{"id":21832,"date":"2025-11-01T15:16:47","date_gmt":"2025-11-01T15:16:47","guid":{"rendered":"https:\/\/pokecon.jp\/job\/?p=21832"},"modified":"2025-11-01T15:16:47","modified_gmt":"2025-11-01T15:16:47","slug":"rails-8-1-0%e3%81%a7%e8%bf%bd%e5%8a%a0%e3%81%95%e3%82%8c%e3%81%9fstructured-event-reporter%e3%81%ab%e3%81%a4%e3%81%84%e3%81%a6%e6%95%b4%e7%90%86%e3%81%97%e3%81%a6%e3%81%bf%e3%81%9f-zenet-tech-blog","status":"publish","type":"post","link":"https:\/\/pokecon.jp\/job\/21832\/","title":{"rendered":"Rails 8.1.0\u3067\u8ffd\u52a0\u3055\u308c\u305fStructured Event Reporter\u306b\u3064\u3044\u3066\u6574\u7406\u3057\u3066\u307f\u305f &#8211; Zenet Tech Blog"},"content":{"rendered":"\n<\/p>\n<div>\n<p><span itemscope=\"\" itemtype=\"http:\/\/schema.org\/Photograph\"><img decoding=\"async\" src=\"https:\/\/cdn-ak.f.st-hatena.com\/images\/fotolife\/z\/zenet-tech\/20251101\/20251101002723.png\" width=\"500\" height=\"266\" loading=\"lazy\" title=\"\" class=\"hatena-fotolife\" itemprop=\"image\"\/><\/span><\/p>\n<h2 id=\"\u306f\u3058\u3081\u306b\">\u306f\u3058\u3081\u306b<\/h2>\n<p>\u30bc\u30cd\u30c3\u30c8\u306e\u571f\u5c4b\u3067\u3059\u3002<br \/>\u5148\u65e5 2025\/10\/22 \u306b <strong>Rails 8.1.0<\/strong> \u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<p>\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001Rails 8.1 \u3067\u8ffd\u52a0\u3055\u308c\u305f\u6ce8\u76ee\u6a5f\u80fd <strong>Structured Event Reporter<\/strong> \u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<br \/>\n\u3053\u308c\u306f\u300cRails.logger\u300d\u3068\u300cActiveSupport::Notifications\u300d\u3092\u9032\u5316\u7684\u306b\u7d71\u5408\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u201c\u89b3\u6e2c\u6027\u201d\u3092\u5927\u304d\u304f\u9ad8\u3081\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n<hr\/>\n<h2 id=\"Structured-Event-ReporterRailsevent-\u3068\u306f\">Structured Event Reporter\uff08Rails.event\uff09 \u3068\u306f<\/h2>\n<p>\u3053\u308c\u307e\u3067 <code>Rails.logger<\/code> \u3084 <code>ActiveSupport::Notifications<\/code> \u306a\u3069\u306b\u5206\u6563\u3057\u3066\u3044\u305f\u300c\u30a4\u30d9\u30f3\u30c8\u306e\u8a18\u9332\u30fb\u76e3\u8996\u300d\u3092\u3001\u7d71\u4e00\u7684\u304b\u3064\u6a5f\u68b0\u53ef\u8aad\u306a\u5f62\u5f0f\u3067\u6271\u3048\u308b\u3088\u3046\u306b\u3057\u305f\u4ed5\u7d44\u307f\u3067\u3059\u3002<br \/>Rails \u30a4\u30d9\u30f3\u30c8\u3092\u69cb\u9020\u5316\u3057\u3066\u6271\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u30ed\u30b0\u3084\u76e3\u8996\u30b7\u30b9\u30c6\u30e0\uff08CloudWatch \u3084 Elasticsearch \u306a\u3069\uff09\u3068\u306e\u9023\u643a\u304c\u3088\u308a\u5f37\u529b\u306b\u306a\u308a\u307e\u3057\u305f\u3002<br \/>\u30bf\u30b0\u4ed8\u3051\u3084\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u8a2d\u5b9a\u306b\u3082\u5bfe\u5fdc\u3057\u3066\u304a\u308a\u3001\u5927\u898f\u6a21\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u76e3\u8996\u30fb\u30c8\u30ec\u30fc\u30b7\u30f3\u30b0\u30fb\u5206\u6790\u3092 Rails \u6a19\u6e96\u3067\u884c\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<p><iframe