\u65e5\u306e\u5834\u5408\u306f\u6b21\u306e\u5e73\u65e5\u307e\u3067\u9032\u3081\u308b\n  date += 1.day while date.saturday? || date.sunday?\n  date\nend\n\n# \u4f7f\u7528\u4f8b\ntoday = Time.current\nnext_work_day = next_business_day(today)<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u7570\u306a\u308b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u9593\u306e\u5909\u63db\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-14\">\u6587\u5b57\u5217\u3068Time\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u76f8\u4e92\u5909\u63db<\/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=\"\"># \u6587\u5b57\u5217\u304b\u3089Time\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u5909\u63db\ntime_str = \"2024-12-09 10:30:45\"\ntime_obj = Time.parse(time_str)  # =&gt; 2024-12-09 10:30:45 +0900\n\n# \u3088\u308a\u53b3\u5bc6\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u306b\u3088\u308b\u5909\u63db\nspecific_format = \"%Y-%m-%d %H:%M:%S\"\ntime_obj = Time.strptime(time_str, specific_format)\n\n# Time\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089\u6587\u5b57\u5217\u3078\u306e\u5909\u63db\nformatted_time = time_obj.strftime(\"%Y\u5e74%m\u6708%d\u65e5 %H\u6642%M\u5206%S\u79d2\")<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-15\">\u56fd\u969b\u5316\u5bfe\u5fdc<\/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=\"\">require 'i18n'\n\nI18n.locale = :ja\ntime = Time.current\n\n# \u9577\u3044\u5f62\u5f0f\nputs I18n.l(time, format: :long)  # =&gt; 2024\u5e7412\u67089\u65e5(\u6708) 10\u664230\u520645\u79d2 JST\n\n# \u77ed\u3044\u5f62\u5f0f\nputs I18n.l(time, format: :short)  # =&gt; 12\/09 10:30<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u306e\u6271\u3044\u65b9<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-17\">Unix\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u306e\u5909\u63db<\/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=\"\"># \u73fe\u5728\u306eUnix\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u53d6\u5f97\ntimestamp = Time.now.to_i  # =&gt; 1702085445\n\n# \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u304b\u3089Time\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\ntime = Time.at(timestamp)\n\n# \u30df\u30ea\u79d2\u5358\u4f4d\u306e\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u51e6\u7406\ntimestamp_ms = (Time.now.to_f * 1000).to_i\ntime_from_ms = Time.at(timestamp_ms \/ 1000.0)<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-18\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3067\u306e\u6d3b\u7528<\/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 Event &lt; ApplicationRecord\n  # \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u4eba\u9593\u304c\u8aad\u3081\u308b\u5f62\u5f0f\u306b\u5909\u63db\n  def formatted_created_at\n    created_at.strftime(\"%Y-%m-%d %H:%M:%S\")\n  end\n\n  # \u7279\u5b9a\u306e\u671f\u9593\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u53d6\u5f97\n  scope :recent, -&gt; { where('created_at &gt; ?', 24.hours.ago) }\n  scope :between_dates, -&gt;(start_date, end_date) {\n    where(created_at: start_date.beginning_of_day..end_date.end_of_day)\n  }\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-19\">\u5b9f\u88c5\u6642\u306e\u6ce8\u610f\u70b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u8003\u616e<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u306fUTC\u3067\u4fdd\u5b58<\/li>\n\n\n\n<li>\u8868\u793a\u6642\u306b\u9069\u5207\u306a\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306b\u5909\u63db<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7cbe\u5ea6\u306e\u7dad\u6301<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30df\u30ea\u79d2\u5358\u4f4d\u306e\u7cbe\u5ea6\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u8a08\u7b97\u6642\u306e\u4e38\u3081\u8aa4\u5dee\u306b\u6ce8\u610f<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u8003\u616e<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u306f\u30d0\u30c3\u30c1\u51e6\u7406\u3092\u691c\u8a0e<\/li>\n\n\n\n<li>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u9069\u5207\u306a\u8a2d\u5b9a<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u5b9f\u8df5\u7684\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30bf\u30a4\u30e0\u51e6\u7406\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305f\u5b9f\u88c5\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-20\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u610f\u8b58\u3057\u305f\u6642\u9593\u51e6\u7406<\/h2>\n\n\n\n<p>\u6642\u9593\u51e6\u7406\u306f\u591a\u304f\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u983b\u7e41\u306b\u884c\u308f\u308c\u308b\u64cd\u4f5c\u3067\u3042\u308a\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u52b9\u7387\u7684\u306a\u6642\u9593\u51e6\u7406\u306e\u5b9f\u88c5\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6291\u3048\u308b\u305f\u3081\u306e\u4e3b\u8981\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-22\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u518d\u5229\u7528<\/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=\"\"># \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u60aa\u3044\u5b9f\u88c5\ndef