{"id":12312,"date":"2020-11-29T20:24:25","date_gmt":"2020-11-29T11:24:25","guid":{"rendered":"http:\/\/www.code-magagine.com\/?p=12312"},"modified":"2023-05-27T22:44:07","modified_gmt":"2023-05-27T13:44:07","slug":"%e3%80%90ruby-on-rails%e3%80%91%e3%80%8c%e3%83%95%e3%82%a9%e3%83%bc%e3%83%a0%e3%82%aa%e3%83%96%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%80%8d%e3%81%ab%e3%81%a4%e3%81%84%e3%81%a6","status":"publish","type":"post","link":"http:\/\/www.code-magagine.com\/?p=12312","title":{"rendered":"\u3010Ruby on Rails\u3011\u300cActiveModel\u300d\u3001\u300c\u30d5\u30a9\u30fc\u30e0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u300d\u3001\u300cEachValidator\u300d\u3001\u300c\u5358\u4e00\u30c6\u30fc\u30d6\u30eb\u7d99\u627f(STI)\u300d"},"content":{"rendered":"

ActiveModel\u3068\u306f\uff1f<\/h2>\n

\u975eActiveRecord\u306e\u30bd\u30fc\u30b9\u3092\u8907\u96d1\u306b\u3057\u3066\u3044\u308b\u30c7\u30fc\u30bf\u3084\u51e6\u7406\u306e\u307e\u3068\u307e\u308a\u3092\u898b\u3064\u3051\u3066\u305d\u308c\u3092\u30af\u30e9\u30b9\u306b\u3059\u308b\u7b49\u306e\u6a5f\u80fd\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n

ActiveModel\u306e\u4ee3\u8868\u7684\u306a\u30b5\u30d6\u30e2\u30b8\u30e5\u30fc\u30eb<\/h3>\n

ActiveModel\u306f\u3044\u304f\u3064\u304b\u306e\u30b5\u30d6\u30e2\u30b8\u30e5\u30fc\u30eb\u304b\u3089\u69cb\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n\n\n\n\n\n
\u30e2\u30b8\u30e5\u30fc\u30eb\u540d<\/th>\n\u6a5f\u80fd<\/th>\n<\/tr>\n
AttributeAssignment<\/td>\nattr_accessor\u7b49\u3067\u5b9a\u7fa9\u3057\u305f\u5c5e\u6027\u5024\u3078\u306e\u30a2\u30af\u30bb\u30b5\u30e1\u30bd\u30c3\u30c9\u306b\u5bfe\u3057\u3066Hash\u3067\u5024\u3092\u5272\u308a\u5f53\u3066\u308b\u300cassign_attributes\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3059\u308b\u3002<\/td>\n<\/tr>\n
Naming<\/td>\n\u30e2\u30c7\u30eb\u540d\u3092\u4fbf\u5229\u306b\u6271\u3046\u300cmodel_name\u300d\u30af\u30e9\u30b9\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3059\u308b\u3002\u3053\u308c\u304b\u3089\u5f97\u3089\u308c\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5bfe\u3057\u3066Rails\u306fi18n\u3084routing\u7b49\u306e\u985e\u63a8\u3092\u884c\u3046\u3002<\/td>\n<\/tr>\n
Conversion<\/td>\n\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u60c5\u5831\u304b\u3089URL\u30d1\u30e9\u30e1\u30fc\u30bf\u751f\u6210\u3084\u30d1\u30fc\u30b7\u30e3\u30eb\u30d1\u30b9\u306e\u89e3\u6c7a\u304c\u3067\u304d\u308b\u3002<\/td>\n<\/tr>\n
Translation<\/td>\n\u300chuman_attribute_name\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u901a\u3058\u3066i18n\u306b\u3088\u308b\u5909\u63db\u3092\u5229\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u3002\u3053\u306e\u6a5f\u80fd\u3092\u4f7f\u3063\u3066\u30d5\u30a9\u30fc\u30e0\u30d8\u30eb\u30d1\u30fc\u306f\u81ea\u52d5\u3067\u5c5e\u6027\u540d\u3092\u5909\u63db\u3057\u305f\u308a\u3059\u308b\u3002<\/td>\n<\/tr>\n
Validations<\/td>\n\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3084\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u300cerrors\u300d\u30e1\u30bd\u30c3\u30c9\u3092\u6271\u3048\u308b\u3088\u3046\u306b\u3059\u308b\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u30d5\u30a9\u30fc\u30e0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u306f\uff1f<\/h2>\n

