{"id":2892,"date":"2021-12-08T07:58:25","date_gmt":"2021-12-07T22:58:25","guid":{"rendered":"https:\/\/suzutukiblog.com\/?p=2892"},"modified":"2022-01-23T05:48:19","modified_gmt":"2022-01-22T20:48:19","slug":"rails-tutorial14","status":"publish","type":"post","link":"https:\/\/suzutukiblog.com\/index.php\/2021\/12\/08\/rails-tutorial14\/","title":{"rendered":"Rails-tutorial\u306e\u307e\u3068\u3081(\u7b2c14\u7ae0 \u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc \u4e3b\u306b\u6f14\u7fd2)"},"content":{"rendered":"

13\u7ae0\u304b\u3089\u7d9a\u304f<\/a><\/p>\n

\u7b2c14\u7ae0\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc\u3059\u308b<\/h3>\n

\u4ed6\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc(\u304a\u3088\u3073\u30d5\u30a9\u30ed\u30fc\u89e3\u9664)\u3067\u304d\u308b\u30bd\u30fc\u30b7\u30e3\u30eb\u306a\u4ed5\u7d44\u307f\u306e\u8ffd\u52a0\u3068\u3001
\n\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306e\u6295\u7a3f\u3092\u30b9\u30c6\u30fc\u30bf\u30b9\u30d5\u30a3\u30fc\u30c9\u306b\u8868\u793a\u3059\u308b\u6a5f\u80fd\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n

\u3053\u3053\u3067\u5b66\u3093\u3060\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306f\u3001\u4eca\u5f8c\u81ea\u5206\u7528\u306eWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u3068\u304d\u306b\u5fc5\u305a\u5f79\u306b\u7acb\u3061\u307e\u3059\u3002<\/p>\n

14.1 Relationship\u30e2\u30c7\u30eb<\/h3>\n

\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc\u3059\u308b\u6a5f\u80fd\u3092\u5b9f\u88c5\u3059\u308b\u7b2c\u4e00\u6b69\u306f\u3001\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3092\u69cb\u6210\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u3053\u308c\u306f\u898b\u305f\u76ee\u307b\u3069\u5358\u7d14\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n

\u7d20\u6734\u306b\u8003\u3048\u308c\u3070\u3001has_many<\/code>\u00a0(1\u5bfe\u591a) \u306e\u95a2\u9023\u4ed8\u3051\u3092\u7528\u3044\u3066\u300c1\u4eba\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u8907\u6570\u306e\u30e6\u30fc\u30b6\u30fc\u3092has_many<\/code>\u3068\u3057\u3066\u30d5\u30a9\u30ed\u30fc\u3057\u30011\u4eba\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u8907\u6570\u306e\u30d5\u30a9\u30ed\u30ef\u30fc\u304c\u3044\u308b\u3053\u3068\u3092has_many<\/code>\u3067\u8868\u3059\u300d\u3068\u3044\u3063\u305f\u65b9\u6cd5\u3067\u3082\u5b9f\u88c5\u3067\u304d\u305d\u3046\u3067\u3059\u3002\u3057\u304b\u3057\u5f8c\u307b\u3069\u8aac\u660e\u3057\u307e\u3059\u304c\u3001\u3053\u306e\u65b9\u6cd5\u3067\u306f\u305f\u3061\u307e\u3061\u58c1\u306b\u7a81\u304d\u5f53\u305f\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3053\u308c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306ehas_many through<\/code>\u306b\u3064\u3044\u3066\u3082\u3053\u306e\u5f8c\u3067\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n

14.1.1\u00a0<\/span>\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u554f\u984c (\u304a\u3088\u3073\u89e3\u6c7a\u7b56)<\/h3>\n

\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u30fc\u306e\u96c6\u5408\u306ffollowers\u3068\u306a\u308auser.followers\u306f\u305d\u308c\u3089\u306e\u30e6\u30fc\u30b6\u30fc\u306e\u914d\u5217\u3092\u8868\u3059\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

Twitter\u306e\u6163\u7fd2\u306b\u306a\u3089\u3044\u3001\u672c\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306ffollowing\u3068\u3044\u3046
\n\u547c\u79f0\u3092\u63a1\u7528\u3057\u307e\u3059 (\u4f8b: \u201c50 following, 75 followers\u201d)\u3002<\/p>\n

\u3057\u305f\u304c\u3063\u3066\u3001\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u304c\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u30fc\u306e\u96c6\u5408\u306fcalvin.following\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

following\u30c6\u30fc\u30d6\u30eb\u3068 has_many\u95a2\u9023\u4ed8\u3051\u3092\u4f7f\u3063\u3066\u3001
\n\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306e\u30e2\u30c7\u30ea\u30f3\u30b0\u304c\u3067\u304d\u307e\u3059\u3002
\nuser.following\u306f\u30e6\u30fc\u30b6\u30fc\u306e\u96c6\u5408\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u305f\u3081\u3001<\/p>\n

following\u30c6\u30fc\u30d6\u30eb\u306e\u305d\u308c\u305e\u308c\u306e\u884c\u306f\u3001followed_id\u3067\u8b58\u5225\u53ef\u80fd\u306a\u30e6\u30fc\u30b6\u30fc\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093 (\u3053\u308c\u306ffollower_id\u306e\u95a2\u9023\u4ed8\u3051\u306b\u3064\u3044\u3066\u3082\u540c\u69d8\u3067\u3059)\u3002<\/p>\n

\u3055\u3089\u306b\u3001\u305d\u308c\u305e\u308c\u306e\u884c\u306f\u30e6\u30fc\u30b6\u30fc\u306a\u306e\u3067\u3001
\n\u3053\u308c\u3089\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u540d\u524d\u3084\u30d1\u30b9\u30ef\u30fc\u30c9\u306a\u3069\u306e\u5c5e\u6027\u3082\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n