process_dates(dates)\n  dates.map { |date_str| Time.parse(date_str) }  # \u65b0\u3057\u3044Time\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5927\u91cf\u751f\u6210\nend\n\n# \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u5b9f\u88c5\ndef process_dates(dates)\n  time_parser = Time.method(:parse)  # \u30d1\u30fc\u30b9\u30e1\u30bd\u30c3\u30c9\u3092\u4e00\u5ea6\u3060\u3051\u53d6\u5f97\n  dates.map(&amp;time_parser)  # \u30e1\u30bd\u30c3\u30c9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u518d\u5229\u7528\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-23\">\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=\"\">require 'date'\n\nclass TimeProcessor\n  # \u30d5\u30e9\u30a4\u30a6\u30a7\u30a4\u30c8\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\n  @cache = {}\n\n  def self.get_time(year, month, day)\n    key = \"#{year}-#{month}-#{day}\"\n    @cache[key] ||= Time.new(year, month, day)\n  end\n\n  # \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30af\u30ea\u30a2\uff08\u5fc5\u8981\u306b\u5fdc\u3058\u3066\uff09\n  def self.clear_cache\n    @cache.clear\n  end\nend\n\n# \u4f7f\u7528\u4f8b\n100.times do\n  time = TimeProcessor.get_time(2024, 12, 9)  # \u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u518d\u5229\u7528\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-24\">\u51e6\u7406\u901f\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-25\">\u52b9\u7387\u7684\u306a\u6bd4\u8f03\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=\"\"># \u975e\u52b9\u7387\u306a\u5b9f\u88c5\ndef within_last_week?(time)\n  (Time.now - 7.days) &lt;= time &amp;&amp; time &lt;= Time.now  # Time.now\u304c\u8907\u6570\u56de\u547c\u3070\u308c\u308b\nend\n\n# \u52b9\u7387\u7684\u306a\u5b9f\u88c5\ndef within_last_week?(time)\n  now = Time.now  # \u4e00\u5ea6\u3060\u3051\u8a08\u7b97\n  (now - 7.days) &lt;= time &amp;&amp; time &lt;= now\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-26\">\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u306e\u6700\u9069\u5316<\/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 Event &lt; ApplicationRecord\n  # \u975e\u52b9\u7387\u306a\u30d0\u30c3\u30c1\u51e6\u7406\n  def self.update_all_timestamps\n    find_each do |event|\n      event.update(processed_at: Time.current)  # \u500b\u5225\u306eSQL\u304c\u767a\u884c\u3055\u308c\u308b\n    end\n  end\n\n  # \u52b9\u7387\u7684\u306a\u30d0\u30c3\u30c1\u51e6\u7406\n  def self.update_all_timestamps\n    current_time = Time.current\n    where(processed_at: nil).update_all(processed_at: current_time)  # \u4e00\u62ec\u66f4\u65b0\n  end\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-27\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584\u306e\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6642\u523b\u306e\u6bd4\u8f03\u6700\u9069\u5316<\/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=\"\">   # \u63a8\u5968\u3055\u308c\u308b\u5b9f\u88c5\n   def compare_times(time1, time2)\n     time1.to_i &lt;=&gt; time2.to_i  # Unix\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3067\u306e\u6bd4\u8f03\u304c\u9ad8\u901f\n   end<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u6d3b\u7528<\/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=\"\">   class CreateEvents &lt; ActiveRecord::Migration[7.0]\n     def change\n       create_table :events do |t|\n         t.datetime :occurred_at\n         t.index :occurred_at  # \u6642\u523b\u3067\u306e\u691c\u7d22\u3092\u9ad8\u901f\u5316\n       end\n     end\n   end<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u6642\u9593\u7bc4\u56f2\u306e\u52b9\u7387\u7684\u306a\u51e6\u7406<\/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=\"\">   class Event &lt; ApplicationRecord\n     scope :in_range, -&gt;(start_time, end_time) {\n       # BETWEEN\u53e5\u3092\u4f7f\u7528\u3057\u305f\u52b9\u7387\u7684\u306a\u30af\u30a8\u30ea\n       where(occurred_at: start_time..end_time)\n     }\n   end<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-28\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0<\/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=\"\">require 