{"id":40177,"date":"2025-10-13T07:34:49","date_gmt":"2025-10-13T07:34:49","guid":{"rendered":"https:\/\/www.railscarma.com\/?p=40177"},"modified":"2025-10-13T07:34:52","modified_gmt":"2025-10-13T07:34:52","slug":"how-to-raise-and-rescue-exceptions-in-ruby","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/how-to-raise-and-rescue-exceptions-in-ruby\/","title":{"rendered":"Ruby\u3067\u4f8b\u5916\u3092\u767a\u751f\u30fb\u89e3\u9664\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"40177\" class=\"elementor elementor-40177\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-feaac73 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"feaac73\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-57be5f1\" data-id=\"57be5f1\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f81e029 elementor-widget elementor-widget-text-editor\" data-id=\"f81e029\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">\u4f8b\u5916\u306fRuby\u3067\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u57fa\u672c\u7684\u306a\u90e8\u5206\u3067\u3042\u308a\u3001\u958b\u767a\u8005\u306f\u30a8\u30e9\u30fc\u3092\u512a\u96c5\u306b\u51e6\u7406\u3057\u3001\u5805\u7262\u3067\u8010\u969c\u5bb3\u6027\u306e\u9ad8\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u4fdd\u8a3c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Ruby\u306e\u4f8b\u5916\u51e6\u7406\u6a5f\u69cb\u306f\u76f4\u611f\u7684\u3067\u3042\u308a\u306a\u304c\u3089\u5f37\u529b\u3067\u3042\u308a\u3001\u958b\u767a\u8005\u306f\u4f55\u304b\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u3068\u304d\u306b\u30a8\u30e9\u30fc\u3092\u767a\u751f\u3055\u305b\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30af\u30e9\u30c3\u30b7\u30e5\u3092\u9632\u3050\u305f\u3081\u306b\u30a8\u30e9\u30fc\u3092\u6551\u6e08\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e2000\u8a9e\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001Ruby\u3067\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u3001\u305d\u308c\u3092\u6551\u6e08\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3001\u57fa\u672c\u304b\u3089\u9ad8\u5ea6\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3001\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3001\u5b9f\u4f8b\u307e\u3067\u3092\u7db2\u7f85\u3057\u306a\u304c\u3089\u89e3\u8aac\u3057\u307e\u3059\u3002<\/span><\/p><h3><strong>Ruby\u306e\u4f8b\u5916\u3068\u306f\uff1f<\/strong><\/h3><p>Ruby\u306b\u304a\u3051\u308b\u4f8b\u5916\u3068\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5b9f\u884c\u4e2d\u306e\u30a8\u30e9\u30fc\u3084\u4e88\u671f\u305b\u306c\u72b6\u6cc1\u3092\u8868\u3059\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308b\u3002\u30bc\u30ed\u3067\u9664\u7b97\u3057\u3088\u3046\u3068\u3057\u305f\u3001\u5b58\u5728\u3057\u306a\u3044\u30d5\u30a1\u30a4\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u969c\u5bb3\u304c\u767a\u751f\u3057\u305f\u3001\u306a\u3069\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3068\u3001Ruby\u306f\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u308b\u3002\u4f8b\u5916\u304c\u51e6\u7406\u3055\u308c\u306a\u3044\u3068\u3001\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3068\u3068\u3082\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u7d42\u4e86\u3057\u307e\u3059\u3002<\/p><p>Ruby\u306e\u4f8b\u5916\u30b7\u30b9\u30c6\u30e0\u306f <code>\u4f8b\u5916<\/code> \u30af\u30e9\u30b9\u306f\u4f8b\u5916\u968e\u5c64\u306e\u30eb\u30fc\u30c8\u3068\u306a\u308b\u3002\u306e\u3088\u3046\u306a\u30b5\u30d6\u30af\u30e9\u30b9\u306f <code>\u6a19\u6e96\u30a8\u30e9\u30fc\uff08StandardError\uff09\u3001\u5b9f\u884c\u6642\u30a8\u30e9\u30fc\uff08RuntimeError\uff09\u3001\u5f15\u6570\u30a8\u30e9\u30fc\uff08ArgumentError<\/code>\u3001 \u305d\u3057\u3066 <code>\u30e1\u30bd\u30c3\u30c9\u30a8\u30e9\u30fc<\/code> \u306f\u7279\u5b9a\u306e\u30bf\u30a4\u30d7\u306e\u30a8\u30e9\u30fc\u3092\u51e6\u7406\u3059\u308b\u3002\u958b\u767a\u8005\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u56fa\u6709\u306e\u30a8\u30e9\u30fc\u3092\u8868\u3059\u305f\u3081\u306b\u3001\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u3002<\/p><p>Ruby\u306e\u4f8b\u5916\u51e6\u7406\u306f\u30012\u3064\u306e\u91cd\u8981\u306a\u52d5\u4f5c\u3092\u4e2d\u5fc3\u306b\u5c55\u958b\u3055\u308c\u308b\uff1a<\/p><ul><li><strong>\u80b2\u6210<\/strong>:\u30a8\u30e9\u30fc\u767a\u751f\u6642\u306b\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u308b\u3002<\/li><li><strong>\u6551\u51fa<\/strong>:\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30af\u30e9\u30c3\u30b7\u30e5\u3092\u9632\u3050\u305f\u3081\u306e\u4f8b\u5916\u306e\u30ad\u30e3\u30c3\u30c1\u3068\u51e6\u7406\u3002<\/li><\/ul><p>\u305d\u308c\u3067\u306f\u3001\u4f8b\u5916\u3092\u52b9\u679c\u7684\u306b\u767a\u751f\u3055\u305b\u3001\u6551\u6e08\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3088\u3046\u3002<\/p><h3><strong>Ruby\u3067\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u308b<\/strong><\/h3><p>\u4f8b\u5916\u306e\u767a\u751f\u306f\u3001\u30a8\u30e9\u30fc\u3084\u4e88\u671f\u305b\u306c\u72b6\u614b\u304c\u767a\u751f\u3057\u305f\u3053\u3068\u3092\u77e5\u3089\u305b\u308b\u51e6\u7406\u3067\u3042\u308b\u3002Ruby\u3067\u306f <code>\u30ec\u30a4\u30ba<\/code> \u30e1\u30bd\u30c3\u30c9\uff08\u304a\u3088\u3073\u305d\u306e\u30a8\u30a4\u30ea\u30a2\u30b9 <code>\u5931\u6557<\/code>)\u3092\u4f7f\u3063\u3066\u4f8b\u5916\u3092\u5f15\u304d\u8d77\u3053\u3059\u3002<\/p><h4><strong>\u306b\u3064\u3044\u3066 <\/strong><code>\u30ec\u30a4\u30ba<\/code><strong> \u65b9\u6cd5<\/strong><\/h4><p>\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u308b\u6700\u3082\u7c21\u5358\u306a\u65b9\u6cd5\u306f <code>\u30ec\u30a4\u30ba<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u5f15\u6570\u306a\u3057\u3067\u5b9f\u884c\u3059\u308b\u3068 <code>\u30e9\u30f3\u30bf\u30a4\u30e0\u30a8\u30e9\u30fc<\/code> (\u306e\u30b5\u30d6\u30af\u30e9\u30b9\uff09\u3002 <code>\u6a19\u6e96\u30a8\u30e9\u30fc<\/code>):<\/p><pre>\u30eb\u30d3\u30fc\n\u30ec\u30a4\u30ba\n# =&gt; RuntimeError: \u51e6\u7406\u3055\u308c\u306a\u3044\u4f8b\u5916<\/pre><p>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8868\u793a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\uff1a<\/p><pre>\u30eb\u30d3\u30fc\nraise \"\u4f55\u304b\u304a\u304b\u3057\u3044\uff01\"\n# =&gt; RuntimeError\uff1a\u4f55\u304b\u554f\u984c\u304c\u767a\u751f\u3057\u307e\u3057\u305f\uff01<\/pre><p>\u7279\u5b9a\u306e\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u767a\u751f\u3055\u305b\u308b\u306b\u306f\u3001\u7b2c1\u5f15\u6570\u306b\u305d\u306e\u30af\u30e9\u30b9\u3001\u7b2c2\u5f15\u6570\u306b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u6e21\u3059\uff1a<\/p><pre>\u30eb\u30d3\u30fc\nraise ArgumentError, \"\u7121\u52b9\u306a\u5165\u529b\u304c\u63d0\u4f9b\u3055\u308c\u307e\u3057\u305f\"\n# =&gt; ArgumentError\uff1a\u7121\u52b9\u306a\u5165\u529b\u304c\u63d0\u4f9b\u3055\u308c\u307e\u3057\u305f<\/pre><h3><strong>\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u30af\u30e9\u30b9<\/strong><\/h3><p>\u3088\u308a\u8907\u96d1\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u7279\u5b9a\u306e\u30a8\u30e9\u30fc\u3092\u8868\u3059\u305f\u3081\u306b\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u306f <code>\u6a19\u6e96\u30a8\u30e9\u30fc<\/code> \u307e\u305f\u306f\u305d\u306e\u30b5\u30d6\u30af\u30e9\u30b9\u306e1\u3064\u3092\u4f7f\u3063\u3066\u3001Ruby\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30ec\u30b9\u30ad\u30e5\u30fc\u52d5\u4f5c\u3068\u306e\u4e92\u63db\u6027\u3092\u78ba\u4fdd\u3057\u3066\u3044\u308b\u3002<\/p><p>\u4f8b\uff1a<\/p><pre>\u30eb\u30d3\u30fc\nclass AuthenticationError  AuthenticationError\uff1a\u7121\u52b9\u306a\u8a8d\u8a3c\u60c5\u5831<\/pre><p>\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066 <code>\u8a8d\u8a3c\u30a8\u30e9\u30fc<\/code>\u8a8d\u8a3c\u95a2\u9023\u306e\u30a8\u30e9\u30fc\u306f\u3001\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u3068\u306f\u5225\u306b\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p><h3><strong>\u539f\u56e0\u306b\u3088\u308b\u4f8b\u5916\u306e\u767a\u751f<\/strong><\/h3><p>Ruby\u3067\u306f\u4f8b\u5916\u306b\u300c\u539f\u56e0\u300d\u3092\u4ed8\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u30c7\u30d0\u30c3\u30b0\u306b\u4fbf\u5229\u3067\u3042\u308b\u3002\u539f\u56e0\u3068\u306f\u3001\u73fe\u5728\u306e\u4f8b\u5916\u306e\u539f\u56e0\u3068\u306a\u3063\u305f\u5143\u306e\u4f8b\u5916\u306e\u3053\u3068\u3067\u3042\u308b\u3002\u4f8b\u5916\u306b <code>\u4f8b\u5916<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30a2\u30af\u30bb\u30b9\u3059\u308b\uff1a<\/p><pre>\u30eb\u30d3\u30fc\n\u958b\u59cb\n  raise \"\u30aa\u30ea\u30b8\u30ca\u30eb\u30a8\u30e9\u30fc\"\nrescue =&gt; e\n  raise \"\u65b0\u3057\u3044\u30a8\u30e9\u30fc\" # \u5143\u306e\u30a8\u30e9\u30fc\u304c\u539f\u56e0\u3068\u3057\u3066\u4fdd\u5b58\u3055\u308c\u308b\n\u7d42\u4e86<\/pre><p>\u3067\u539f\u56e0\u3092\u8abf\u3079\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002 <code>e.