2\u3064\u306e\u7591\u554f\u304c\u751f\u3058\u307e\u3059\u3002<\/p>\n

1. \u3042\u308b\u30e6\u30fc\u30b6\u30fc\u304c\u5225\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc\u3059\u308b\u3068\u304d\u3001\u4f55\u304c\u4f5c\u6210\u3055\u308c\u308b\uff1f<\/strong>\r\n\r\n2. \u3042\u308b\u30e6\u30fc\u30b6\u30fc\u304c\u5225\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc\u89e3\u9664\u3059\u308b\u3068\u304d\u3001\u4f55\u304c\u524a\u9664\u3055\u308c\u308b\uff1f\u3002<\/strong><\/pre>\n
1\u4eba\u306e\u30e6\u30fc\u30b6\u30fc\u306f1\u5bfe\u591a\u306e\u95a2\u4fc2\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u3001
\n\u3055\u3089\u306b\u30e6\u30fc\u30b6\u30fc\u306f\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u3092\u7d4c\u7531\u3057\u3066\u591a\u304f\u306efollowing
\n(\u307e\u305f\u306ffollowers) \u3068\u95a2\u4fc2\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n
Facebook\u306e\u3088\u3046\u306a\u53cb\u597d\u95a2\u4fc2 (Friendships) \u3067\u306f\u672c\u8cea\u7684\u306b
\n\u5de6\u53f3\u5bfe\u79f0\u306e\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u304c\u6210\u308a\u7acb\u3061\u307e\u3059\u304c\u3001
\nTwitter\u306e\u3088\u3046\u306a\u30d5\u30a9\u30ed\u30fc\u95a2\u4fc2\u3067\u306f\u5de6\u53f3\u975e\u5bfe\u79f0\u306e\u6027\u8cea\u304c\u3042\u308a\u307e\u3059\u3002
\n\u3059\u306a\u308f\u3061\u3001Calvin\u306fHobbes\u3092\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u3066\u3082\u3001
\nHobbes\u306fCalvin\u3092\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u306a\u3044\u3068\u3044\u3063\u305f\u95a2\u4fc2\u6027\u304c\u6210\u308a\u7acb\u3064\u306e\u3067\u3059\u3002<\/p>\n
\u5de6\u53f3\u975e\u5bfe\u79f0\u306a\u95a2\u4fc2\u6027\u3092\u898b\u5206\u3051\u308b\u305f\u3081\u306b\u3001
\n\u305d\u308c\u305e\u308c\u3092\u80fd\u52d5\u7684\u95a2\u4fc2 (Active Relationship)\u3068
\n\u53d7\u52d5\u7684\u95a2\u4fc2 (Passive Relationship)\u3068\u547c\u3076\u3053\u3068\u306b\u3057\u307e\u3059<\/p>\n
Calvin\u304cHobbes\u3092\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u304c\u3001
\nHobbes\u306fCalvin\u3092\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u3067\u306f\u3001
\nCalvin\u306fHobbes\u306b\u5bfe\u3057\u3066\u300c\u80fd\u52d5\u7684\u95a2\u4fc2\u300d\u3092\u6301\u3063\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u3064\u307e\u308a\u30a2\u30a4\u30c9\u30eb\u3068\u30d5\u30a1\u30f3\u306e\u95a2\u4fc2\u306e\u3088\u3046\u306a\u3082\u306e\u3067Calvin\u306f\u30a2\u30a4\u30c9\u30eb\u306a\u308f\u3051\u3088<\/p>\n
\u9006\u306b\u3001Hobbes\u306fCalvin\u306b\u5bfe\u3057\u3066\u300c\u53d7\u52d5\u7684\u95a2\u4fc2\u300d\u3092\u6301\u3063\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u3064\u307e\u308a\u30a2\u30a4\u30c9\u30eb\u3068\u30d5\u30a1\u30f3\u306e\u95a2\u4fc2\u306e\u3088\u3046\u306a\u3082\u306e\u3067Hobbes\u306f\u30d5\u30a1\u30f3\u306a\u308f\u3051\u3088
\n\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u3092\u751f\u6210\u3059\u308b\u305f\u3081\u306b\u3001\u80fd\u52d5\u7684\u95a2\u4fc2\u306b\u7126\u70b9\u3092\u5f53\u3066\u3066\u3044\u304d\u307e\u3059
\n\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306ffollowed_id\u304c\u3042\u308c\u3070\u8b58\u5225\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3001<\/p>\n
\u5148\u307b\u3069\u306efollowing\u30c6\u30fc\u30d6\u30eb\u3092active_relationships\u30c6\u30fc\u30d6\u30eb
\n\u3068\u898b\u7acb\u3066\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u305f\u3060\u3057\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u306f\u7121\u99c4\u306a\u306e\u3067\u3001\u30e6\u30fc\u30b6\u30fcid\u4ee5\u5916\u306e\u60c5\u5831\u306f\u524a\u9664\u3057\u307e\u3059\u3002\u305d\u3057\u3066\u3001followed_id\u3092\u901a\u3057\u3066\u3001
\nusers\u30c6\u30fc\u30d6\u30eb\u306e\u30d5\u30a9\u30ed\u30fc\u3055\u308c\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u3092\u898b\u3064\u3051\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n
\u30c6\u30fc\u30d6\u30eb\u540d\u306b\u306f\u3053\u306e\u300c\u95a2\u4fc2\u300d\u3092\u8868\u3059\u300crelationships\u300d\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002\u30e2\u30c7\u30eb\u540d\u306fRails\u306e\u6163\u7fd2\u306b\u306a\u3089\u3063\u3066\u3001Relationship\u3068\u3057\u307e\u3059\u3002<\/p>\n
<\/p>\n
\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n
rails generate model Relationship follower_id:integer followed_id:integer<\/strong><\/pre>\n
\u3053\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u306f\u4eca\u5f8cfollower_id<\/strong>\u3068followed_id<\/strong>\u3067\u983b\u7e41\u306b
\n\u691c\u7d22\u3059\u308b\u3053\u3068\u306b\u306a\u308b\u306e\u3067\u3001\u305d\u308c\u305e\u308c\u306e\u30ab\u30e9\u30e0\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n
relationships\u30c6\u30fc\u30d6\u30eb\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8ffd\u52a0\u3059\u308b
\ndb\/migrate\/[timestamp]_create_relationships.rb<\/strong><\/p>\n
class<\/span> CreateRelationships<\/span> <<\/span> ActiveRecord<\/span>::<\/span>Migration<\/span>[<\/span>5<\/span>.<\/span>1<\/span>]<\/span>\r\n  def<\/span> change<\/span>\r\n    create_table<\/span> :relationships<\/span> do<\/span> |<\/span>t<\/span>|<\/span>\r\n      t<\/span>.<\/span>integer<\/span> :follower_id<\/span>\r\n      t<\/span>.<\/span>integer<\/span> :followed_id<\/span>\r\n\r\n      t<\/span>.<\/span>timestamps<\/span>\r\n    end<\/span>\r\n    add_index<\/span> :relationships<\/span>,<\/span> :follower_id<\/span>\r\n<\/span>    add_index<\/span> :relationships<\/span>,<\/span> :followed_id<\/span>\r\n<\/span>    add_index<\/span> :relationships<\/span>,<\/span> [<\/span>:follower_id<\/span>,<\/span> :followed_id<\/span>]<\/span>,<\/span> unique<\/span>:<\/span> true<\/span>\r\n<\/span>  end<\/span>\r\nend<\/span><\/strong><\/pre>\n