'benchmark'\n\ndef measure_time_operations\n  Benchmark.bm do |x|\n    x.report(\"parse:\") { 1000.times { Time.parse(\"2024-12-09 10:30:45\") } }\n    x.report(\"create:\") { 1000.times { Time.new(2024, 12, 9, 10, 30, 45) } }\n    x.report(\"now:\") { 1000.times { Time.now } }\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u3067\u9ad8\u901f\u306a\u6642\u9593\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u969b\u306e\u958b\u767a\u3067\u906d\u9047\u3057\u3084\u3059\u3044\u30c8\u30e9\u30d6\u30eb\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-29\">\u3088\u304f\u3042\u308b\u30c8\u30e9\u30d6\u30eb\u3068\u89e3\u6c7a\u65b9\u6cd5<\/h2>\n\n\n\n<p>\u6642\u9593\u51e6\u7406\u306b\u95a2\u9023\u3059\u308b\u554f\u984c\u306f\u3001\u591a\u304f\u306e\u958b\u767a\u8005\u304c\u76f4\u9762\u3059\u308b\u4e00\u822c\u7684\u306a\u8ab2\u984c\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u30c8\u30e9\u30d6\u30eb\u3068\u305d\u306e\u5177\u4f53\u7684\u306a\u89e3\u6c7a\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-30\">\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306b\u95a2\u3059\u308b\u554f\u984c\u306e\u89e3\u6c7a\u65b9\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-31\">\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u4e0d\u6574\u5408<\/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\u30b3\u30fc\u30c9\ndef user_login_time\n  user.last_login_at  # DB\u304b\u3089\u53d6\u5f97\u3057\u305f\u6642\u523b\u304cUTC\u306e\u307e\u307e\nend\n\n# \u89e3\u6c7a\u7b56\ndef user_login_time\n  user.last_login_at.in_time_zone(user.timezone)  # \u30e6\u30fc\u30b6\u30fc\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306b\u5909\u63db\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-32\">\u4e00\u8cab\u6027\u306e\u306a\u3044\u6642\u523b\u8868\u793a<\/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\nclass Event &lt; ApplicationRecord\n  def start_time_display\n    start_time.strftime('%Y-%m-%d %H:%M:%S')  # \u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u60c5\u5831\u304c\u6b20\u843d\n  end\nend\n\n# \u6539\u5584\u3055\u308c\u305f\u5b9f\u88c5\nclass Event &lt; ApplicationRecord\n  def start_time_display\n    I18n.l(start_time.in_time_zone(Time.zone), format: :long)\n  end\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-33\">\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u81ea\u52d5\u5909\u63db\u8a2d\u5b9a<\/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=\"\"># config\/application.rb \u3067\u306e\u6b63\u3057\u3044\u8a2d\u5b9a\nconfig.time_zone = 'Tokyo'\nconfig.active_record.default_timezone = :utc\n\n# \u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u4e00\u8cab\u6027\u3092\u4fdd\u3064\u305f\u3081\u306e\u30d8\u30eb\u30d1\u30fc\u30e1\u30bd\u30c3\u30c9\nmodule TimeZoneHelper\n  def with_user_timezone\n    Time.use_zone(current_user.timezone) { yield }\n  end\nend<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-34\">\u65e5\u4ed8\u8a08\u7b97\u306e\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9\u5bfe\u7b56<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-35\">\u6708\u672b\u306e\u65e5\u4ed8\u8a08\u7b97<\/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\u30b3\u30fc\u30c9\ndef next_month_date(date)\n  date + 1.month  # 5\/31 \u2192 6\/31 \u3068\u306a\u308a\u554f\u984c\u767a\u751f\nend\n\n# \u89e3\u6c7a\u7b56\ndef next_month_date(date)\n  date.next_month.end_of_month.min(date.next_month)\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-36\">\u590f\u6642\u9593\u306e\u5bfe\u5fdc<\/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=\"\">def handle_daylight_savings(time)\n  zone = TZInfo::Timezone.get('America\/New_York')\n\n  # \u590f\u6642\u9593\u306e\u5909\u66f4\u3092\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\n  local_time = zone.local_to_utc(time)\n\n  # \u590f\u6642\u9593\u306e\u5883\u754c\u3092\u307e\u305f\u3050\u5834\u5408\u306e\u51e6\u7406\n  if zone.period_for_local(time).dst?\n    puts \"\u590f\u6642\u9593\u304c\u9069\u7528\u3055\u308c\u3066\u3044\u307e\u3059\"\n  end\n\n  local_time\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-37\">\u3088\u304f\u3042\u308b\u554f\u984c\u3068\u305d\u306e\u5bfe\u7b56<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6642\u523b\u306e\u6bd4\u8f03\u554f\u984c<\/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=\"\"># \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\ndef same_time?(time1, time2)\n  time1 == time2  # \u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u304c\u7570\u306a\u308b\u3068 false \u306b\u306a\u308b\u53ef\u80fd\u6027\nend\n\n# \u89e3\u6c7a\u7b56\ndef same_time?