\u300c\u975eActiveRecord\u30e2\u30c7\u30eb\u300d<\/strong><\/span>\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u3059\u3002form_with\u30e1\u30bd\u30c3\u30c9\u306emodel\u30aa\u30d7\u30b7\u30e7\u30f3\u306b\u7d10\u3065\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u7528\u9014<\/h2>\n

\u300c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306f\u7121\u95a2\u4fc2\u306a\u30d5\u30a9\u30fc\u30e0\u300d\u3084\u300c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c6\u30fc\u30d6\u30eb\u30681:1\u306b\u7d10\u3065\u3044\u3066\u3044\u306a\u3044\u30d5\u30a9\u30fc\u30e0\u300d\u3092form_with\u30e1\u30bd\u30c3\u30c9\u3067\u751f\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u4f5c\u6210\u30c7\u30a3\u30ec\u30af\u30c8\u30ea<\/h2>\n

Rails\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4e0b\u8a18\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3067\u4f5c\u6210\u3059\u308b\u5834\u5408\u304c\u591a\u3044\u3067\u3059\u3002<\/p>\n

app\/forms<\/pre>\n
\u5b9f\u969b\u306e\u696d\u52d9\u3067\u306f\u3001\u3055\u3089\u306b\u30b5\u30d6\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u4f5c\u6210\u3057\u3066\u300c\u540d\u524d\u7a7a\u9593::xxxForm\u300d<\/strong><\/span>\u3068\u3044\u3046\u30d5\u30a9\u30fc\u30e0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30af\u30e9\u30b9\u6307\u5b9a\u3092\u3057\u3066\u3044\u308b\u3053\u3068\u3082\u591a\u3044\u3067\u3059\u3002<\/p>\n
\u5b9f\u88c5\u65b9\u6cd5<\/h2>\n
\u30d5\u30a9\u30fc\u30e0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u65b9\u6cd5<\/h3>\n
class \u540d\u524d\u7a7a\u9593(\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u5207\u3063\u3066\u3044\u305f\u5834\u5408)::xxxForm\r\n  include ActiveModel::Model\r\n\r\n  attr_accessor :\u30d5\u30a9\u30fc\u30e0\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u540d1, :\u30d5\u30a9\u30fc\u30e0\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u540d2\r\nend<\/pre>\n
\u30dd\u30a4\u30f3\u30c8\u3068\u3057\u3066\u306f\u4e0b\u8a18\u306e2\u70b9\u3067\u3059\u3002\u3053\u308c\u3092\u5b88\u308c\u3070form_with\u306emodel\u3067\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n
    \n
  • ActiveModel::Model\u3092include\u3059\u308b\u3053\u3068<\/li>\n
  • ActiveRecord::Base\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u306a\u3044\u3053\u3068<\/li>\n<\/ul>\n
    attr_accessor\u3067\u6307\u5b9a\u3057\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\u306fform_with\u5185\u3067\u4f7f\u7528\u3067\u304d\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u540d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
    \u547c\u3073\u51fa\u3057\u65b9<\/h3>\n
    \u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u3067\u4e0b\u8a18\u306e\u3088\u3046\u306b\u30d5\u30a9\u30fc\u30e0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5909\u6570\u306b\u683c\u7d0d\u3057\u307e\u3059\u3002<\/p>\n
    @form = \u540d\u524d\u7a7a\u9593\u540d::\u30d5\u30a9\u30fc\u30e0\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540d.new<\/pre>\n
    \u30d3\u30e5\u30fc\u5074\u3067\u306f\u4e0b\u8a18\u306e\u3088\u3046\u306b\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