\u8907\u5408\u30ad\u30fc\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3068\u3044\u3046\u884c\u3082\u3042\u308b\u3053\u3068\u306b\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\u3002
\n\u3053\u308c\u306f\u3001follower_id\u3068followed_id\u306e\u7d44\u307f\u5408\u308f\u305b\u304c\u5fc5\u305a\u30e6\u30cb\u30fc\u30af\u3067\u3042\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n
\u3053\u308c\u306b\u3088\u308a\u3001\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u304c\u540c\u3058\u30e6\u30fc\u30b6\u30fc\u30922\u56de\u4ee5\u4e0a\u30d5\u30a9\u30ed\u30fc\u3059\u308b\u3053\u3068\u3092\u9632\u304e\u307e\u3059\u3002\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u5074\u306e\u5b9f\u88c5\u3067\u3082\u6ce8\u610f\u3092\u6255\u3044\u307e\u3059\u3002<\/p>\n
relationships\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306b\u3001
\n\u3044\u3064\u3082\u306e\u3088\u3046\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n
rails db:migrate<\/strong><\/pre>\n
\u6f14\u7fd2<\/h3>\n
1:id=1\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u5bfe\u3057\u3066user.following.map(&:id)\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001
\n\u7d50\u679c\u306f\u3069\u306e\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u304b? \u60f3\u50cf\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002
\nmap(&:method_name)\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u601d\u3044\u51fa\u3057\u3066\u304f\u3060\u3055\u3044\u3002
\n\u4f8b\u3048\u3070user.following.map(&:id)\u306e\u5834\u5408\u3001id\u306e\u914d\u5217\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
user.following.map(id:1)<\/strong>\r\n2<\/strong>\r\n7<\/strong>\r\n10<\/strong>\r\n8<\/strong><\/pre>\n
\u5f15\u6570\u3067\u53d7\u3051\u53d6\u3063\u305fid=1\u306b\u30d5\u30a9\u30ed\u30fc\u3055\u308c\u3066\u3044\u308b
\n\u30e6\u30fc\u30b6\u30fc(id: 2,7,10,8)\u306eid\u3092\u305d\u308c\u305e\u308c\uff11\u3064\u305a\u3064\u8fd4\u3059<\/p>\n
2:id=2\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u5bfe\u3057\u3066user.following\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001
\n\u7d50\u679c\u306f\u3069\u306e\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u304b?
\n\u307e\u305f\u3001\u540c\u3058\u30e6\u30fc\u30b6\u30fc\u306b\u5bfe\u3057\u3066user.following.map(&:id)\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001
\n\u7d50\u679c\u306f\u3069\u306e\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u304b? \u60f3\u50cf\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
user.following(id:2)<\/strong>\r\n=> [id:1,name:Michael Hartl,email:mhartl@example.com]<\/strong>\r\n>> user.following.map(id:2)<\/strong>\r\n=> 1<\/strong><\/pre>\n
14.1.2 User\/Relationship\u306e\u95a2\u9023\u4ed8\u3051<\/h3>\n
User\u3068Relationship\u306e\u95a2\u9023\u4ed8\u3051\u3092\u884c\u3044\u307e\u3059\u3002
\n1\u4eba\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u306fhas_many (1\u5bfe\u591a) \u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u304c\u3042\u308a\u3001
\n\u3053\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u306f2\u4eba\u306e\u30e6\u30fc\u30b6\u30fc\u306e\u9593\u306e\u95a2\u4fc2\u306a\u306e\u3067\u3001
\n\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u3068\u30d5\u30a9\u30ed\u30ef\u30fc\u306e\u4e21\u65b9\u306b\u5c5e\u3057\u307e\u3059 (belongs_to)\u3002<\/p>\n
microposts<\/code>\u30c6\u30fc\u30d6\u30eb\u306b\u306fuser_id<\/code>\u5c5e\u6027\u304c\u3042\u308b\u306e\u3067\u3001\u3053\u308c\u3092\u8fbf\u3063\u3066\u5bfe\u5fdc\u3059\u308b\u6240\u6709\u8005 (\u30e6\u30fc\u30b6\u30fc) \u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002
\n\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e2\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u7e4b\u3050\u3068\u304d\u3001
\n\u3053\u306e\u3088\u3046\u306aid\u306f\u5916\u90e8\u30ad\u30fc(foreign key)\u3068\u547c\u3073\u307e\u3059\u3002
\n\u3059\u306a\u308f\u3061\u3001User\u30e2\u30c7\u30eb\u306b\u7e4b\u3052\u308b\u5916\u90e8\u30ad\u30fc\u304c\u3001
\nMicropost\u30e2\u30c7\u30eb\u306euser_id\u5c5e\u6027\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n
\u3053\u306e\u5916\u90e8\u30ad\u30fc\u306e\u540d\u524d\u3092\u4f7f\u3063\u3066\u3001Rails\u306f\u95a2\u9023\u4ed8\u3051\u306e\u63a8\u6e2c\u3092\u3057\u3066\u3044\u307e\u3059\u3002
\n\u5177\u4f53\u7684\u306b\u306f\u3001Rails\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u5916\u90e8\u30ad\u30fc\u306e\u540d\u524d\u3092<class>_id\u3068\u3044\u3063\u305f\u30d1\u30bf\u30fc\u30f3\u3068\u3057\u3066\u7406\u89e3\u3057\u3001 <class>\u306b\u5f53\u305f\u308b\u90e8\u5206\u304b\u3089\u30af\u30e9\u30b9\u540d
\n(\u6b63\u78ba\u306b\u306f\u5c0f\u6587\u5b57\u306b\u5909\u63db\u3055\u308c\u305f\u30af\u30e9\u30b9\u540d) \u3092\u63a8\u6e2c\u3057\u307e\u3059\u3002<\/p>\n
\u305f\u3060\u3057\u3001\u5148\u307b\u3069\u306f\u30e6\u30fc\u30b6\u30fc\u3092\u4f8b\u3068\u3057\u3066\u6271\u3044\u307e\u3057\u305f\u304c\u3001
\n\u4eca\u56de\u306e\u30b1\u30fc\u30b9\u3067\u306f\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u3092follower_id\u3068\u3044\u3046\u5916\u90e8\u30ad\u30fc\u3092\u4f7f\u3063\u3066\u7279\u5b9a\u3057\u306a\u304f\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002
\n\u307e\u305f\u3001follower\u3068\u3044\u3046\u30af\u30e9\u30b9\u540d\u306f\u5b58\u5728\u3057\u306a\u3044\u306e\u3067\u3001
\n\u3053\u3053\u3067\u3082Rails\u306b\u6b63\u3057\u3044\u30af\u30e9\u30b9\u540d\u3092\u4f1d\u3048\u308b\u5fc5\u8981\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n
\u5148\u307b\u3069\u306e\u8aac\u660e\u3092\u30b3\u30fc\u30c9\u306b\u307e\u3068\u3081\u308b\u3068\u3001