(time1, time2)\n  time1.utc == time2.utc  # UTC\u3067\u6bd4\u8f03\nend<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u7bc4\u56f2\u6307\u5b9a\u306e\u554f\u984c<\/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=\"\"># \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\ndef today_records\n  Record.where(created_at: Date.today)  # \u6642\u523b\u90e8\u5206\u304c\u8003\u616e\u3055\u308c\u3066\u3044\u306a\u3044\nend\n\n# \u89e3\u6c7a\u7b56\ndef today_records\n  Record.where(created_at: Time.current.all_day)\nend<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30c7\u30fc\u30bf\u6c38\u7d9a\u5316\u306e\u554f\u984c<\/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=\"\"># \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\ndef save_timestamp\n  self.executed_at = Time.now  # \u30b7\u30b9\u30c6\u30e0\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306b\u4f9d\u5b58\nend\n\n# \u89e3\u6c7a\u7b56\ndef save_timestamp\n  self.executed_at = Time.current  # Rails\u306e\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u8a2d\u5b9a\u306b\u5f93\u3046\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-38\">\u30c7\u30d0\u30c3\u30b0\u306e\u305f\u3081\u306e\u30d8\u30eb\u30d1\u30fc\u30e1\u30bd\u30c3\u30c9<\/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=\"\">module TimeDebugHelper\n  def debug_time_info(time)\n    {\n      original: time,\n      utc: time.utc,\n      zone: time.zone,\n      timestamp: time.to_i,\n      dst: time.dst?,\n      timezone_offset: time.utc_offset\n    }\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u554f\u984c\u306b\u5bfe\u3059\u308b\u9069\u5207\u306a\u5bfe\u51e6\u65b9\u6cd5\u3092\u7406\u89e3\u3057\u3001\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u6642\u9593\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u77e5\u8b58\u3092\u6d3b\u7528\u3057\u305f\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-39\">\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u3076\u5fdc\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<p>\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u306f\u3001\u57fa\u672c\u7684\u306a\u6642\u9593\u51e6\u7406\u306b\u52a0\u3048\u3066\u3001\u3088\u308a\u8907\u96d1\u306a\u8981\u4ef6\u306b\u5bfe\u5fdc\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u5b9f\u8df5\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u306b\u57fa\u3065\u3044\u305f\u30b3\u30fc\u30c9\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-40\">Rails \u3067\u306e\u30d0\u30c3\u30c1\u51e6\u7406\u306b\u304a\u3051\u308b\u6642\u523b\u51e6\u7406<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-41\">\u5b9a\u671f\u5b9f\u884c\u30d0\u30c3\u30c1\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=\"\"># app\/jobs\/daily_report_job.rb\nclass DailyReportJob &lt; ApplicationJob\n  queue_as :default\n\n  def perform\n    # \u65e5\u6b21\u30d0\u30c3\u30c1\u306e\u51e6\u7406\u6642\u9593\u5e2f\u3092\u8a2d\u5b9a\n    processing_time = Time.current.beginning_of_day\n\n    # \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u51e6\u7406\n    ActiveRecord::Base.transaction do\n      # \u524d\u65e5\u306e\u30c7\u30fc\u30bf\u3092\u96c6\u8a08\n      results = aggregate_previous_day_data(processing_time)\n\n      # \u30ec\u30dd\u30fc\u30c8\u306e\u4f5c\u6210\u3068\u4fdd\u5b58\n      save_daily_report(results, processing_time)\n    end\n  end\n\n  private\n\n  def aggregate_previous_day_data(processing_time)\n    start_time = processing_time - 1.day\n    end_time = processing_time\n\n    Event.where(created_at: start_time..end_time)\n         .group('DATE(created_at)')\n         .select('DATE(created_at) as date, COUNT(*) as count')\n  end\n\n  def save_daily_report(results, processing_time)\n    DailyReport.create!(\n      target_date: processing_time.to_date,\n      data: results.to_json,\n      processed_at: Time.current\n    )\n  end\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-42\">\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u7ba1\u7406\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=\"\"># config\/initializers\/scheduler.rb\nrequire 'rufus-scheduler'\n\nscheduler = Rufus::Scheduler.new\n\nscheduler.cron '0 1 * * *' do # \u6bce\u65e5\u5348\u524d1\u6642\u306b\u5b9f\u884c\n  Rails.logger.info \"Daily report job started at #{Time.current}\"\n  DailyReportJob.perform_later\nend\n\n# \u30b8\u30e7\u30d6\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\nscheduler.stderr = Rails.logger<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-43\">\u5927\u91cf\u30c7\u30fc\u30bf\u51e6\u7406\u3067\u306e\u6700\u9069\u5316\u624b\u6cd5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-44\">\u30d0\u30c3\u30c1\u51e6\u7406\u306e\u52b9\u7387\u5316<\/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 BatchProcessor\n  def self.process_large_dataset\n    start_time = Time.current\n    processed_count = 0\n\n    # \u4e00\u62ec\u51e6\u7406\u7528\u306e\u30af\u30a8\u30ea\u30d3\u30eb\u30c0\u30fc\n    Event.find_each(batch_size: 1000) do |event|\n      begin\n        process_single_event(event)\n        processed_count += 1\n      rescue =&gt; e\n        Rails.logger.error(\"Error processing event #{event.id}: #{e.message}\")\n      end\n    end\n\n    execution_time = Time.current - start_time\n\n    {\n      processed_count: processed_count,\n      execution_time: execution_time,\n      records_per_second: processed_count \/ execution_time\n    }\n  end\n\n  private\n\n  def self.process_single_event(event)\n    # \u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u306e\u30ed\u30b8\u30c3\u30af\n    event.with_lock do\n      event.processed_at = Time.current\n      event.status = 'processed'\n      event.save!\n    end\n  end\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-45\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\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=\"\">class TimeRangeProcessor\n  # \u65e5\u4ed8\u7bc4\u56f2\u3067\u306e\u30af\u30a8\u30ea\u3092\u6700\u9069\u5316\n  def self.optimize_date_range_query(start_date, end_date)\n    # \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6d3b\u7528\u3059\u308b\u30af\u30a8\u30ea\n    Event.where(created_at: start_date.beginning_of_day..end_date.end_of_day)\n         .includes(:user)  # N+1\u554f\u984c\u306e\u56de\u907f\n         .find_each(batch_size: 1000) do |event|\n      yield event if block_given?\n    end\n  end\n\n  # \u4e26\u5217\u51e6\u7406\u306e\u5b9f\u88c5\n  def self.parallel_process(date_ranges)\n    results = Parallel.map(date_ranges, in_processes: 4) do |range|\n      process_date_range(range)\n    end\n\n    aggregate_results(results)\n  end\n\n  private\n\n  def self.process_date_range(range)\n    {\n      start_date: range.first,\n      end_date: range.last,\n      processed_count: Event.where(created_at: range).count\n    }\n  end\nend<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-46\">\u5b9f\u88c5\u4f8b\uff1a\u4e88\u7d04\u30b7\u30b9\u30c6\u30e0\u306e\u6642\u9593\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 Reservation &lt; ApplicationRecord\n  validates :start_time, presence: true\n  validates :end_time, presence: true\n  validate :end_time_after_start_time\n  validate :no_overlap_with_existing_reservations\n\n  scope :upcoming, -&gt; { where('start_time &gt; ?', Time.current) }\n  scope :ongoing, -&gt; { \n    where('start_time &lt;= ? AND end_time &gt;= ?', Time.current, Time.current) \n  }\n\n  def duration\n    ((end_time - start_time) \/ 1.hour).round(2)\n  end\n\n  private\n\n  def end_time_after_start_time\n    return unless start_time &amp;&amp; end_time\n\n    if end_time &lt;= start_time\n      errors.add(:end_time, \"must be after start time\")\n    end\n  end\n\n  def no_overlap_with_existing_reservations\n    overlapping_reservations = Reservation\n      .where.not(id: id)\n      .where('(start_time, end_time) OVERLAPS (?, ?)', start_time, end_time)\n\n    if overlapping_reservations.exists?\n      errors.add(:base, \"Overlaps with existing reservation\")\n    end\n  end\nend<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u306f\u3001\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u76f4\u9762\u3059\u308b\u69d8\u3005\u306a\u8ab2\u984c\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u306e\u53c2\u8003\u3068\u306a\u308a\u307e\u3059\u3002\u9069\u5207\u306a\u6642\u9593\u51e6\u7406\u306e\u5b9f\u88c5\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4fe1\u983c\u6027\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u91cd\u8981\u306a\u8981\u7d20\u3068\u306a\u308a\u307e\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":[3],"tags":[],"class_list":{"0":"post-1528","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-ruby","7":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1528","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=1528"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1528\/revisions"}],"predecessor-version":[{"id":1529,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1528\/revisions\/1529"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1528"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1528"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}