      <%= form_with model: @form, url: :\u30d1\u30b9 do |f| %>\r\n\u3000\u3000\u3000\u3000\u2025\r\n  <% end %><\/pre>\n
    EachValidator<\/h2>\n
    \u300cActiveModel::EachValidator\u300d\u3092\u4f7f\u3048\u3070\u3001\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u7528\u306e\u30af\u30e9\u30b9\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
    \u547c\u3073\u51fa\u3057\u5143<\/h3>\n
    lib\/validator\/email_validator.rb<\/strong><\/h4>\n
    class EmailValidator < ActiveModel::EachValidator\r\n    def validate_each(record, attribute, value)\r\n        record.errors.add(attribute, :too_long, count: max) if value.length > 100\r\n    end\r\nend<\/pre>\n
    email\u306e\u30d0\u30ea\u30c7\u30fc\u30bf\u30fc\u3067\u3042\u308c\u3070\u4e0a\u8a18\u306e\u3088\u3046\u306b\u300cEmailValidater\u300d\u3068\u3044\u3046\u30af\u30e9\u30b9\u540d\u306b\u3057\u307e\u3059\u3002email\u3068\u3044\u3046\u540d\u524d\u3067\u547c\u3073\u51fa\u3059\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
    validate_each\u30e1\u30bd\u30c3\u30c9<\/h4>\n
    byebug\u3092\u4ed5\u8fbc\u3093\u3067\u3001\u30e2\u30c7\u30eb\u540d.create\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3059\u308c\u3070\u4e2d\u8eab\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
    record<\/h5>\n
    \u3053\u308c\u304b\u3089\u767b\u9332\u3057\u3088\u3046\u3068\u3059\u308b\u30e2\u30c7\u30eb\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5165\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
    errors.add(\u5c5e\u6027,\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\uff09<\/pre>\n
    attribute<\/h5>\n
    \u5c5e\u6027\u304c\u5165\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
    value<\/h5>\n
    \u767b\u9332\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u308b\u5024\u304c\u5165\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
    \u547c\u3073\u51fa\u3057\u5148<\/h3>\n
    Rails\u306e\u30aa\u30fc\u30c8\u30ed\u30fc\u30c0\u30fc\u306e\u300cZeitwerk\u300d\u3067\u306flib\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u914d\u4e0b\u306f\u81ea\u52d5\u3067\u30ed\u30fc\u30c9\u3057\u3066\u304f\u308c\u306a\u3044\u306e\u3067require\u3067\u660e\u793a\u7684\u306b\u547c\u3073\u51fa\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
    require \"validator\/email_validator\"\r\n\r\nclass User < ApplicationRecord\r\n    validates :email\r\nend<\/pre>\n
    \u5358\u4e00\u30c6\u30fc\u30d6\u30eb\u7d99\u627f(STI)\u3068\u306f\uff1f<\/h2>\n
    \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u7d99\u627f\u3092RDBMS\u3067\u7591\u4f3c\u7684\u306b\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002Rails\u3067\u306ftype\u30ab\u30e9\u30e0\u306b\u30af\u30e9\u30b9\u540d\u3092\u8a18\u9332\u3059\u308b\u3053\u3068\u3067\u5b9f\u73fe\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n
    \u5b9f\u88c5\u65b9\u6cd5<\/h3>\n