\nUser\u3068Relationship\u306e\u95a2\u9023\u4ed8\u3051\u306f\u2193\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u80fd\u52d5\u7684\u95a2\u4fc2\u306b\u5bfe\u3057\u30661\u5bfe\u591a (has_many) \u306e\u95a2\u9023\u4ed8\u3051\u3092\u5b9f\u88c5\u3059\u308b
\napp\/models\/user.rb<\/strong><\/p>\n
class<\/span> User<\/span> <<\/span> ApplicationRecord<\/span>\r\n  has_many<\/span> :microposts<\/span>,<\/span> dependent<\/span>:<\/span> :destroy<\/span>\r\n  has_many<\/span> :active_relationships<\/span>,<\/span> class_name<\/span>:<\/span>  \"Relationship\"<\/span>,<\/span>\r\n<\/span>                                  foreign_key<\/span>:<\/span> \"follower_id\"<\/span>,<\/span>\r\n<\/span>                                  dependent<\/span>:<\/span>   :destroy<\/span>\r\n<\/span>  .<\/span>\r\n  .<\/span>\r\n  .<\/span>\r\nend<\/span><\/strong><\/pre>\n
\u30e6\u30fc\u30b6\u30fc\u3092\u524a\u9664\u3057\u305f\u3089\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u3082\u540c\u6642\u306b\u524a\u9664\u3055\u308c\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u305d\u306e\u305f\u3081\u3001\u95a2\u9023\u4ed8\u3051\u306bdependent: :destroy\u3082\u8ffd\u52a0\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\/\u30d5\u30a9\u30ed\u30ef\u30fc\u306b\u5bfe\u3057\u3066belongs_to\u306e\u95a2\u9023\u4ed8\u3051\u3092\u8ffd\u52a0\u3059\u308b
\napp\/models\/relationship.rb<\/strong><\/p>\n
class Relationship < ApplicationRecord<\/strong>\r\n  belongs_to :follower, class_name: \"User\"<\/strong>\r\n  belongs_to :followed, class_name: \"User\"<\/strong>\r\nend<\/strong><\/pre>\n
\u4e0a\u3067\u5b9a\u7fa9\u3057\u305f\u95a2\u9023\u4ed8\u3051\u306b\u3088\u308a\u3001\u4ee5\u524d\u7d39\u4ecb\u3057\u305f\u3088\u3046\u306a\u591a\u304f\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
         \u30e1\u30bd\u30c3\u30c9\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000        \u7528\u9014<\/strong>\r\nactive_relationship.follower                                 \u30d5\u30a9\u30ed\u30ef\u30fc\u3092\u8fd4\u3057\u307e\u3059<\/strong>\r\n\r\nactive_relationship.followed                                 \u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u3092\u8fd4\u3057\u307e\u3059<\/strong>\r\n\r\nuser.active_relationships.create(followed_id:other_user.id)\u3000 user\u3068\u7d10\u4ed8\u3051\u3066\u80fd\u52d5\u7684\u95a2\u4fc2\u3092\u4f5c\u6210\/\u767b\u9332\u3059\u308b<\/strong>\r\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000<\/strong>\r\nuser.active_relationships.create!(followed_id: other_user.id) user\u3092\u7d10\u4ed8\u3051\u3066\u80fd\u52d5\u7684\u95a2\u4fc2\u3092\u4f5c\u6210\/\u767b\u9332\u3059\u308b (\u5931\u6557\u6642\u306b\u30a8\u30e9\u30fc\u3092\u51fa\u529b)<\/strong>\r\n\r\nuser.active_relationships.build(followed_id: other_user.id)   user\u3068\u7d10\u4ed8\u3051\u305f\u65b0\u3057\u3044Relationship\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059<\/strong><\/pre>\n
\u6f14\u7fd2<\/h3>\n
1:\u30b3\u30f3\u30bd\u30fc\u30eb\u3092\u958b\u304d\u3001create\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066ActiveRelationship\u3092
\n\u4f5c\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u4e0a\u306b\uff12\u4eba\u4ee5\u4e0a\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u7528\u610f\u3057\u3001
\n\u6700\u521d\u306e\u30e6\u30fc\u30b6\u30fc\u304c\uff12\u4eba\u76ee\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u72b6\u614b\u3092\u4f5c\u3063\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
user = User.first<\/strong>\r\nusage = User.last<\/strong>\r\n\r\nuser.active_relationships.create(followed_id: 2)<\/strong>\r\n(0.1ms) begin transaction<\/strong>\r\nUser Load (0.6ms) SELECT \"users\".* FROM \"users\" WHERE \"users\".\"id\" = ? LIMIT ? [[\"id\", 1], [\"LIMIT\", 1]]<\/strong>\r\nUser Load (0.1ms) SELECT \"users\".* FROM \"users\" WHERE \"users\".\"id\" = ? LIMIT ? [[\"id\", 2], [\"LIMIT\", 1]]<\/strong>\r\nSQL (4.1ms) INSERT INTO \"relationships\" (\"follower_id\", \"followed_id\", \"created_at\", \"updated_at\") VALUES (?, ?, ?, ?) [[\"follower_id\", 1], [\"followed_id\", 2], [\"created_at\", \"2020-04-11 06:06:56.970355\"], [\"updated_at\", \"2020-04-11 06:06:56.970355\"]]<\/strong>\r\n(8.9ms) commit transaction<\/strong>\r\n=> #<Relationship id: 1, follower_id: 1, followed_id: 2, created_at: \"2020-04-11 06:06:56\", updated_at: \"2020-04-11 06:06:56\"><\/strong><\/pre>\n
2:\u5148\u307b\u3069\u306e\u6f14\u7fd2\u3092\u7d42\u3048\u305f\u3089\u3001active_relationship.followed\u306e\u5024
\n\u3068active_relationship.follower\u306e\u5024\u3092\u78ba\u8a8d\u3057\u3001
\n\u305d\u308c\u305e\u308c\u306e\u5024\u304c\u6b63\u3057\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
Relationship id: 1, follower_id: 1, followed_id: 2,<\/strong>\r\n\u306a\u306e\u3067OK<\/pre>\n
14.1.3 Relationship\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/h3>\n
Relationship\u30e2\u30c7\u30eb\u306e\u691c\u8a3c\u3092\u8ffd\u52a0\u3057\u3066\u5b8c\u5168\u306a\u3082\u306e\u306b\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u306f\u7d20\u76f4\u306a\u4f5c\u308a\u3067\u3059\u3002
\n\u305f\u3060\u3057\u3001User\u7528\u306efixture\u30d5\u30a1\u30a4\u30eb\u3068\u540c\u3058\u3088\u3046\u306b\u3001
\n\u751f\u6210\u3055\u308c\u305fRelationship\u7528\u306efixture\u3067\u306f\u3001
\n\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u3067\u5236\u7d04\u3055\u305b\u305f\u4e00\u610f\u6027\u3092\u6e80\u305f\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n
\n
Relationship\u30e2\u30c7\u30eb\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u30c6\u30b9\u30c8\u3059\u308btest\/models\/relationship_test.rb<\/code><\/strong><\/span><\/div>\n
\n
\n