src=\"https:\/\/hatenablog-parts.com\/embed?url=https%3A%2F%2Fgithub.com%2Frails%2Frails%2Fissues%2F50452\" title=\"Add structured logging next to developer logging \u00b7 Issue #50452 \u00b7 rails\/rails\" class=\"embed-card embed-webcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 155px; max-width: 500px; margin: 10px 0px;\" loading=\"lazy\"><\/iframe><\/p>\n<p><iframe src=\"https:\/\/hatenablog-parts.com\/embed?url=https%3A%2F%2Fgithub.com%2Frails%2Frails%2Fcommit%2F071670b2697a21f3eae629a679f9b45b02ac1072\" title=\"Add Structured Event Reporter \u00b7 rails\/rails@071670b\" class=\"embed-card embed-webcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 155px; max-width: 500px; margin: 10px 0px;\" loading=\"lazy\"><\/iframe><\/p>\n<hr\/>\n<h2 id=\"RailsloggerActiveSupportNotificationsRailsevent-\u306e\u9055\u3044\">Rails.logger\u30fbActiveSupport::Notifications\u30fbRails.event \u306e\u9055\u3044<\/h2>\n<div class=\"s_table\"><table>\n<thead>\n<tr>\n<th> API                              <\/th>\n<th> \u76ee\u7684      <\/th>\n<th> \u51fa\u529b\u5f62\u5f0f           <\/th>\n<th> \u4e3b\u306a\u4f7f\u3044\u9053      <\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td> <strong>Rails.logger<\/strong>                 <\/td>\n<td> \u4eba\u9593\u5411\u3051\u30ed\u30b0  <\/td>\n<td> \u30c6\u30ad\u30b9\u30c8           <\/td>\n<td> \u672c\u756a\u904b\u7528\u306e\u30ed\u30b0\u76e3\u8996\u30fb\u96c6\u7d04\uff0f\u958b\u767a\u30fb\u30c7\u30d0\u30c3\u30b0 <\/td>\n<\/tr>\n<tr>\n<td> <strong>ActiveSupport::Notifications<\/strong> <\/td>\n<td> \u5185\u90e8\u8a08\u6e2c    <\/td>\n<td> \u30a4\u30d9\u30f3\u30c8           <\/td>\n<td> \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u76e3\u8996\uff0fAPM \u9023\u643a  <\/td>\n<\/tr>\n<tr>\n<td> <strong>Rails.event\uff08\u65b0\u6a5f\u80fd\uff09<\/strong>             <\/td>\n<td> \u69cb\u9020\u5316\u30a4\u30d9\u30f3\u30c8 <\/td>\n<td> JSON \u306a\u3069\u306e\u69cb\u9020\u5316\u30c7\u30fc\u30bf <\/td>\n<td> \u30ed\u30b0\u96c6\u7d04\u30fb\u89b3\u6e2c\u30fb\u76e3\u67fb\uff0f\u5206\u6563\u30c8\u30ec\u30fc\u30b7\u30f3\u30b0\u306e\u6587\u8108\u4ed8\u4e0e <\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<p>\u305d\u308c\u305e\u308c\u306e\u9055\u3044\u3092\u5b9f\u4f8b\u3067\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<hr\/>\n<h3 id=\"Railslogger\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u30ed\u30b0\u51fa\u529b\">Rails.logger\uff1a\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u30ed\u30b0\u51fa\u529b<\/h3>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\"><span class=\"synType\">Rails<\/span>.logger.info(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">User signed up: id=123, email=user@example.com<\/span><span class=\"synSpecial\">\"<\/span>)\n<\/pre>\n<p>\u51fa\u529b\u306f\u4eba\u9593\u304c\u8aad\u3080\u524d\u63d0\u306e\u30c6\u30ad\u30b9\u30c8\u5f62\u5f0f\u3067\u3059\uff08\u69cb\u9020\u3092\u6301\u305f\u306a\u3044\u305f\u3081\u5f8c\u51e6\u7406\u304c\u3057\u306b\u304f\u3044\u70b9\u306b\u6ce8\u610f\uff09\uff1a<\/p>\n<pre class=\"code\" data-lang=\"\" data-unlink=\"\">INFO -- : User signed up: id=123, email=user@example.com<\/pre>\n<p><strong>\u7279\u5fb4<\/strong><\/p>\n<ul>\n<li>\u30b7\u30f3\u30d7\u30eb\u3067\u5c0e\u5165\u3057\u3084\u3059\u3044<\/li>\n<li>\u3057\u304b\u3057\u69cb\u9020\u304c\u306a\u3044\u305f\u3081\u3001\u5206\u6790\u3084\u96c6\u8a08\u306b\u306f\u4e0d\u5411\u304d<\/li>\n<li>\u300c\u3069\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3067\u300d\u300c\u8ab0\u304c\u300d\u300c\u3044\u3064\u300d\u306a\u3069\u306e\u6587\u8108\u3092\u81ea\u52d5\u3067\u6301\u305f\u306a\u3044<\/li>\n<\/ul>\n<hr\/>\n<h3 id=\"ActiveSupportNotifications\u5185\u90e8\u30a4\u30d9\u30f3\u30c8\u306e\u767a\u706b\u3068subscribe\">ActiveSupport::Notifications\uff1a\u5185\u90e8\u30a4\u30d9\u30f3\u30c8\u306e\u767a\u706b\u3068subscribe<\/h3>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\"><span class=\"synType\">ActiveSupport<\/span>::<span class=\"synType\">Notifications<\/span>.instrument(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">user.signup<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synConstant\">id<\/span>: <span class=\"synConstant\">123<\/span>) <span class=\"synStatement\">do<\/span>\n  \n<span class=\"synStatement\">end<\/span>\n<\/pre>\n<p>subscribe \u5074\u3067\u51e6\u7406\u3092\u5b9a\u7fa9\u3067\u304d\u307e\u3059\uff1a<\/p>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\"><span class=\"synType\">ActiveSupport<\/span>::<span class=\"synType\">Notifications<\/span>.subscribe(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">user.signup<\/span><span class=\"synSpecial\">\"<\/span>) <span class=\"synStatement\">do<\/span> |name, start, finish, id, payload|\n  puts <span class=\"synSpecial\">\"#{<\/span>name<span class=\"synSpecial\">}<\/span><span class=\"synConstant\"> took <\/span><span class=\"synSpecial\">#{<\/span>(finish - start).round(<span class=\"synConstant\">3<\/span>)<span class=\"synSpecial\">}<\/span><span class=\"synConstant\">s: <\/span><span class=\"synSpecial\">#{<\/span>payload.inspect<span class=\"synSpecial\">}\"<\/span>\n<span class=\"synStatement\">end<\/span>\n<\/pre>\n<p><strong>\u7279\u5fb4<\/strong><\/p>\n<ul>\n<li>Rails \u5185\u90e8\uff08DB\u3001View\u3001Cache \u306a\u3069\uff09\u3082\u3053\u306e\u4ed5\u7d44\u307f\u3067\u901a\u77e5\u3057\u3066\u3044\u308b<\/li>\n<li>\u51e6\u7406\u6642\u9593\u306e\u8a08\u6e2c\u306a\u3069\u306b\u5f37\u3044<\/li>\n<li>\u305f\u3060\u3057\u3001<strong>\u7d71\u4e00\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u3084\u6587\u8108\u5171\u6709\u304c\u5f31\u3044<\/strong><\/li>\n<\/ul>\n<hr\/>\n<h3 id=\"Railsevent\u69cb\u9020\u5316\u30a4\u30d9\u30f3\u30c8\u3068\u3057\u3066\u7d71\u4e00\u7684\u306b\u6271\u3046\">Rails.event\uff1a\u69cb\u9020\u5316\u30a4\u30d9\u30f3\u30c8\u3068\u3057\u3066\u7d71\u4e00\u7684\u306b\u6271\u3046<\/h3>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\"><span class=\"synType\">Rails<\/span>.event.set_context(<span class=\"synConstant\">request_id<\/span>: <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">req-42<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synConstant\">user_id<\/span>: <span class=\"synConstant\">123<\/span>)\n\n<span class=\"synType\">Rails<\/span>.event.tagged(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">signup<\/span><span