\u539f\u56e0<\/code>:<\/p><pre>\u30eb\u30d3\u30fc\n\u958b\u59cb\n  \u958b\u59cb\n    raise \"\u30aa\u30ea\u30b8\u30ca\u30eb\u30a8\u30e9\u30fc\"\n  rescue =&gt; e\n    raise \"\u65b0\u3057\u3044\u30a8\u30e9\u30fc\"\n  end\nrescue =&gt; e\n  puts e.message # =&gt; \u65b0\u3057\u3044\u30a8\u30e9\u30fc\n  puts e.cause.message # =&gt; \u5143\u306e\u30a8\u30e9\u30fc\nend<\/pre><h3><strong>\u4f8b\u5916\u306e\u6551\u51fa<\/strong><\/h3><p>\u4f8b\u5916\u306e\u6551\u6e08\u306b\u3088\u3063\u3066\u3001\u30a8\u30e9\u30fc\u3092\u30ad\u30e3\u30c3\u30c1\u3057\u3066\u512a\u96c5\u306b\u51e6\u7406\u3057\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u30af\u30e9\u30c3\u30b7\u30e5\u3059\u308b\u306e\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u308b\u3002Ruby\u3067\u306f <code>\u958b\u59cb\/\u6551\u51fa<\/code> \u30d6\u30ed\u30c3\u30af\u3067\u4f8b\u5916\u3092\u7ba1\u7406\u3059\u308b\u3002<\/p><h4><strong>\u306b\u3064\u3044\u3066 <\/strong><code>\u59cb\u3081\u308b<\/code><strong>\/<\/strong><code>\u30ec\u30b9\u30ad\u30e5\u30fc<\/code><strong> \u30d6\u30ed\u30c3\u30af<\/strong><\/h4><p>\u306e\u57fa\u672c\u69cb\u9020 <code>\u958b\u59cb\/\u6551\u51fa<\/code> \u30d6\u30ed\u30c3\u30af\u3067\u3042\u308b\uff1a<\/p><pre>\u30eb\u30d3\u30fc\n\u958b\u59cb\n  # \u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u30b3\u30fc\u30c9\n\u30ec\u30b9\u30ad\u30e5\u30fc\n  \u4f8b\u5916\u3092\u51e6\u7406\u3059\u308b\n\u7d42\u4e86<\/pre><p><strong>\u4f8b\uff1a<\/strong><\/p><pre>\u30eb\u30d3\u30fc\n\u958b\u59cb\n  \u7d50\u679c = 10 \/ 0\n\u30ec\u30b9\u30ad\u30e5\u30fc\n  puts \"\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\uff01\"\n\u7d42\u4e86\n#\u51fa\u529b\uff1a\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\uff01<\/pre><p>\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3001 <code>\u30ec\u30b9\u30ad\u30e5\u30fc<\/code> \u30ad\u30e3\u30c3\u30c1 <code>\u6a19\u6e96\u30a8\u30e9\u30fc<\/code> \u3068\u305d\u306e\u30b5\u30d6\u30af\u30e9\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002 <code>rescue StandardError<\/code>.<\/p><h3><strong>\u7279\u5b9a\u306e\u4f8b\u5916\u306e\u51e6\u7406<\/strong><\/h3><p>\u7279\u5b9a\u306e\u4f8b\u5916\u3092\u51e6\u7406\u3059\u308b\u306b\u306f\u3001\u4f8b\u5916\u30af\u30e9\u30b9\u3092 <code>\u30ec\u30b9\u30ad\u30e5\u30fc<\/code> \u6761\u9805<\/p><pre>\u30eb\u30d3\u30fc\n\u958b\u59cb\n  \u7d50\u679c = 10 \/ 0\nrescue \u30bc\u30ed\u9664\u7b97\u30a8\u30e9\u30fc\n  puts \"\u30bc\u30ed\u3067\u5272\u308a\u5207\u308c\u306a\u3044\uff01\"\nrescue \u5f15\u6570\u30a8\u30e9\u30fc\n  puts \"\u7121\u52b9\u306a\u5f15\u6570\u304c\u6307\u5b9a\u3055\u308c\u307e\u3057\u305f!\"\n\u7d42\u4e86\n# \u51fa\u529b\uff1a\u30bc\u30ed\u3067\u9664\u7b97\u3067\u304d\u307e\u305b\u3093\uff01<\/pre><p>\u3055\u3089\u306b\u8abf\u3079\u308b\u305f\u3081\u306b\u4f8b\u5916\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u308b\uff1a<\/p><pre>\u30eb\u30d3\u30fc\n\u958b\u59cb\n  raise ArgumentError, \"\u7121\u52b9\u306a\u5165\u529b\"\nrescue ArgumentError =&gt; e\n  puts \"\u30a8\u30e9\u30fc\uff1a#{e.message}\"\nend\n#\u51fa\u529b\uff1a\u30a8\u30e9\u30fc\uff1a\u7121\u52b9\u306a\u5165\u529b<\/pre><h3><strong>\u4f7f\u7528\u3059\u308b <\/strong><code>\u305d\u308c\u4ee5\u5916<\/code><strong> \u305d\u3057\u3066 <\/strong><code>\u78ba\u4fdd\u3059\u308b<\/code><\/h3><p>Ruby\u3067\u306f\u3001\u4f8b\u5916\u51e6\u7406\u306e\u305f\u3081\u306b2\u3064\u306e\u8ffd\u52a0\u53e5\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u308b\uff1a<\/p><ul><li><code>\u305d\u308c\u4ee5\u5916<\/code>:\u4f8b\u5916\u304c\u767a\u751f\u3057\u306a\u3051\u308c\u3070\u5b9f\u884c\u3055\u308c\u308b\u3002<\/li><li><code>\u78ba\u4fdd\u3059\u308b<\/code>:\u4f8b\u5916\u306e\u767a\u751f\u306b\u95a2\u4fc2\u306a\u304f\u5b9f\u884c\u3055\u308c\u308b\u3002<\/li><\/ul><p>\u4f8b\uff1a<\/p><pre>\u30eb\u30d3\u30fc\n\u958b\u59cb\n  puts \"\u51e6\u7406\u3092\u5b9f\u884c\u4e2d...