require<\/span> 'test_helper'<\/span>\r\n\r\nclass<\/span> RelationshipTest<\/span> <<\/span> ActiveSupport<\/span>::<\/span>TestCase<\/span>\r\n\r\n  def<\/span> setup<\/span>\r\n    @relationship<\/span> =<\/span> Relationship<\/span>.<\/span>new<\/span>(<\/span>follower_id<\/span>:<\/span> users<\/span>(<\/span>:michael<\/span>)<\/span>.<\/span>id<\/span>,<\/span>\r\n                                     followed_id<\/span>:<\/span> users<\/span>(<\/span>:archer<\/span>)<\/span>.<\/span>id<\/span>)<\/span>\r\n  end<\/span>\r\n\r\n  test<\/span> \"should be valid\"<\/span> do<\/span>\r\n    assert<\/span> @relationship<\/span>.<\/span>valid?<\/span>\r\n  end<\/span>\r\n\r\n  test<\/span> \"should require a follower_id\"<\/span> do<\/span>\r\n    @relationship<\/span>.<\/span>follower_id<\/span> =<\/span> nil<\/span>\r\n    assert_not<\/span> @relationship<\/span>.<\/span>valid?<\/span>\r\n  end<\/span>\r\n\r\n  test<\/span> \"should require a followed_id\"<\/span> do<\/span>\r\n    @relationship<\/span>.<\/span>followed_id<\/span> =<\/span> nil<\/span>\r\n    assert_not<\/span> @relationship<\/span>.<\/span>valid?<\/span>\r\n  end<\/span>\r\nend<\/span>\r\n<\/strong><\/pre>\n<\/div>\n<\/div>\n<\/div>\n
\n
Relationship\u30e2\u30c7\u30eb\u306b\u5bfe\u3057\u3066\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u8ffd\u52a0\u3059\u308bapp\/models\/relationship.rb<\/code><\/strong><\/span><\/div>\n
\n
\n
class<\/span> Relationship<\/span> <<\/span> ApplicationRecord<\/span>\r\n  belongs_to<\/span> :follower<\/span>,<\/span> class_name<\/span>:<\/span> \"User\"<\/span>\r\n  belongs_to<\/span> :followed<\/span>,<\/span> class_name<\/span>:<\/span> \"User\"<\/span>\r\n  validates<\/span> :follower_id<\/span>,<\/span> presence<\/span>:<\/span> true<\/span>\r\n<\/span>  validates<\/span> :followed_id<\/span>,<\/span> presence<\/span>:<\/span> true<\/span>\r\n<\/span>end<\/span><\/strong><\/pre>\n<\/div>\n<\/div>\n<\/div>\n
Relationship\u7528\u306efixture\u3092\u7a7a\u306b\u3059\u308b\u00a0green<\/strong><\/span><\/span><\/div>\n
test\/fixtures\/relationships.yml<\/code><\/span><\/strong><\/div>\n
\n
\n
# \u7a7a\u306b\u3059\u308b<\/span><\/strong><\/pre>\n<\/div>\n<\/div>\n
\u30c6\u30b9\u30c8\u306f\u00a0green<\/strong><\/span>\u306b\u306a\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n
\n
\n
\n
rails test<\/strong><\/pre>\n<\/div>\n<\/div>\n<\/div>\n
\u6f14\u7fd2<\/h3>\n
\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3092\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3057\u3066\u3082\u3001\u30c6\u30b9\u30c8\u304c\u6210\u529f\u3057\u305f\u307e\u307e\u306b
\n\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002
\n(\u4ee5\u524d\u306eRails\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u3001\u3053\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u304c\u5fc5\u9808\u3067\u3057\u305f\u304c\u3001Rails 5\u304b\u3089\u5fc5\u9808\u3067\u306f\u306a\u304f\u306a\u308a\u307e\u3057\u305f\u3002
\n\u4eca\u56de\u306f\u30d5\u30a9\u30ed\u30fc\u6a5f\u80fd\u306e\u5b9f\u88c5\u3092\u512a\u5148\u3057\u307e\u3059\u304c\u3001
\n\u3053\u306e\u624b\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u304c\u7701\u7565\u3055\u308c\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u3092\u982d\u306e\u7247\u9685\u3067\u899a\u3048\u3066\u304a\u304f\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002)<\/p>\n
Green\u3060\u3063\u305f<\/p>\n
14.1.4 \u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc<\/h3>\n
following\u3068followers\u306b\u53d6\u308a\u304b\u304b\u308a\u307e\u3059\u3002
\n\u4eca\u56de\u306fhas_many through\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n
1\u4eba\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u306f\u3044\u304f\u3064\u3082\u306e\uff62\u30d5\u30a9\u30ed\u30fc\u3059\u308b\uff63\uff62\u30d5\u30a9\u30ed\u30fc\u3055\u308c\u308b\uff63\u3068\u3044\u3063\u305f\u95a2\u4fc2\u6027\u304c\u3042\u308a\u307e\u3059 (\u3053\u3046\u3044\u3063\u305f\u95a2\u4fc2\u6027\u3092\uff62\u591a\u5bfe\u591a\uff63\u3068\u547c\u3073\u307e\u3059)\u3002
\n\u30c7\u30d5\u30a9\u30eb\u30c8\u306ehas_many through\u3068\u3044\u3046\u95a2\u9023\u4ed8\u3051\u3067\u306f\u3001
\nRails\u306f\u30e2\u30c7\u30eb\u540d(\u5358\u6570\u5f62) \u306b\u5bfe\u5fdc\u3059\u308b\u5916\u90e8\u30ad\u30fc\u3092\u63a2\u3057\u307e\u3059\u3002
\n\u3064\u307e\u308a\u3001\u6b21\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001<\/p>\n
has_many :followeds, through: :active_relationships<\/strong><\/pre>\n
Rails\u306f\u300cfolloweds\u300d\u3068\u3044\u3046\u30b7\u30f3\u30dc\u30eb\u540d\u3092\u898b\u3066\u3001
\n\u3053\u308c\u3092\u300cfollowed\u300d\u3068\u3044\u3046\u5358\u6570\u5f62\u306b\u5909\u3048\u3001
\nrelationships\u30c6\u30fc\u30d6\u30eb\u306efollowed_id\u3092\u4f7f\u3063\u3066\u5bfe\u8c61\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u53d6\u5f97\u3057\u3066\u304d\u307e\u3059\u3002<\/p>\n
user.followeds\u3068\u3044\u3046\u540d\u524d\u306f\u82f1\u8a9e\u3068\u3057\u3066\u4e0d\u9069\u5207\u3067\u3059\u3002
\n\u4ee3\u308f\u308a\u306b\u3001user.following\u3068\u3044\u3046\u540d\u524d\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002
\n\u305d\u306e\u305f\u3081\u306b\u306f\u3001Rails\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u3092\u4e0a\u66f8\u304d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
:source\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u3092\u4f7f\u3063\u3066\u3001\u300cfollowing\u914d\u5217\u306e\u5143\u306f
\nfollowed id\u306e\u96c6\u5408\u3067\u3042\u308b\u300d\u3068\u3044\u3046\u3053\u3068\u3092\u660e\u793a\u7684\u306bRails\u306b\u4f1d\u3048\u307e\u3059\u3002<\/p>\n
User\u30e2\u30c7\u30eb\u306bfollowing\u306e\u95a2\u9023\u4ed8\u3051\u3092\u8ffd\u52a0\u3059\u308b
\napp\/models\/user.rb<\/strong><\/p>\n