class=\"synSpecial\">\"<\/span>) <span class=\"synStatement\">do<\/span>\n  <span class=\"synType\">Rails<\/span>.event.notify(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">user.signup<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synConstant\">email<\/span>: <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">user@example.com<\/span><span class=\"synSpecial\">\"<\/span>)\n<span class=\"synStatement\">end<\/span>\n<\/pre>\n<p>Subscriber \u3092\u767b\u9332\u3057\u3066\u30a4\u30d9\u30f3\u30c8\u3092\u53d7\u3051\u53d6\u308a\u307e\u3059\uff1a<\/p>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\"><span class=\"synPreProc\">class<\/span> <span class=\"synType\">JsonSubscriber<\/span>\n  <span class=\"synPreProc\">def<\/span> <span class=\"synIdentifier\">emit<\/span>(event)\n    <span class=\"synType\">Rails<\/span>.logger.info(event)\n  <span class=\"synPreProc\">end<\/span>\n<span class=\"synPreProc\">end<\/span>\n\n<span class=\"synType\">Rails<\/span>.event.subscribe(<span class=\"synType\">JsonSubscriber<\/span>.new)\n<\/pre>\n<p>\u4ee5\u4e0b\u306f\u3001<code>Rails.event.notify<\/code> \u306e\u547c\u3073\u51fa\u3057\u306b\u3088\u3063\u3066\u51fa\u529b\u3055\u308c\u308b JSON \u69cb\u9020\u306e\u4e00\u4f8b\u3067\u3059\u3002<\/p>\n<pre class=\"code lang-json\" data-lang=\"json\" data-unlink=\"\"><span class=\"synSpecial\">{<\/span>\n  \"<span class=\"synStatement\">name<\/span>\": \"<span class=\"synConstant\">user.signup<\/span>\",\n  \"<span class=\"synStatement\">payload<\/span>\": <span class=\"synSpecial\">{<\/span> \"<span class=\"synStatement\">email<\/span>\": \"<span class=\"synConstant\">user@example.com<\/span>\" <span class=\"synSpecial\">}<\/span>,\n  \"<span class=\"synStatement\">tags<\/span>\": <span class=\"synSpecial\">{<\/span> \"<span class=\"synStatement\">signup<\/span>\": <span class=\"synConstant\">true<\/span> <span class=\"synSpecial\">}<\/span>,\n  \"<span class=\"synStatement\">context<\/span>\": <span class=\"synSpecial\">{<\/span> \"<span class=\"synStatement\">request_id<\/span>\": \"<span class=\"synConstant\">req-42<\/span>\", \"<span class=\"synStatement\">user_id<\/span>\": <span class=\"synConstant\">123<\/span> <span class=\"synSpecial\">}<\/span>,\n  \"<span class=\"synStatement\">timestamp<\/span>\": \"<span class=\"synConstant\">2025-10-20T12:34:56Z<\/span>\",\n  \"<span class=\"synStatement\">source_location<\/span>\": <span class=\"synSpecial\">{<\/span>\n    \"<span class=\"synStatement\">filepath<\/span>\": \"<span class=\"synConstant\">app\/controllers\/users_controller.rb<\/span>\",\n    \"<span class=\"synStatement\">lineno<\/span>\": <span class=\"synConstant\">42<\/span>\n  <span class=\"synSpecial\">}<\/span>\n<span class=\"synSpecial\">}<\/span>\n<\/pre>\n<p><strong>\u7279\u5fb4<\/strong><\/p>\n<ul>\n<li>\u5b8c\u5168\u306b\u69cb\u9020\u5316\u3055\u308c\u305f\u30a4\u30d9\u30f3\u30c8\u3068\u3057\u3066\u51fa\u529b\u53ef\u80fd<\/li>\n<li>\u30bf\u30b0\u3084\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u4ed8\u4e0e\u3057\u3066 <strong>\u30b7\u30b9\u30c6\u30e0\u6a2a\u65ad\u7684\u306a\u30c8\u30ec\u30fc\u30b9<\/strong> \u304c\u3067\u304d\u308b<\/li>\n<li>JSON \u5f62\u5f0f\u306e\u305f\u3081\u3001CloudWatch \u3084 Elasticsearch \u306a\u3069\u306b\u5bb9\u6613\u306b\u9023\u643a\u3067\u304d\u308b<\/li>\n<\/ul>\n<hr\/>\n<h2 id=\"Railsevent-\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308b\u30a4\u30d9\u30f3\u30c8\u306f\u3069\u3046\u69cb\u7bc9\u3055\u308c\u308b\u306e\u304b\">Rails.event \u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308b\uff1a\u30a4\u30d9\u30f3\u30c8\u306f\u3069\u3046\u69cb\u7bc9\u3055\u308c\u308b\u306e\u304b<\/h2>\n<p><strong>Structured Event Reporter<\/strong> \u306f\u3001\u5358\u306b\u300c\u30a4\u30d9\u30f3\u30c8\u3092\u901a\u77e5\u3059\u308b API\u300d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<br \/>\n\u5185\u90e8\u3067\u306f <strong><code>ActiveSupport::EventReporter::Event<\/code> \u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/strong> \u3092\u751f\u6210\u3057\u3001\u305d\u306e\u4e2d\u306b\u300c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u8d77\u304d\u305f\u51fa\u6765\u4e8b\u300d\u3092\u69cb\u9020\u5316\u3057\u3066\u4fdd\u6301\u3057\u307e\u3059\u3002<\/p>\n<hr\/>\n<h3 id=\"Railseventnotify-\u306e\u5185\u90e8\u3067\u4f55\u304c\u8d77\u304d\u3066\u3044\u308b\u304b\">Rails.event.notify \u306e\u5185\u90e8\u3067\u4f55\u304c\u8d77\u304d\u3066\u3044\u308b\u304b<\/h3>\n<p>\u4f8b\u3048\u3070\u3001\u6b21\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">\nbefore_action <span class=\"synStatement\">do<\/span>\n  <span class=\"synType\">Rails<\/span>.event.set_context(<span class=\"synConstant\">request_id<\/span>: <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">abc123<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synConstant\">user_id<\/span>: <span class=\"synConstant\">42<\/span>)\n<span class=\"synStatement\">end<\/span>\n\n\n<span class=\"synPreProc\">def<\/span> <span class=\"synIdentifier\">create<\/span>\n  \n  <span class=\"synType\">Rails<\/span>.event.notify(<span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">user.signup<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synConstant\">email<\/span>: <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">user@example.com<\/span><span class=\"synSpecial\">\"<\/span>)\n<span class=\"synPreProc\">end<\/span>\n<\/pre>\n<p>\u3053\u308c\u306f <strong>\u300cuser.signup \u3068\u3044\u3046\u30a4\u30d9\u30f3\u30c8\u3092\u767a\u884c\u3059\u308b\u300d<\/strong> \u3068\u3044\u3046\u64cd\u4f5c\u3092\u884c\u3044\u3001<br \/>\nRails \u5185\u90e8\u3067\u306f\u6b21\u306e\u3088\u3046\u306a <code>Event<\/code> \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">\n\n{\n  <span class=\"synConstant\">name<\/span>: <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">user.signup<\/span><span class=\"synSpecial\">\"<\/span>,                            \n  <span class=\"synConstant\">payload<\/span>: { <span class=\"synConstant\">email<\/span>: <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">user@example.com<\/span><span class=\"synSpecial\">\"<\/span> },         \n  <span class=\"synConstant\">context<\/span>: { <span