\"\n  result = 10 \/ 2\nrescue \u30bc\u30ed\u9664\u7b97\u30a8\u30e9\u30fc\n  puts \"\u30bc\u30ed\u3067\u9664\u7b97\u3067\u304d\u307e\u305b\u3093\uff01\"\nelse\n  puts \"\u64cd\u4f5c\u306b\u6210\u529f\u3057\u307e\u3057\u305f\uff1a#{result}\"\n\u78ba\u4fdd\n  puts \"\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7...\"\n\u7d42\u4e86\n# \u51fa\u529b\uff1a\n# \u64cd\u4f5c\u306e\u5b9f\u884c\u4e2d...\n# \u64cd\u4f5c\u306b\u6210\u529f\u3057\u307e\u3057\u305f\uff1a5\n# \u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u4e2d<\/pre><p>\u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u5834\u5408<\/p><pre>\u30eb\u30d3\u30fc\n\u958b\u59cb\n  puts \"\u51e6\u7406\u3092\u5b9f\u884c\u4e2d...\"\n  result = 10 \/ 0\nrescue \u30bc\u30ed\u9664\u7b97\u30a8\u30e9\u30fc\n  puts \"\u30bc\u30ed\u3067\u9664\u7b97\u3067\u304d\u307e\u305b\u3093\uff01\"\nelse\n  puts \"\u64cd\u4f5c\u306b\u6210\u529f\u3057\u307e\u3057\u305f\uff1a#{result}\"\n\u78ba\u4fdd\n  puts \"\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7...\"\n\u7d42\u4e86\n# \u51fa\u529b\uff1a\n# \u6f14\u7b97\u4e2d...\n# \u30bc\u30ed\u306b\u3088\u308b\u9664\u7b97\u304c\u3067\u304d\u307e\u305b\u3093\uff01\n# \u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u4e2d...<\/pre><h3><strong>\u306b\u3064\u3044\u3066 <\/strong><code>\u30ea\u30c8\u30e9\u30a4<\/code><strong> \u30ad\u30fc\u30ef\u30fc\u30c9<\/strong><\/h3><p>\u306b\u3064\u3044\u3066 <code>\u30ea\u30c8\u30e9\u30a4<\/code> \u30ad\u30fc\u30ef\u30fc\u30c9\u306f <code>\u59cb\u3081\u308b<\/code> \u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u3002\u3053\u308c\u306f\u3001\u5931\u6557\u3057\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30fb\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u518d\u8a66\u884c\u3059\u308b\u3088\u3046\u306a\u5834\u5408\u306b\u4fbf\u5229\u3067\u3042\u308b\u3002<\/p><p>\u4f8b\uff1a<\/p><pre>\u30eb\u30d3\u30fc\n\u8a66\u884c\u56de\u6570 = 0\n\u958b\u59cb\n  \u8a66\u884c\u56de\u6570 += 1\n  puts \"\u8a66\u884c\u56de\u6570#{\u8a66\u884c\u56de\u6570}\"\n  raise \"\u63a5\u7d9a\u306b\u5931\u6557\u3057\u307e\u3057\u305f\"\n\u30ec\u30b9\u30ad\u30e5\u30fc\n  \u30ea\u30c8\u30e9\u30a4 if attempts &lt; 3\n  puts &quot;#{attempts}\u56de\u8a66\u884c\u3057\u305f\u6642\u70b9\u3067\u30ae\u30d6\u30a2\u30c3\u30d7&quot;\n\u7d42\u4e86\n#\u306e\u51fa\u529b\uff1a\n# \u8a66\u884c 1\n# \u8a66\u884c 2\n# \u8a66\u884c 3\n# 3\u56de\u8a66\u884c\u3057\u3066\u3042\u304d\u3089\u3081\u308b<\/pre><p>\u7121\u9650\u30eb\u30fc\u30d7\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u30ea\u30c8\u30e9\u30a4\u306f\u614e\u91cd\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3002<\/p><h3><strong>\u4f8b\u5916\u51e6\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong><\/h3><ol><li><strong>\u30ec\u30b9\u30ad\u30e5\u30fc\u7279\u6709\u306e\u4f8b\u5916<\/strong>:\u3080\u304d\u51fa\u3057\u306f\u907f\u3051\u308b <code>\u30ec\u30b9\u30ad\u30e5\u30fc<\/code> \u7bc0\u304c\u3042\u308b\u3002 <code>\u6a19\u6e96\u30a8\u30e9\u30fc<\/code> \u30b5\u30d6\u30af\u30e9\u30b9\u306f\u3001\u4e88\u671f\u3057\u306a\u3044\u30a8\u30e9\u30fc\u3092\u96a0\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u671f\u5f85\u3059\u308b\u4f8b\u5916\u3092\u6b63\u78ba\u306b\u6307\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002<pre>\u30eb\u30d3\u30fc\n# \u60aa\u3044\n\u958b\u59cb\n  #\u30b3\u30fc\u30c9\n\u30ec\u30b9\u30ad\u30e5\u30fc\n  # \u5168\u3066\u3092\u30ad\u30e3\u30c3\u30c1\n\u7d42\u4e86\n\n# \u30b0\u30c3\u30c9\n\u958b\u59cb\n  # \u30b3\u30fc\u30c9\nrescue ArgumentError, TypeError\n  # \u7279\u5b9a\u306e\u30a8\u30e9\u30fc\u3092\u51e6\u7406\n\u7d42\u4e86<\/pre><\/li><li><strong>\u30ec\u30b9\u30ad\u30e5\u30fc\u30d6\u30ed\u30c3\u30af\u306f\u5c0f\u3055\u304f<\/strong>:\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u30b3\u30fc\u30c9\u3060\u3051\u3092\u30e9\u30c3\u30d7\u3059\u308b\u3002\u3053\u308c\u306f\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u3001\u7121\u95a2\u4fc2\u306a\u30a8\u30e9\u30fc\u3092\u30ad\u30e3\u30c3\u30c1\u3059\u308b\u306e\u3092\u9632\u3050\u3002<\/li><li><strong>\u610f\u5473\u306e\u3042\u308b\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u63d0\u4f9b<\/strong>:\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u308b\u3068\u304d\u306f\u3001\u30c7\u30d0\u30c3\u30b0\u3092\u52a9\u3051\u308