class<\/span> User<\/span> <<\/span> ApplicationRecord<\/span>\r\n  has_many<\/span> :microposts<\/span>,<\/span> dependent<\/span>:<\/span> :destroy<\/span>\r\n  has_many<\/span> :active_relationships<\/span>,<\/span> class_name<\/span>:<\/span>  \"Relationship\"<\/span>,<\/span>\r\n                                  foreign_key<\/span>:<\/span> \"follower_id\"<\/span>,<\/span>\r\n                                  dependent<\/span>:<\/span>   :destroy<\/span>\r\n  has_many<\/span> :following<\/span>,<\/span> through<\/span>:<\/span> :active_relationships<\/span>,<\/span> source<\/span>:<\/span> :followed<\/span>\r\n<\/span>  .<\/span>\r\n  .<\/span>\r\n  .<\/span>\r\nend<\/span><\/strong><\/pre>\n
\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u3092\u914d\u5217\u306e\u69d8\u306b\u6271\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002
\n\u4f8b\u3048\u3070\u3001include?\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306e\u96c6\u5408\u3092\u8abf\u3079\u3066\u307f\u305f\u308a\u3001\u95a2\u9023\u4ed8\u3051\u3092\u901a\u3057\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u63a2\u3057\u3060\u305b\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
user.following.include?(other_user)<\/strong>\r\nuser.following.find(other_user)<\/strong><\/pre>\n
following\u3067\u53d6\u5f97\u3057\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001
\n\u914d\u5217\u306e\u3088\u3046\u306b\u8981\u7d20\u3092\u8ffd\u52a0\u3057\u305f\u308a\u524a\u9664\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
user.following << other_user<\/strong>\r\nuser.following.delete(other_user)<\/strong><\/pre>\n
following\u30e1\u30bd\u30c3\u30c9\u3067\u914d\u5217\u306e\u3088\u3046\u306b\u6271\u3048\u308b\u3060\u3051\u3067\u3082\u4fbf\u5229\u3067\u3059\u304c\u3001
\nRails\u306f\u5358\u7d14\u306a\u914d\u5217\u3067\u306f\u306a\u304f\u3001\u3082\u3063\u3068\u8ce2\u304f\u3053\u306e\u96c6\u5408\u3092\u6271\u3063\u3066\u3044\u307e\u3059\u3002
\n\u4f8b\u3048\u3070\u6b21\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3067\u306f\u3001<\/p>\n
following.include?(other_user)<\/strong><\/pre>\n
follow\u3084unfollow\u3068\u3044\u3063\u305f\u4fbf\u5229\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3057\u307e\u3057\u3087\u3046\u3002
\n\u3053\u308c\u3089\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u4f8b\u3048\u3070user.follow(other_user)\u3068\u3044\u3063\u305f\u5177\u5408\u306b
\n\u4f7f\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u3053\u308c\u306b\u95a2\u9023\u3059\u308bfollowing?\u8ad6\u7406\u5024\u30e1\u30bd\u30c3\u30c9\u3082\u8ffd\u52a0\u3057\u3001\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u304c\u8ab0\u304b\u3092\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n
1:following?\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u3092\u307e\u3060\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\r\n\r\n2:follow\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u305d\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc\u3001\r\n\r\n3:following?\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30d5\u30a9\u30ed\u30fc\u4e2d\u306b\u306a\u3063\u305f\u3053\u3068\u3092\u78ba\u8a8d\u3001\r\n\r\n4:\u6700\u5f8c\u306bunfollow\u30e1\u30bd\u30c3\u30c9\u3067\u30d5\u30a9\u30ed\u30fc\u89e3\u9664\u3067\u304d\u305f\u3053\u3068\u3092\u78ba\u8a8d\u3001\r\n\u3068\u3044\u3063\u305f\u5177\u5408\u3067\u30c6\u30b9\u30c8\u3092\u3057\u3066\u304d\u307e\u3059\u3002<\/pre>\n
\u201cfollowing\u201d \u95a2\u9023\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u30c6\u30b9\u30c8\u3059\u308b red
\ntest\/models\/user_test.rb<\/strong><\/p>\n
require<\/span> 'test_helper'<\/span>\r\n\r\nclass<\/span> UserTest<\/span> <<\/span> ActiveSupport<\/span>::<\/span>TestCase<\/span>\r\n  .<\/span>\r\n  .<\/span>\r\n  .<\/span>\r\n  test<\/span> \"should follow and unfollow a user\"<\/span> do<\/span>\r\n    michael<\/span> =<\/span> users<\/span>(<\/span>:michael<\/span>)<\/span>\r\n    archer<\/span>  =<\/span> users<\/span>(<\/span>:archer<\/span>)<\/span>\r\n    assert_not<\/span> michael<\/span>.<\/span>following?<\/span>(<\/span>archer<\/span>)<\/span>\r\n    michael<\/span>.<\/span>follow<\/span>(<\/span>archer<\/span>)<\/span>\r\n    assert<\/span> michael<\/span>.<\/span>following?<\/span>(<\/span>archer<\/span>)<\/span>\r\n    michael<\/span>.<\/span>unfollow<\/span>(<\/span>archer<\/span>)<\/span>\r\n    assert_not<\/span> michael<\/span>.<\/span>following?<\/span>(<\/span>archer<\/span>)<\/span>\r\n  end<\/span>\r\nend<\/span><\/strong><\/pre>\n
following\u306b\u3088\u308b\u95a2\u9023\u4ed8\u3051\u3092\u4f7f\u3063\u3066follow\u3001unfollow\u3001following?\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046
\n\u3053\u306e\u3068\u304d\u3001\u53ef\u80fd\u306a\u9650\u308aself (user\u81ea\u8eab\u3092\u8868\u3059\u30aa\u30d6\u30b8\u30a7\u30af\u30c8)
\n\u3092\u7701\u7565\u3057\u3066\u3044\u308b\u70b9\u306b\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
“following” \u95a2\u9023\u306e\u30e1\u30bd\u30c3\u30c9 green
\napp\/models\/user.rb<\/strong><\/p>\n
class<\/span> User<\/span> <<\/span> ApplicationRecord<\/span>\r\n  .<\/span>\r\n  .<\/span>\r\n  .<\/span>   \r\n\u00a0 \u00a0# \u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc\u3059\u308b<\/span>\r\n  def<\/span> follow<\/span>(<\/span>other_user<\/span>)<\/span>\r\n    following<\/span> <<<\/span> other_user<\/span>\r\n<\/span>  end<\/span>\r\n\r\n  # \u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc\u89e3\u9664\u3059\u308b<\/span>\r\n  def<\/span> unfollow<\/span>(<\/span>other_user<\/span>)<\/span>\r\n    active_relationships<\/span>.<\/span>find_by<\/span>(<\/span>followed_id<\/span>:<\/span> other_user<\/span>.<\/span>id<\/span>)<\/span>.<\/span>destroy<\/span>\r\n<\/span>  end<\/span>\r\n\r\n  # \u73fe\u5728\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u305f\u3089true\u3092\u8fd4\u3059<\/span>\r\n  def<\/span> following?<\/span>(<\/span>other_user<\/span>)<\/span>\r\n    following<\/span>.<\/span>include?<\/span>(<\/span>other_user<\/span>)<\/span>\r\n<\/span>  end<\/span>\r\n\r\n  private<\/span>\r\n  .<\/span>\r\n  .<\/span>\r\n  .<\/span>\r\nend<\/span><\/strong><\/pre>\n
