{"id":9230,"date":"2020-01-10T22:44:13","date_gmt":"2020-01-10T13:44:13","guid":{"rendered":"http:\/\/www.code-magagine.com\/?p=9230"},"modified":"2023-05-27T22:49:09","modified_gmt":"2023-05-27T13:49:09","slug":"%e3%80%90ruby-on-rails%e3%80%91%e3%80%8ccancancan%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=9230","title":{"rendered":"\u3010Ruby on Rails\u3011\u300ccancancan\u300d\u306b\u3064\u3044\u3066"},"content":{"rendered":"<h2>cancancan\u3068\u306f\uff1f<\/h2>\n<p>Rails\u3067\u6a29\u9650\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306eGem\u3067\u3059\u3002\u57fa\u672c\u7684\u306b\u306f\u958b\u767a\u73fe\u5834\u3067\u306f\u8a8d\u8a3c\u7528\u306eGem\u3067\u3042\u308bdevise\u3068\u5171\u306b\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3088\u3046\u3067\u3059\u3002devise\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u306f\u4e0b\u8a18\u306e\u8a18\u4e8b\u3067\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"Qm8x98HV2F\"><p><a href=\"http:\/\/www.code-magagine.com\/?p=9168\">\u3010Ruby on Rails\u3011\u300cdevise\u300d\u3001\u300cdevise_invitable\u300d\u306b\u3064\u3044\u3066<\/a><\/p><\/blockquote>\n<p><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" src=\"http:\/\/www.code-magagine.com\/?p=9168&#038;embed=true#?secret=Qm8x98HV2F\" data-secret=\"Qm8x98HV2F\" width=\"500\" height=\"282\" title=\"&#8220;\u3010Ruby on Rails\u3011\u300cdevise\u300d\u3001\u300cdevise_invitable\u300d\u306b\u3064\u3044\u3066&#8221; &#8212; \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30de\u30ac\u30b8\u30f3\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n<h2>\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/h2>\n<p>Gemfile\u306b\u4e0b\u8a18\u306e\u8a18\u8ff0\u3092\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">gem 'cancancan'<\/pre>\n<p>bundle\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">bundle install<\/pre>\n<h2>\u524d\u63d0<\/h2>\n<p>devise\u3092\u5229\u7528\u3057\u305f\u969b\u306busers\u30e2\u30c7\u30eb\u3092\u4f5c\u6210\u3059\u308b\u3068\u601d\u3044\u307e\u3059\u3002\u30ab\u30e9\u30e0\u306f\u4e0b\u8a18\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u3068\u601d\u3044\u307e\u3059\u3002\uff08sqlite\u306b\u3066\u78ba\u8a8d\uff09<\/p>\n<pre class=\"lang:default decode:true \">sqlite&gt; PRAGMA table_info('users');\r\n0|id|integer|1||1\r\n1|email|varchar|1|''|0\r\n2|encrypted_password|varchar|1|''|0\r\n3|reset_password_token|varchar|0|NULL|0\r\n4|reset_password_sent_at|datetime|0|NULL|0\r\n5|remember_created_at|datetime|0|NULL|0\r\n6|created_at|datetime|1||0\r\n7|updated_at|datetime|1||0<\/pre>\n<p>\u4e0b\u8a18\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066users\u30c6\u30fc\u30d6\u30eb\u306brole\u3068\u3044\u3046\u30ab\u30e9\u30e0\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">rails g migration add_role_to_users<\/pre>\n<p>\u4e0b\u8a18\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002integer\u578b\u3067\u6570\u5b57\u3067\u6a29\u9650\u3092\u7ba1\u7406\u3057\u307e\u3059\u30021\u304c\u4e00\u822c\u6a29\u9650\u3067\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u5024\u3068\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">class AddRoleToUsers &lt; ActiveRecord::Migration[5.2]\r\n  def change\r\n    add_column :users, :roll, :integer, null: false,default: 1\r\n  end\r\nend<\/pre>\n<p>\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">rails db:migrate<\/pre>\n<p>roll\u3068\u3044\u3046\u30ab\u30e9\u30e0\u304cusers\u306b\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"lang:default decode:true\">sqlite&gt; PRAGMA table_info('users');\r\n0|id|integer|1||1\r\n1|email|varchar|1|''|0\r\n2|encrypted_password|varchar|1|''|0\r\n3|reset_password_token|varchar|0|NULL|0\r\n4|reset_password_sent_at|datetime|0|NULL|0\r\n5|remember_created_at|datetime|0|NULL|0\r\n6|created_at|datetime|1||0\r\n7|updated_at|datetime|1||0\r\n8|roll|integer|1|1|0\u3000\u2605new<\/pre>\n<h2>cancancan\u306e\u4f7f\u3044\u65b9<\/h2>\n<p>Ability\u30af\u30e9\u30b9\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">rails g cancan:ability<\/pre>\n<p>\u4e0b\u8a18\u306e\u30d5\u30a1\u30a4\u30eb\u304c<span style=\"color: #ff0000;\"><strong>\u300capp\/models\/ability.rb\u300d<\/strong><\/span>\u306b\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">class Ability\r\n  include CanCan::Ability\r\n\r\n  def initialize(user)\r\n    # Define abilities for the passed in user here. For example:\r\n    #\r\n    #   user ||= User.new # guest user (not logged in)\r\n    #   if user.admin?\r\n    #     can :manage, :all\r\n    #   else\r\n    #     can :read, :all\r\n    #   end\r\n    #\r\n    # The first argument to `can` is the action you are giving the user\r\n    # permission to do.