b\u305f\u3081\u306b\u3001\u660e\u78ba\u3067\u5b9f\u7528\u7684\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u542b\u3081\u308b\u3002<\/li><li><strong>\u30c9\u30e1\u30a4\u30f3\u30fb\u30ed\u30b8\u30c3\u30af\u306b\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u3092\u4f7f\u7528\u3059\u308b<\/strong>:\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u56fa\u6709\u306e\u30a8\u30e9\u30fc\u306b\u5bfe\u5fdc\u3059\u308b\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3001\u30b3\u30fc\u30c9\u306e\u8868\u73fe\u529b\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u307e\u3059\u3002<\/li><li><strong>\u30d5\u30ed\u30fc\u5236\u5fa1\u306e\u305f\u3081\u306b\u4f8b\u5916\u3092\u4f7f\u3044\u3059\u304e\u306a\u3044<\/strong>:\u4f8b\u5916\u306f\u4f8b\u5916\u7684\u306a\u30b1\u30fc\u30b9\u306e\u305f\u3081\u306e\u3082\u306e\u3067\u3042\u308a\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u6d41\u308c\u3092\u5236\u5fa1\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u306f\u306a\u3044\u3002\u60f3\u5b9a\u3055\u308c\u308b\u30b7\u30ca\u30ea\u30aa\u306b\u306f\u6761\u4ef6\u5f0f\u3092\u4f7f\u3046\u3002<pre>\u30eb\u30d3\u30fc\n# \u60aa\u3044\n\u958b\u59cb\n\u5024 = hash[:key]\n\u30ec\u30b9\u30ad\u30e5\u30fc\n\u5024 = nil\n\u7d42\u4e86\n\n# \u826f\u3044\n\u5024 = \u30cf\u30c3\u30b7\u30e5[:\u30ad\u30fc] || nil<\/pre><\/li><li><strong>\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u30fb\u30ea\u30bd\u30fc\u30b9 <\/strong><code>\u78ba\u4fdd\u3059\u308b<\/code>:\u7528\u9014 <code>\u78ba\u4fdd\u3059\u308b<\/code> \u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3067\u3082\u3001\u30d5\u30a1\u30a4\u30eb\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3001\u305d\u306e\u4ed6\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u30af\u30ed\u30fc\u30ba\u3057\u307e\u3059\u3002<\/li><\/ol><h3><strong>\u5b9f\u4f8b<\/strong><\/h3><h4><strong>\u30d5\u30a1\u30a4\u30eb\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/strong><\/h4><p>\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u3080\u3068\u3001\u6b21\u306e\u3088\u3046\u306a\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u3002 <code>Errno::ENOENT<\/code> (\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\uff09\u307e\u305f\u306f <code>Errno::EACCES<\/code> (\u8a31\u53ef\u306f\u62d2\u5426\u3055\u308c\u307e\u3057\u305f\uff09\u3002\u4ee5\u4e0b\u306f\u305d\u306e\u5bfe\u51e6\u6cd5\u3067\u3042\u308b\uff1a<\/p><pre>\u30eb\u30d3\u30fc\n\u958b\u59cb\n  File.open(\"nonexistent.txt\", \"r\") do |file|.\n    puts file.read\n  \u7d42\u4e86\nrescue Errno::ENOENT\n  puts \"\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\uff01\"\nrescue Errno::EACCES\n  puts \"\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u304c\u62d2\u5426\u3055\u308c\u307e\u3057\u305f!\"\nensure\n  puts \"\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u5b8c\u4e86\u3002\"\n\u7d42\u4e86\n#\u51fa\u529b\uff1a\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\uff01\n# \u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u5b8c\u4e86\u3002<\/pre><h4><strong>API\u30b3\u30fc\u30eb<\/strong><\/h4><p>HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u884c\u3046\u3068\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30e9\u30fc\u3084\u7121\u52b9\u306a\u30ec\u30b9\u30dd\u30f3\u30b9\u306b\u906d\u9047\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u3088\u3046\u306a\u5834\u5408\u306f <code>http\u30d1\u30fc\u30c6\u30a3\u30fc<\/code> \u5b9d\u77f3\u3060\uff1a<\/p><pre>\u30eb\u30d3\u30fc\nhttparty' \u3092\u5fc5\u8981\u3068\u3059\u308b\u3002\n\n\u958b\u59cb\n  \u30ec\u30b9\u30dd\u30f3\u30b9 = HTTParty.get('https:\/\/api.example.com\/data')\nrescue HTTParty::Error =&gt; e\n  puts \"API\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u5931\u6557\u3057\u307e\u3057\u305f: #{e.message}\"\nrescue SocketError\n  puts \"\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30e9\u30fc\u3067\u3059\uff1a\u30b5\u30fc\u30d0\u30fc\u306b\u63a5\u7d9a\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002\nelse\n  puts \"\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u53d7\u4fe1\u3057\u307e\u3057\u305f\uff1a#{\u30ec\u30b9\u30dd\u30f3\u30b9.