    model\u306e\u30af\u30e9\u30b9\u3092\u4e0b\u8a18\u306e\u3088\u3046\u306b\u89aa\u30af\u30e9\u30b9\u3068\u5b50\u30af\u30e9\u30b9\u3067\u305d\u308c\u305e\u308c\u4f5c\u6210\u3057\u3066\u5b50\u30af\u30e9\u30b9\u306b\u306f\u89aa\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3055\u305b\u307e\u3059\u3002<\/p>\n
    class \u89aa\u30af\u30e9\u30b9 < ApplicationRecord\r\nend\r\n\r\nclass \u5b50\u30af\u30e9\u30b91 < \u89aa\u30af\u30e9\u30b9\r\nend\r\n\r\nclass \u5b50\u30af\u30e9\u30b92 < \u89aa\u30af\u30e9\u30b9\r\nend<\/pre>\n
    \u4fdd\u5b58<\/h4>\n
    Rails\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u4e0b\u8a18\u306e\u3088\u3046\u306b\u4fdd\u5b58\u51e6\u7406\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
    \u5b50\u30af\u30e9\u30b91.create(\u89aa\u30af\u30e9\u30b9\u306e\u5217\uff1a\u3000\"1001\")\r\n\u5b50\u30af\u30e9\u30b92.create(\u89aa\u30af\u30e9\u30b9\u306e\u5217\uff1a\u3000\"1003\")<\/pre>\n
    \u5b9f\u969b\u306b\u30c6\u30fc\u30d6\u30eb\u306b\u683c\u7d0d\u3055\u308c\u308b\u30ec\u30b3\u30fc\u30c9\u306f\u4e0b\u8a18\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002type\u30ab\u30e9\u30e0\u306fRails\u304c\u81ea\u52d5\u7684\u306b\u8a2d\u5b9a\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n\n\n
    id<\/th>\ntype<\/th>\n\u30ec\u30b3\u30fc\u30c9\u540d<\/th>\n<\/tr>\n
    1<\/td>\n\u5b50\u30af\u30e9\u30b91<\/td>\n1001<\/td>\n<\/tr>\n
    2<\/td>\n\u5b50\u30af\u30e9\u30b92<\/td>\n1003<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u53d6\u5f97<\/h4>\n
    \u4e0b\u8a18\u306e\u3088\u3046\u306b\u53d6\u5f97\u3057\u307e\u3059\u3002\u306a\u304a\u3001\u30b5\u30d6\u30af\u30e9\u30b91\u306b\u5bfe\u5fdc\u3059\u308b\u30ec\u30b3\u30fc\u30c9\u304c\u306a\u3051\u308c\u3070\u30ec\u30b3\u30fc\u30c9\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u3068\u3044\u3046\u30a8\u30e9\u30fc\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u306e\u3067\u6ce8\u610f\u3067\u3059\u3002<\/p>\n
    \u30b5\u30d6\u30af\u30e9\u30b91.find(1)\r\n\u30b5\u30d6\u30af\u30e9\u30b92.find(2)<\/pre>\n","protected":false},"excerpt":{"rendered":"ActiveModel\u3068\u306f\uff1f \u975eActiveRecord\u306e\u30bd\u30fc\u30b9\u3092\u8907\u96d1\u306b\u3057\u3066\u3044\u308b\u30c7\u30fc\u30bf\u3084\u51e6\u7406\u306e\u307e\u3068\u307e\u308a\u3092\u898b\u3064\u3051\u3066\u305d\u308c\u3092\u30af\u30e9\u30b9\u306b\u3059\u308b\u7b49\u306e\u6a5f\u80fd\u306e\u3053\u3068\u3067\u3059\u3002 ActiveModel\u306e\u4ee3\u8868\u7684\u306a\u30b5\u30d6\u30e2\u30b8\u30e5\u30fc\u30eb ActiveMode […]","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[36],"tags":[],"_links":{"self":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/12312"}],"collection":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12312"}],"version-history":[{"count":13,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/12312\/revisions"}],"predecessor-version":[{"id":20499,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/12312\/revisions\/20499"}],"wp:attachment":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12312"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12312"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12312"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}