\r\n    # If you pass :manage it will apply to every action. Other common actions\r\n    # here are :read, :create, :update and :destroy.\r\n    #\r\n    # The second argument is the resource the user can perform the action on.\r\n    # If you pass :all it will apply to every resource. Otherwise pass a Ruby\r\n    # class of the resource.\r\n    #\r\n    # The third argument is an optional hash of conditions to further filter the\r\n    # objects.\r\n    # For example, here the user can only update published articles.\r\n    #\r\n    #   can :update, Article, :published =&gt; true\r\n    #\r\n    # See the wiki for details:\r\n    # https:\/\/github.com\/CanCanCommunity\/cancancan\/wiki\/Defining-Abilities\r\n  end\r\nend<\/pre>\n<p>\u4e0b\u8a18\u306e\u3088\u3046\u306b\u66f8\u304d\u76f4\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u30a2\u30d7\u30ea\u304c\u8d77\u52d5\u3059\u308b\u969b\u306b\u8aad\u307f\u8fbc\u307e\u308c\u308bcancancan\u306e\u6a29\u9650\u521d\u671f\u5316\u8a2d\u5b9a\u306b\u306a\u308a\u307e\u3059\u3002user\u306b\u306fdevise\u3067\u30ed\u30b0\u30a4\u30f3\u3057\u305f\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u304c\u5165\u308b\u306e\u3067devise\u3067\u5272\u308a\u632f\u3063\u305f\u6a29\u9650\u60c5\u5831\u306b\u57fa\u3065\u3044\u3066\u4efb\u610f\u306e\u6a29\u9650\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">class Ability\r\n  include CanCan::Ability\r\n\r\n  def initialize(user)\r\n    user ||= User.new\r\n\r\n    if user.roll == 2\r\n      can :manage, :all\r\n    elsif user.roll == 1\r\n      can :read, :hello\r\n    end\r\n  end\r\nend<\/pre>\n<h3>can :\u6a29\u9650, :\u6a29\u9650\u3092\u8a2d\u5b9a\u3059\u308b\u30e2\u30c7\u30eb\u540d<\/h3>\n<p>\u30e2\u30c7\u30eb\u306b\u5bfe\u3057\u3066\u6a29\u9650\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<h4>\u6a29\u9650\u306e\u7a2e\u985e<\/h4>\n<p>\u57fa\u672c\u7684\u306b\u306f\u6a29\u9650\u306b\u306f5\u3064\u306e\u6a29\u9650\u304c\u3042\u308a\u307e\u3059\u3002\uff08\u3082\u3061\u308d\u3093\u72ec\u81ea\u306b\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u306b\u8ffd\u52a0\u3057\u305f\u30a2\u30af\u30b7\u30e7\u30f3\u3082\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002\uff09<\/p>\n<table>\n<tbody>\n<tr>\n<th>\u6a29\u9650\u306e\u7a2e\u985e<\/th>\n<th>\u8aac\u660e<\/th>\n<\/tr>\n<tr>\n<td>create<\/td>\n<td>\u4f5c\u6210\u6a29\u9650\u3092\u6301\u3064<\/td>\n<\/tr>\n<tr>\n<td>read<\/td>\n<td>\u8aad\u307f\u53d6\u308a\u6a29\u9650\u3092\u6301\u3064<\/td>\n<\/tr>\n<tr>\n<td>update<\/td>\n<td>\u66f4\u65b0\u6a29\u9650\u3092\u6301\u3064<\/td>\n<\/tr>\n<tr>\n<td>destroy<\/td>\n<td>\u524a\u9664\u6a29\u9650\u3092\u6301\u3064<\/td>\n<\/tr>\n<tr>\n<td>manage<\/td>\n<td>\u5168\u3066\u306e\u6a29\u9650\u3092\u6301\u3064<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u30e2\u30c7\u30eb\u306b\u7d10\u3065\u3044\u3066\u3044\u306a\u3044\u30da\u30fc\u30b8\u3078\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3092\u3057\u305f\u3044\u5834\u5408<\/h3>\n<p>user\u3068\u3044\u3046\u30da\u30fc\u30b8\u3092\u8868\u793a\u3055\u305b\u305f\u304f\u306a\u3044\u5834\u5408\u306f\u4e0b\u8a18\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">cannot :index, :user<\/pre>\n<p>\u4efb\u610f\u306e\u30d3\u30e5\u30fc\u5074\u306b\u4e0b\u8a18\u306e\u3088\u3046\u306a\u8a18\u8ff0\u3092\u3059\u308c\u3070\u6a29\u9650\u306b\u3088\u308b\u30d3\u30e5\u30fc\u306e\u5236\u5fa1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">&lt;% if can? :read, :hello %&gt;\r\n  &lt;p&gt;read\u6a29\u9650\u304c\u3042\u308a\u307e\u3059&lt;\/p&gt;  \r\n&lt;% end %&gt;<\/pre>\n","protected":false},"excerpt":{"rendered":"cancancan\u3068\u306f\uff1f Rails\u3067\u6a29\u9650\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306eGem\u3067\u3059\u3002\u57fa\u672c\u7684\u306b\u306f\u958b\u767a\u73fe\u5834\u3067\u306f\u8a8d\u8a3c\u7528\u306eGem\u3067\u3042\u308bdevise\u3068\u5171\u306b\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3088\u3046\u3067\u3059\u3002devise\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u306f\u4e0b\u8a18\u306e\u8a18\u4e8b\u3067\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002 \u3010 [&hellip;]","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\/9230"}],"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=9230"}],"version-history":[{"count":11,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/9230\/revisions"}],"predecessor-version":[{"id":20516,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/9230\/revisions\/20516"}],"wp:attachment":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9230"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}