\u30dc\u30c7\u30a3}\"\n\u7d42\u4e86<\/pre><h4><strong>\u30af\u30e9\u30b9\u5185\u3067\u306e\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u51e6\u7406<\/strong><\/h4><p>\u4ee5\u4e0b\u306f\u3001\u652f\u6255\u3044\u3092\u51e6\u7406\u3057\u3001\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u3092\u4f7f\u7528\u3059\u308b\u30af\u30e9\u30b9\u306e\u4f8b\u3067\u3059\uff1a<\/p><pre>\u30eb\u30d3\u30fc\nclass PaymentError &lt; StandardError; end\nclass InsufficientFundsError &lt; \u652f\u6255\u3044\u30a8\u30e9\u30fc; end\nclass InvalidCardError  card.balance\n    card.balance -= amount\n    puts \"#{\u91d1\u984d}\u306e\u652f\u6255\u3044\u304c\u6b63\u5e38\u306b\u51e6\u7406\u3055\u308c\u307e\u3057\u305f\"\n  \u7d42\u4e86\n\n  \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\n  def valid_card?(card)\n    card.number.length == 16\n  \u7d42\u4e86\n\u30a8\u30f3\u30c9\n\n\u30af\u30e9\u30b9 Card\n  attr_accessor :number, :balance\n  def initialize(number, balance)\n    \u756a\u53f7 = \u756a\u53f7\n    \u6b8b\u9ad8 = \u6b8b\u9ad8\n  \u7d42\u4e86\n\u7d42\u4e86\n\n\u30ab\u30fc\u30c9 = Card.new(\"1234567890123456\", 50)\n\u30d7\u30ed\u30bb\u30c3\u30b5\u30fc = PaymentProcessor.new\n\n\u958b\u59cb\n  processor.process_payment(100, card)\nrescue InsufficientFundsError =&gt; e\n  puts \"\u30a8\u30e9\u30fc\uff1a#{e.message}\"\nrescue InvalidCardError =&gt; e\n  puts \"\u30a8\u30e9\u30fc\uff1a#{e.message}\"\n\u7d42\u4e86\n# \u51fa\u529b\uff1a\u30a8\u30e9\u30fc\uff1a\u8cc7\u91d1\u4e0d\u8db3<\/pre><h3><strong>\u9ad8\u5ea6\u306a\u4f8b\u5916\u51e6\u7406<\/strong><\/h3><h4><strong>\u30cd\u30b9\u30c8\u30fb\u30ec\u30b9\u30ad\u30e5\u30fc<\/strong><\/h4><p>\u5165\u308c\u5b50\u306b\u3067\u304d\u308b <code>\u958b\u59cb\/\u6551\u51fa<\/code> \u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u3063\u3066\u3001\u3055\u307e\u3056\u307e\u306a\u30ec\u30d9\u30eb\u306e\u4f8b\u5916\u3092\u51e6\u7406\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\uff1a<\/p><pre>\u30eb\u30d3\u30fc\n\u958b\u59cb\n  \u958b\u59cb\n    raise \"\u5185\u90e8\u30a8\u30e9\u30fc\"\n  \u30ec\u30b9\u30ad\u30e5\u30fc\n    puts \"\u5185\u90e8\u30a8\u30e9\u30fc\u3092\u691c\u51fa\"\n    raise \"\u5916\u5074\u306e\u30a8\u30e9\u30fc\"\n  end\nrescue\n  puts \"\u5916\u5074\u306e\u30a8\u30e9\u30fc\u3092\u691c\u51fa\"\n\u7d42\u4e86\n#\u51fa\u529b\uff1a\n# \u30ad\u30e3\u30c3\u30c1\u3055\u308c\u305f\u5185\u90e8\u30a8\u30e9\u30fc\n# \u30ad\u30e3\u30c3\u30c1\u3055\u308c\u305f\u5916\u5074\u30a8\u30e9\u30fc<\/pre><h4><strong>\u4f8b\u5916\u306e\u968e\u5c64<\/strong><\/h4><p>Ruby\u306e\u4f8b\u5916\u968e\u5c64\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u4e3b\u306a\u30af\u30e9\u30b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p><ul><li><code>\u4f8b\u5916M<\/code>:\u3059\u3079\u3066\u306e\u4f8b\u5916\u306e\u30eb\u30fc\u30c8\u30af\u30e9\u30b9\u3002<\/li><li><code>\u6a19\u6e96\u30a8\u30e9\u30fc<\/code>:\u306e\u30c7\u30d5\u30a9\u30eb\u30c8 <code>\u30ec\u30b9\u30ad\u30e5\u30fc<\/code> \u307b\u3068\u3093\u3069\u306e\u7d44\u307f\u8fbc\u307f\u4f8b\u5916\u306f\u3053\u308c\u3092\u7d99\u627f\u3057\u3066\u3044\u308b\u3002<\/li><li><code>\u30e9\u30f3\u30bf\u30a4\u30e0\u30a8\u30e9\u30fc<\/code>:\u306e\u30c7\u30d5\u30a9\u30eb\u30c8 <code>\u30ec\u30a4\u30ba<\/code> \u30af\u30e9\u30b9\u306a\u3057\u3002<\/li><li><code>\u30e1\u30bd\u30c3\u30c9\u30a8\u30e9\u30fc\u306a\u3057\u3001\u5f15\u6570\u30a8\u30e9\u30fc\u3001\u30bf\u30a4\u30d7\u30a8\u30e9\u30fc<\/code>\u306a\u3069\uff1a\u7279\u5b9a\u306e\u30a8\u30e9\u30fc\u30bf\u30a4\u30d7\u3002<\/li><\/ul><p>\u3092\u542b\u3080\uff09\u3059\u3079\u3066\u306e\u4f8b\u5916\u3092\u6355\u6349\u3059\u308b\u3002<code>\u6a19\u6e96\u30a8\u30e9\u30fc<\/code> \u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002 <code>\u30b7\u30b9\u30c6\u30e0\u7d42\u4e86<\/code>) \u3092\u4f7f\u7528\u3059\u308b\u3002 <code>\u30ec\u30b9\u30ad\u30e5\u30fc\u4f8b\u5916<\/code>:<\/p><pre>\u30eb\u30d3\u30fc\n\u59cb\u3081\u308b\n  \u7d42\u4e86\nrescue \u4f8b\u5916\n  puts \"\u7d42\u4e86\u3092\u30ad\u30e3\u30c3\u30c1\"\n\u7d42\u4e86\n#\u51fa\u529b\uff1a\u30ad\u30e3\u30c3\u30c1\u3055\u308c\u305f\u7d42\u4e86<\/pre><h4><strong>\u4f7f\u7528\u3059\u308b <\/strong><code>\u30ec\u30b9\u30ad\u30e5\u30fc\u30d5\u30ed\u30e0<\/code><strong> in Rails<\/strong><\/h4><p>Ruby on Rails\u3067\u306f <code>\u30ec\u30b9\u30ad\u30e5\u30fc\u30d5\u30ed\u30e0<\/code> \u4f8b\u5916\u3092\u30b0\u30ed\u30fc\u30d0\u30eb\u306b\u51e6\u7406\u3059\u308b\u305f\u3081\u306b\u3001\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u306e<\/p><pre>\u30eb\u30d3\u30fc\n\u30af\u30e9\u30b9 ApplicationController &lt; ActionController::Base\n  rescue_from ActiveRecord::RecordNotFound, with: :not_found\n\n  \u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\n\n  def not_found\n    \u30d5\u30a1\u30a4\u30eb\u3092\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3059\u308b\uff1a&#039;public\/404.html&#039;, status: :not_found\n  \u7d42\u4e86\n\u7d42\u4e86<\/pre><p>\u3053\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001\u7279\u5b9a\u306e\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u306e\u4f8b\u5916\u51e6\u7406\u3092\u4e00\u5143\u5316\u3059\u308b\u3002<\/p><h3><strong>\u907f\u3051\u308b\u3079\u304d\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74<\/strong><\/h3><ol><li><strong>\u3059\u3079\u3066\u306e\u4f8b\u5916\u3092\u3084\u307f\u304f\u3082\u306b\u30ad\u30e3\u30c3\u30c1\u3059\u308b<\/strong>:\u4f7f\u7528\u4e2d <code>\u30ec\u30b9\u30ad\u30e5\u30fc<\/code> \u4f8b\u5916\u30af\u30e9\u30b9\u3092\u6307\u5b9a\u3057\u306a\u3044\u3068\u3001\u30d0\u30b0\u3092\u96a0\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/li><li><strong>\u9177\u4f7f <\/strong><code>\u30ea\u30c8\u30e9\u30a4<\/code>:\u7121\u9650\u306b\u30ea\u30c8\u30e9\u30a4\u3092\u7e70\u308a\u8fd4\u3059\u3068\u3001\u7121\u9650\u30eb\u30fc\u30d7\u306b\u9665\u3063\u305f\u308a\u3001\u6839\u672c\u7684\u306a\u554f\u984c\u3092\u8986\u3044\u96a0\u3057\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/li><li><strong>\u4f8b\u5916\u306e\u8a73\u7d30\u3092\u7121\u8996\u3059\u308b<\/strong>:\u5e38\u306b\u4f8b\u5916\u30aa\u30d6\u30b8\u30a7\u30af\u30c8 (<code>e.message, e.backtrace<\/code>)\u3092\u30c7\u30d0\u30c3\u30b0\u3059\u308b\u3002<\/li><li><strong>\u975e\u6a19\u6e96\u30a8\u30e9\u30fc\u306e\u767a\u751f<\/strong>:\u3092\u7d99\u627f\u3057\u306a\u3044\u4f8b\u5916\u306e\u767a\u751f\u3092\u907f\u3051\u308b\u3002 <code>\u6a19\u6e96\u30a8\u30e9\u30fc<\/code>\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u6355\u307e\u3089\u306a\u3044\u304b\u3089\u3060\u3002 <code>\u30ec\u30b9\u30ad\u30e5\u30fc<\/code> \u7bc0\u304c\u3042\u308b\u3002<\/li><li><strong>\u8cc7\u6e90\u306e\u5f8c\u59cb\u672b\u3092\u3057\u306a\u3044<\/strong>:\u4f7f\u3044\u5fd8\u308c <code>\u78ba\u4fdd\u3059\u308b<\/code> \u306f\u30d5\u30a1\u30a4\u30eb\u3084\u63a5\u7d9a\u3092\u958b\u3044\u305f\u307e\u307e\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/li><\/ol><h2><strong>\u7d50\u8ad6<\/strong><\/h2><p>Ruby\u3067\u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u3001\u305d\u308c\u3092\u6551\u6e08\u3059\u308b\u3053\u3068\u306f\u3001\u30a8\u30e9\u30fc\u3092\u51e6\u7406\u3057\u3001\u5805\u7262\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306e\u5f37\u529b\u306a\u65b9\u6cd5\u3067\u3059\u3002\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f <strong>\u30ec\u30fc\u30eb\u30ab\u30fc\u30de<\/strong>\u3092\u30ea\u30fc\u30c9\u3057\u3066\u3044\u308b\u3002 <a href=\"https:\/\/www.railscarma.com\/ja\">Ruby on Rails\u958b\u767a\u4f1a\u793e<\/a>\u79c1\u305f\u3061\u306f\u3001\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6d3b\u7528\u3057\u3066\u3001\u4fe1\u983c\u6027\u3068\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u306b <code>\u30ec\u30a4\u30ba<\/code> \u30a8\u30e9\u30fc\u3092\u77e5\u3089\u305b\u308b\u3001 <code>\u30ec\u30b9\u30ad\u30e5\u30fc<\/code> \u306e\u3088\u3046\u306a\u9053\u5177\u304c\u3042\u308b\u3002 <code>\u518d\u8a66\u884c\u3059\u308b\u3002<\/code>\u3001 \u305d\u3057\u3066 <code>\u78ba\u4fdd\u3059\u308b<\/code>\u958b\u767a\u8005\u306f\u30a8\u30e9\u30fc\u3092\u52b9\u679c\u7684\u306b\u7ba1\u7406\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u30af\u30e9\u30b9\u3068\u7279\u5b9a\u306e\u30ec\u30b9\u30ad\u30e5\u30fc\u6761\u9805\u304c\u3001\u30b3\u30fc\u30c9\u306b\u660e\u5feb\u3055\u3068\u6b63\u78ba\u3055\u3092\u52a0\u3048\u307e\u3059\u3002\u7279\u5b9a\u306e\u4f8b\u5916\u3092\u30ec\u30b9\u30ad\u30e5\u30fc\u3059\u308b\u3001\u30ec\u30b9\u30ad\u30e5\u30fc\u30fb\u30d6\u30ed\u30c3\u30af\u3092\u5c0f\u3055\u304f\u4fdd\u3064\u3001\u610f\u5473\u306e\u3042\u308b\u30a8\u30e9\u30fc\u30fb\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u4f7f\u7528\u3059\u308b\u3068