class=\"synConstant\">request_id<\/span>: <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">abc123<\/span><span class=\"synSpecial\">\"<\/span>, <span class=\"synConstant\">user_id<\/span>: <span class=\"synConstant\">42<\/span> }, \n  <span class=\"synConstant\">tags<\/span>: {},                                       \n  <span class=\"synConstant\">timestamp<\/span>: <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">2025-10-20T13:55:00Z<\/span><span class=\"synSpecial\">\"<\/span>,              \n  <span class=\"synConstant\">source_location<\/span>: {\n    <span class=\"synConstant\">filepath<\/span>: <span class=\"synSpecial\">\"<\/span><span class=\"synConstant\">app\/controllers\/users_controller.rb<\/span><span class=\"synSpecial\">\"<\/span>,\n    <span class=\"synConstant\">lineno<\/span>: <span class=\"synConstant\">5<\/span>\n  }                                               \n}\n<\/pre>\n<p>\u3053\u306e\u69cb\u9020\u4f53\u306f\u3001Subscriber \u306b\u305d\u306e\u307e\u307e\u6e21\u3055\u308c\u307e\u3059\u3002<\/p>\n<hr\/>\n<h3 id=\"\u30a4\u30d9\u30f3\u30c8\u3092\u53d7\u3051\u53d6\u308bSubscriber\">\u30a4\u30d9\u30f3\u30c8\u3092\u53d7\u3051\u53d6\u308bSubscriber<\/h3>\n<pre class=\"code lang-ruby\" data-lang=\"ruby\" data-unlink=\"\">\n<span class=\"synPreProc\">class<\/span> <span class=\"synType\">JsonLogger<\/span>\n  <span class=\"synPreProc\">def<\/span> <span class=\"synIdentifier\">emit<\/span>(event)\n    <span class=\"synType\">Rails<\/span>.logger.info(event)\n  <span class=\"synPreProc\">end<\/span>\n<span class=\"synPreProc\">end<\/span>\n\n<span class=\"synType\">Rails<\/span>.event.subscribe(<span class=\"synType\">JsonLogger<\/span>.new)\n<\/pre>\n<p>\u3053\u306eSubscriber \u3092\u767b\u9332\u3057\u3066\u304a\u304f\u3068\u3001<code>notify<\/code> \u304c\u547c\u3070\u308c\u308b\u305f\u3073\u306b<br \/>\n\u4e0a\u8a18\u306e <code>event<\/code> \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c JSON \u306b\u5909\u63db\u3055\u308c\u3001\u30ed\u30b0\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n<hr\/>\n<h3 id=\"\u51fa\u529b\u7d50\u679c\u306e\u4f8b\">\u51fa\u529b\u7d50\u679c\u306e\u4f8b<\/h3>\n<pre class=\"code lang-json\" data-lang=\"json\" data-unlink=\"\"><span class=\"synSpecial\">{<\/span>\n  \"<span class=\"synStatement\">name<\/span>\": \"<span class=\"synConstant\">user.signup<\/span>\",\n  \"<span class=\"synStatement\">payload<\/span>\": <span class=\"synSpecial\">{<\/span> \"<span class=\"synStatement\">email<\/span>\": \"<span class=\"synConstant\">user@example.com<\/span>\" <span class=\"synSpecial\">}<\/span>,\n  \"<span class=\"synStatement\">context<\/span>\": <span class=\"synSpecial\">{<\/span> \"<span class=\"synStatement\">request_id<\/span>\": \"<span class=\"synConstant\">abc123<\/span>\", \"<span class=\"synStatement\">user_id<\/span>\": <span class=\"synConstant\">42<\/span> <span class=\"synSpecial\">}<\/span>,\n  \"<span class=\"synStatement\">tags<\/span>\": <span class=\"synSpecial\">{}<\/span>,\n  \"<span class=\"synStatement\">timestamp<\/span>\": \"<span class=\"synConstant\">2025-10-20T13:55:00Z<\/span>\",\n  \"<span class=\"synStatement\">source_location<\/span>\": <span class=\"synSpecial\">{<\/span>\n    \"<span class=\"synStatement\">filepath<\/span>\": \"<span class=\"synConstant\">app\/controllers\/users_controller.rb<\/span>\",\n    \"<span class=\"synStatement\">lineno<\/span>\": <span class=\"synConstant\">5<\/span>\n  <span class=\"synSpecial\">}<\/span>\n<span class=\"synSpecial\">}<\/span>\n<\/pre>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001<strong><code>notify<\/code> \u306e\u5f15\u6570\u3067\u6e21\u3057\u305f <code>email<\/code> \u3060\u3051<\/strong>\u3067\u3082\u3001<br \/>\nRails \u306f\u81ea\u52d5\u7684\u306b <code>context<\/code>\u30fb<code>timestamp<\/code>\u30fb<code>source_location<\/code> \u3092\u88dc\u5b8c\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<hr\/>\n<h3 id=\"\u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u610f\u5473\">\u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u610f\u5473<\/h3>\n<div class=\"s_table\"><table>\n<thead>\n<tr>\n<th> \u30d5\u30a3\u30fc\u30eb\u30c9\u540d            <\/th>\n<th> \u751f\u6210\u5143                            <\/th>\n<th> \u5185\u5bb9                        <\/th>\n<th> \u81ea\u52d5\uff0f\u624b\u52d5  <\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td> <code>name<\/code>            <\/td>\n<td> <code>notify<\/code> \u306e\u7b2c 1 \u5f15\u6570               <\/td>\n<td> \u30a4\u30d9\u30f3\u30c8\u540d\uff08\u4f8b: <code>\"user.signup\"<\/code>\uff09 <\/td>\n<td> \u624b\u52d5     <\/td>\n<\/tr>\n<tr>\n<td> <code>payload<\/code>         <\/td>\n<td> <code>notify<\/code> \u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u5f15\u6570              <\/td>\n<td> \u30a4\u30d9\u30f3\u30c8\u56fa\u6709\u30c7\u30fc\u30bf                 <\/td>\n<td> \u624b\u52d5     <\/td>\n<\/tr>\n<tr>\n<td> <code>context<\/code>         <\/td>\n<td> <code>Rails.event.set_context(...)<\/code> <\/td>\n<td> \u30ea\u30af\u30a8\u30b9\u30c8\u3084\u30e6\u30fc\u30b6\u30fc\u306a\u3069\u5171\u901a\u60c5\u5831          <\/td>\n<td> <strong>\u81ea\u52d5<\/strong> <\/td>\n<\/tr>\n<tr>\n<td> <code>tags<\/code>            <\/td>\n<td> <code>Rails.event.tagged(...)<\/code>      <\/td>\n<td> \u30a4\u30d9\u30f3\u30c8\u306e\u5206\u985e\uff08\u4f8b: <code>\"graphql\"<\/code>\uff09   <\/td>\n<td> \u81ea\u52d5     <\/td>\n<\/tr>\n<tr>\n<td> <code>timestamp<\/code>       <\/td>\n<td> Rails \u5185\u90e8                       <\/td>\n<td> \u30a4\u30d9\u30f3\u30c8\u767a\u706b\u6642\u523b\uff08UTC\uff09             <\/td>\n<td> <strong>\u81ea\u52d5<\/strong> <\/td>\n<\/tr>\n<tr>\n<td> <code>source_location<\/code> <\/td>\n<td> Rails \u5185\u90e8                       <\/td>\n<td> \u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\u3068\u884c\u756a\u53f7                <\/td>\n<td> <strong>\u81ea\u52d5<\/strong> <\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<hr\/>\n<h3 id=\"\u4ed5\u7d44\u307f\u3092\u307e\u3068\u3081\u308b\u3068\">\u4ed5\u7d44\u307f\u3092\u307e\u3068\u3081\u308b\u3068<\/h3>\n<pre class=\"code plaintext\" data-lang=\"plaintext\" data-unlink=\"\">notify() \u3067\u30a4\u30d9\u30f3\u30c8\u3092\u9001\u308b\n      \u2193\nActiveSupport::EventReporter::Event \u304c\u751f\u6210\u3055\u308c\u308b\n      \u2193\ncontext \/ tags \/ timestamp \/ source_location \u304c\u81ea\u52d5\u4ed8\u4e0e\u3055\u308c\u308b\n      \u2193\nSubscriber#emit \u306b\u6e21\u3055\u308c\u308b\n      \u2193\n\u30ed\u30b0\u3084\u76e3\u8996\u30c4\u30fc\u30eb\u3078\u9001\u4fe1\u3055\u308c\u308b<\/pre>\n<p>\u3053\u306e\u6d41\u308c\u306b\u3088\u308a\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5168\u4f53\u306e\u201c\u51fa\u6765\u4e8b\u201d\u3092<br \/>\n<strong>\u69cb\u9020\u5316\u3055\u308c\u305f\u4e00\u8cab\u3057\u305f\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u89b3\u6e2c<\/strong>\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<hr\/>\n<h2 id=\"\u307e\u3068\u3081\">\u307e\u3068\u3081<\/h2>\n<ul>\n<li><code>Rails.event.notify<\/code> \u306f\u300c\u540d\u524d\uff0b\u30c7\u30fc\u30bf\u300d\u3060\u3051\u3092\u6e21\u305b\u3070 OK<\/li>\n<li><code>context<\/code>\uff08\u6587\u8108\uff09\u3068 <code>timestamp<\/code>\uff08\u6642\u523b\uff09\u306f Rails \u304c\u81ea\u52d5\u3067\u88dc\u5b8c<\/li>\n<li>Subscriber \u3092\u901a\u3058\u3066\u3001\u30ed\u30b0\u30fb\u76e3\u8996\u30fb\u30c8\u30ec\u30fc\u30b9\u306a\u3069\u306b\u5bb9\u6613\u306b\u7d71\u5408\u53ef\u80fd<\/li>\n<li><strong>\u300c\u30ed\u30b0\u3092\u66f8\u304f\u300d\u3067\u306f\u306a\u304f\u300c\u30a4\u30d9\u30f3\u30c8\u3092\u767a\u884c\u3059\u308b\u300d<\/strong> \u3068\u3044\u3046\u767a\u60f3\u3078\u306e\u8ee2\u63db\u304c\u3001Rails 8.1 \u4ee5\u964d\u306e\u89b3\u6e2c\u6027\u5411\u4e0a\u306e\u9375\u3068\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/div>\n<p><script>(function(d, s, id) {\n  var js, fjs = d.getElementsByTagName(s)[0];\n  if (d.getElementById(id)) return;\n  js = d.createElement(s); js.id = id;\n  js.src = \"\/\/connect.facebook.net\/ja_JP\/sdk.js#xfbml=1&version=v17.0\";\n  fjs.parentNode.insertBefore(js, fjs);\n}(document, 'script', 'facebook-jssdk'));<\/script><br \/>\n<br \/>\n<br \/><a href=\"https:\/\/media.zenet-web.co.jp\/entry\/2025\/10\/31\/160801\">\u5143\u306e\u8a18\u4e8b\u3092\u78ba\u8a8d\u3059\u308b <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"\u306f\u3058\u3081\u306b \u30bc\u30cd\u30c3\u30c8\u306e\u571f\u5c4b\u3067\u3059\u3002\u5148\u65e5 2025\/10\/22 \u306b Rails 8.1.0 \u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u3057\u305f\u3002 \u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001Rails 8.1 \u3067\u8ffd\u52a0\u3055\u308c\u305f\u6ce8\u76ee\u6a5f\u80fd Structured Event Reporter 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class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/media.zenet-web.co.jp\\\/entry\\\/2025\\\/10\\\/31\\\/160801#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pokecon.jp\\\/job\\\/21832\\\/\"},\"author\":{\"name\":\"info@pokecon.jp\",\"@id\":\"https:\\\/\\\/pokecon.jp\\\/job\\\/#\\\/schema\\\/person\\\/16c9f07b1ba984d165d9aee259bda997\"},\"headline\":\"Rails 8.1.0\u3067\u8ffd\u52a0\u3055\u308c\u305fStructured Event Reporter\u306b\u3064\u3044\u3066\u6574\u7406\u3057\u3066\u307f\u305f &#8211; Zenet Tech 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