green<\/strong><\/span><\/span><\/div>\n
\n
\n
rails test<\/strong><\/pre>\n<\/div>\n<\/div>\n
\u6f14\u7fd2<\/h3>\n
1:\u30b3\u30f3\u30bd\u30fc\u30eb\u3092\u958b\u304d\u3001\u5148\u306euser_test.rb\u306e\u30b3\u30fc\u30c9\u3092\u9806\u3005\u306b\u5b9f\u884c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
michael = User.find(3)<\/strong>\r\narcher = User.find(4)<\/strong>\r\nmichael.following?(archer) => false<\/strong>\r\nmichael.follow(archer)<\/strong>\r\nmichael.following?(archer) => true<\/strong>\r\n\r\nmichael.unfollow(archer)<\/strong>\r\nRelationship Load (0.2ms) SELECT \"relationships\".* FROM \"relationships\" WHERE \"relationships\".\"follower_id\" = ? AND \"relationships\".\"followed_id\" = ? LIMIT ? [[\"follower_id\", 3], [\"followed_id\", 4], [\"LIMIT\", 1]]<\/strong>\r\n(0.0ms) begin transaction<\/strong>\r\nSQL (1.4ms) DELETE FROM \"relationships\" WHERE \"relationships\".\"id\" = ? [[\"id\", 2]]<\/strong>\r\n\r\nmichael.following?(archer) => false<\/strong>\r\nUser Exists (0.2ms) SELECT 1 AS one FROM \"users\" INNER JOIN \"relationships\" ON \"users\".\"id\" = \"relationships\".\"followed_id\" WHERE \"relationships\".\"follower_id\" = ? AND \"users\".\"id\" = ? LIMIT ? [[\"follower_id\", 3], [\"id\", 4], [\"LIMIT\", 1]]<\/strong>\r\n=> false<\/strong><\/pre>\n
2:\u5148\u307b\u3069\u306e\u6f14\u7fd2\u306e\u5404\u30b3\u30de\u30f3\u30c9\u5b9f\u884c\u6642\u306e\u7d50\u679c\u3092\u898b\u8fd4\u3057\u3066\u307f\u3066\u3001
\n\u5b9f\u969b\u306b\u306f\u3069\u3093\u306aSQL\u304c\u51fa\u529b\u3055\u308c\u305f\u306e\u304b\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
 SQL (0.4ms)  DELETE FROM \"relationships\" WHERE \"relationships\".\"id\" = ?<\/strong><\/pre>\n
14.1.5 \u30d5\u30a9\u30ed\u30ef\u30fc<\/h3>\n
\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u3068\u3044\u3046\u30d1\u30ba\u30eb\u306e\u6700\u5f8c\u306e\u4e00\u7247\u306f\u3001
\nuser.followers\u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u3059\u3002
\n\u3053\u308c\u306f\u4e0a\u306euser.following\u30e1\u30bd\u30c3\u30c9\u3068\u5bfe\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u30d5\u30a9\u30ed\u30ef\u30fc\u306e\u914d\u5217\u3092\u5c55\u958b\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u60c5\u5831\u306f\u3001
\nrelationships\u30c6\u30fc\u30d6\u30eb\u306b\u65e2\u306b\u3042\u308a\u307e\u3059\u3002
\n\u3064\u307e\u308a\u3001\u4f5c\u6210\u3057\u305factive_relationships\u306e\u30c6\u30fc\u30d6\u30eb\u3092\u518d\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u305d\u3046\u3067\u3059\u3002
\n\u5b9f\u969b\u3001follower_id\u3068followed_id\u3092\u5165\u308c\u66ff\u3048\u308b\u3060\u3051\u3067\u3001
\n\u30d5\u30a9\u30ed\u30ef\u30fc\u306b\u3064\u3044\u3066\u3082\u30d5\u30a9\u30ed\u30fc\u3059\u308b\u5834\u5408\u3068\u5168\u304f\u540c\u3058\u65b9\u6cd5\u304c\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u306e\u5b9f\u88c5\u3092\u2193\u306b\u793a\u3057\u307e\u3059\u304c\u3001
\n\u3053\u306e\u5b9f\u88c5\u306f\u524d\u5b9f\u88c5\u3057\u305f\u3082\u306e\u3068\u307e\u3055\u306b\u985e\u4f3c\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u53d7\u52d5\u7684\u95a2\u4fc2\u3092\u4f7f\u3063\u3066user.followers<\/code>\u3092\u5b9f\u88c5\u3059\u308bapp\/models\/user.rb<\/code><\/strong><\/span><\/div>\n
\n
\n
class<\/span> User<\/span> <<\/span> ApplicationRecord<\/span>\r\n  has_many<\/span> :microposts<\/span>,<\/span> dependent<\/span>:<\/span> :destroy<\/span>\r\n  has_many<\/span> :active_relationships<\/span>,<\/span>  class_name<\/span>:<\/span>  \"Relationship\"<\/span>,<\/span>\r\n                                   foreign_key<\/span>:<\/span> \"follower_id\"<\/span>,<\/span>\r\n                                   dependent<\/span>:<\/span>   :destroy<\/span>\r\n  has_many<\/span> :passive_relationships<\/span>,<\/span> class_name<\/span>:<\/span>  \"Relationship\"<\/span>,<\/span>\r\n<\/span>                                   foreign_key<\/span>:<\/span> \"followed_id\"<\/span>,<\/span>\r\n<\/span>                                   dependent<\/span>:<\/span>   :destroy<\/span>\r\n<\/span>  has_many<\/span> :following<\/span>,<\/span> through<\/span>:<\/span> :active_relationships<\/span>,<\/span>  source<\/span>:<\/span> :followed<\/span>\r\n  has_many<\/span> :followers<\/span>,<\/span> through<\/span>:<\/span> :passive_relationships<\/span>,<\/span> source<\/span>:<\/span> :follower<\/span>\r\n<\/span>  .<\/span>\r\n  .<\/span>\r\n  .<\/span>\r\nend<\/span><\/strong><\/pre>\n<\/div>\n<\/div>\n
\u6b21\u306e\u3088\u3046\u306b\u53c2\u7167\u5148 (followers) \u3092\u6307\u5b9a\u3059\u308b\u305f\u3081\u306e
\n:source\u30ad\u30fc\u3092\u7701\u7565\u3057\u3066\u3082\u3088\u304b\u3063\u305f\u3068\u3044\u3046\u70b9\u3067\u3059\u3002<\/p>\n
has_many :followers, through: :passive_relationships<\/strong><\/pre>\n
\u3053\u308c\u306f:followers\u5c5e\u6027\u306e\u5834\u5408\u3001Rails\u304c\u300cfollowers\u300d\u3092\u5358\u6570\u5f62\u306b\u3057\u3066
\n\u81ea\u52d5\u7684\u306b\u5916\u90e8\u30ad\u30fcfollower_id\u3092\u63a2\u3057\u3066\u304f\u308c\u308b\u304b\u3089\u3067\u3059\u3002
\n\u5fc5\u8981\u306e\u306a\u3044:source\u30ad\u30fc\u3092\u305d\u306e\u307e\u307e\u6b8b\u3057\u3066\u3044\u308b\u306e\u306f\u3001