\u3044\u3063\u305f\u30d9\u30b9\u30c8\u30fb\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u5f93\u3046\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u3068\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p><p>\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u3001API\u30b3\u30fc\u30eb\u3001\u30c9\u30e1\u30a4\u30f3\u56fa\u6709\u306e\u30ed\u30b8\u30c3\u30af\u306e\u3044\u305a\u308c\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3067\u3082\u3001Ruby\u306e\u4f8b\u5916\u51e6\u7406\u30b7\u30b9\u30c6\u30e0\u306f\u30a8\u30e9\u30fc\u306b\u6f54\u304f\u5bfe\u51e6\u3059\u308b\u67d4\u8edf\u6027\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u30de\u30b9\u30bf\u30fc\u3057\u3001\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u3067\u3001RailsCarma \u306f\u4f01\u696d\u304c\u81ea\u4fe1\u3092\u6301\u3063\u3066\u30a8\u30e9\u30fc\u3092\u51e6\u7406\u3059\u308b\u56de\u5fa9\u529b\u306e\u3042\u308b Ruby \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3067\u304d\u308b\u3088\u3046\u652f\u63f4\u3057\u307e\u3059\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t  <div class=\"related-post slider\">\r\n        <div class=\"headline\">\u95a2\u9023\u8a18\u4e8b<\/div>\r\n    <div class=\"post-list owl-carousel\">\r\n\r\n            <div class=\"item\">\r\n            <div class=\"thumb post_thumb\">\r\n    <a  title=\"MLOps\u306e\u305f\u3081\u306eRuby on Rails: ML\u30c7\u30d7\u30ed\u30a4\u30e1\u30f3\u30c8\u5b8c\u5168\u30ac\u30a4\u30c9\" 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class=\"title post_title\"  title=\"MLOps\u306e\u305f\u3081\u306eRuby on Rails: ML\u30c7\u30d7\u30ed\u30a4\u30e1\u30f3\u30c8\u5b8c\u5168\u30ac\u30a4\u30c9\" href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/ruby-on-rails-for-mlops-ml%e3%83%87%e3%83%97%e3%83%ad%e3%82%a4%e3%83%a1%e3%83%b3%e3%83%88%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89\/?related_post_from=41350\">\r\n        MLOps\u306e\u305f\u3081\u306eRuby on Rails: ML\u30c7\u30d7\u30ed\u30a4\u30e1\u30f3\u30c8\u5b8c\u5168\u30ac\u30a4\u30c9  <\/a>\r\n\r\n        <\/div>\r\n              <div class=\"item\">\r\n            <div class=\"thumb post_thumb\">\r\n    <a  title=\"Ruby on Rails\u3067\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u578bAI\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3059\u308b\" href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/building-agentic-ai-applications-with-ruby-on-rails\/?related_post_from=41339\">\r\n\r\n      <img decoding=\"async\" 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alt=\"\u30aa\u30d5\u30ea\u30d0\u30c6\u30a3\u30fb\u30eb\u30d3\u30fc\u30fb\u30b8\u30a7\u30e0\" srcset=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2026\/04\/What-is-Offliberty-Ruby-Gem-and-How-It-Works.png 800w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2026\/04\/What-is-Offliberty-Ruby-Gem-and-How-It-Works-300x113.png 300w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2026\/04\/What-is-Offliberty-Ruby-Gem-and-How-It-Works-768x288.png 768w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2026\/04\/What-is-Offliberty-Ruby-Gem-and-How-It-Works-18x7.png 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\r\n\r\n    <\/a>\r\n  <\/div>\r\n\r\n  <a class=\"title post_title\"  title=\"Offliberty Ruby Gem\u3068\u306f\uff1f\" href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/what-is-offliberty-ruby-gem-and-how-it-works\/?related_post_from=41304\">\r\n        Offliberty Ruby Gem\u3068\u306f\uff1f  <\/a>\r\n\r\n        <\/div>\r\n              <div 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...<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/how-to-build-a-scalable-saas-platform-using-ruby-on-rails\/\"> <span class=\"screen-reader-text\">Ruby on Rails\u3092\u4f7f\u3063\u3066\u30b9\u30b1\u30fc\u30e9\u30d6\u30eb\u306aSaaS\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u65b9\u6cd5<\/span> \u3082\u3063\u3068\u8aad\u3080 \"<\/a><\/p>","protected":false},"author":11,"featured_media":40195,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1224],"tags":[],"class_list":["post-40177","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Raise and Rescue Exceptions in Ruby - RailsCarma<\/title>\n<meta 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