\nhas_many :following\u3068\u306e\u985e\u4f3c\u6027\u3092\u5f37\u8abf\u3055\u305b\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n
followers.include?\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u5148\u307b\u3069\u306e\u30c7\u30fc\u30bf\u30e2\u30c7\u30eb\u3092\u30c6\u30b9\u30c8\u3057\u307e\u3059\u3002<\/p>\n
followers\u306b\u5bfe\u3059\u308b\u30c6\u30b9\u30c8 green
\ntest\/models\/user_test.rb<\/strong><\/p>\n
require<\/span> 'test_helper'<\/span>\r\n\r\nclass<\/span> UserTest<\/span> <<\/span> ActiveSupport<\/span>::<\/span>TestCase<\/span>\r\n  .<\/span>\r\n  .<\/span>\r\n  .<\/span>\r\n  test<\/span> \"should follow and unfollow a user\"<\/span> do<\/span>\r\n    michael<\/span>  =<\/span> users<\/span>(<\/span>:michael<\/span>)<\/span>\r\n    archer<\/span>   =<\/span> users<\/span>(<\/span>:archer<\/span>)<\/span>\r\n    assert_not<\/span> michael<\/span>.<\/span>following?<\/span>(<\/span>archer<\/span>)<\/span>\r\n    michael<\/span>.<\/span>follow<\/span>(<\/span>archer<\/span>)<\/span>\r\n    assert<\/span> michael<\/span>.<\/span>following?<\/span>(<\/span>archer<\/span>)<\/span>\r\n    assert<\/span> archer<\/span>.<\/span>followers<\/span>.<\/span>include?<\/span>(<\/span>michael<\/span>)<\/span>\r\n<\/span>    michael<\/span>.<\/span>unfollow<\/span>(<\/span>archer<\/span>)<\/span>\r\n    assert_not<\/span> michael<\/span>.<\/span>following?<\/span>(<\/span>archer<\/span>)<\/span>\r\n  end<\/span>\r\nend<\/span><\/strong><\/pre>\n
\u6f14\u7fd2<\/h3>\n
1:\u30b3\u30f3\u30bd\u30fc\u30eb\u3092\u958b\u304d\u3001\u4f55\u4eba\u304b\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u6700\u521d\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u72b6\u6cc1\u3092\u4f5c\u3063\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n
\u6700\u521d\u306e\u30e6\u30fc\u30b6\u30fc\u3092user\u3068\u3059\u308b\u3068\u3001user.followers.map(&:id)\u306e\u5024\u306f
\n\u3069\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u3067\u3057\u3087\u3046\u304b?<\/p>\n
user = User.first<\/strong>\r\nuser_second = User.secound<\/strong>\r\nuser.followers.map(&:id)<\/strong>\r\nUser Load (0.2ms) SELECT \"users\".* FROM \"users\" INNER JOIN \"relationships\" ON \"users\".\"id\" = \"relationships\".\"follower_id\" WHERE \"relationships\".\"followed_id\" = ? [[\"followed_id\", 1]]<\/strong>\r\n=> [5, 4]<\/strong><\/pre>\n
2:\u4e0a\u306e\u6f14\u7fd2\u304c\u7d42\u308f\u3063\u305f\u3089\u3001user.followers.count\u306e\u5b9f\u884c\u7d50\u679c\u304c\u3001\u5148\u307b\u3069\u30d5\u30a9\u30ed\u30fc\u3055\u305b\u305f\u30e6\u30fc\u30b6\u30fc\u6570\u3068\u4e00\u81f4\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/h3>\n
user.followers.count<\/strong>\r\n=> 2<\/strong><\/pre>\n
3:user.followers.count\u3092\u5b9f\u884c\u3057\u305f\u7d50\u679c\u3001\u51fa\u529b\u3055\u308c\u308bSQL\u6587\u306f\u3069\u306e\u3088\u3046\u306a\u5185\u5bb9\u306b\u306a\u3063\u3066\u3044\u308b\u3067\u3057\u3087\u3046\u304b?<\/h3>\n
(0.3ms) SELECT COUNT(*) FROM \"users\" INNER JOIN \"relationships\" ON \"users\".\"id\" = \"relationships\".\"follower_id\" WHERE \"relationships\".\"followed_id\" = ? [[\"followed_id\", 1]]<\/strong><\/pre>\n
\u307e\u305f\u3001user.followers.to_a.count\u306e\u5b9f\u884c\u7d50\u679c\u3068\u9055\u3063\u3066\u3044\u308b\u7b87\u6240\u306f\u3042\u308a\u307e\u3059\u304b? \u3082\u3057user\u306b100\u4e07\u4eba\u306e\u30d5\u30a9\u30ed\u30ef\u30fc\u304c\u3044\u305f\u5834\u5408\u3001
\n\u3069\u306e\u3088\u3046\u306a\u9055\u3044\u304c\u3042\u308b\u3067\u3057\u3087\u3046\u304b? \u8003\u3048\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
user.followers.to_a.count\r\n=> 2<\/pre>\n
\u30d5\u30a9\u30ed\u30ef\u30fc\u304c100\u4e07\u4eba\u3044\u305f\u3089\u305d\u306e\u307e\u307e100\u4e07\u3068\u8a00\u3046\u6570\u5024\u304c\u8fd4\u3055\u308c\u308b\u304c\u914d\u5217\u3092\u751f\u6210\u3059\u308b\u70ba\u3001\u6642\u9593\u304c\u639b\u304b\u308b\u3057DB\u306b\u3082\u8ca0\u62c5\u304c\u639b\u304b\u308b\u3002<\/p>\n
14.2\u306b\u7d9a\u304f<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
13\u7ae0\u304b\u3089\u7d9a\u304f \u7b2c14\u7ae0\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc\u3059\u308b \u4ed6\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u30d5\u30a9\u30ed\u30fc(\u304a\u3088\u3073\u30d5\u30a9\u30ed\u30fc\u89e3\u9664)\u3067\u304d\u308b\u30bd\u30fc\u30b7\u30e3\u30eb\u306a\u4ed5\u7d44\u307f\u306e\u8ffd\u52a0\u3068\u3001 \u30d5\u30a9\u30ed\u30fc\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u306e\u6295\u7a3f\u3092\u30b9\u30c6\u30fc\u30bf\u30b9\u30d5\u30a3\u30fc\u30c9\u306b\u8868\u793a\u3059\u308b\u6a5f\u80fd\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002 \u3053\u3053\u3067\u5b66\u3093\u3060 […]<\/p>\n","protected":false},"author":1,"featured_media":2764,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[27,13],"tags":[],"class_list":["post-2892","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming-note","category-rails"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/2892","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/comments?post=2892"}],"version-history":[{"count":9,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/2892\/revisions"}],"predecessor-version":[{"id":4583,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/posts\/2892\/revisions\/4583"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/media\/2764"}],"wp:attachment":[{"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/media?parent=2892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/categories?post=2892"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/suzutukiblog.com\/index.php\/wp-json\/wp\/v2\/tags?post=2892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}