Ruby on Rails\u3068GraphQL\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u73fe\u4ee3\u306eWeb\u958b\u767a\u306b\u304a\u3051\u308b\u5f37\u529b\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3068\u3057\u3066\u6ce8\u76ee\u3092\u96c6\u3081\u3066\u3044\u307e\u3059\u3002
\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001GraphQL\u3092Ruby on Rails\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u7d71\u5408\u3059\u308b\u65b9\u6cd5\u304b\u3089\u3001\u5927\u898f\u6a21\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u6d3b\u7528\u4e8b\u4f8b\u3001\u305d\u3057\u3066\u5c06\u6765\u306e\u5c55\u671b\u307e\u3067\u3001\u5305\u62ec\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u76ee\u6b21 <\/p>\n
Web\u958b\u767a\u306e\u4e16\u754c\u3067\u306f\u3001\u52b9\u7387\u7684\u3067\u67d4\u8edf\u306aAPI\u306e\u69cb\u7bc9\u304c\u5e38\u306b\u6c42\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002
\u305d\u3093\u306a\u4e2d\u3001Ruby on Rails\u3068GraphQL\u306e\u7d44\u307f\u5408\u308f\u305b\u304c\u6ce8\u76ee\u3092\u96c6\u3081\u3066\u3044\u307e\u3059\u3002
\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u9ad8\u3044\u751f\u7523\u6027\u3068\u67d4\u8edf\u306a\u30c7\u30fc\u30bf\u53d6\u5f97\u3092\u4e21\u7acb\u3055\u305b\u3001\u30e2\u30c0\u30f3\u306aWeb\u958b\u767a\u306e\u30cb\u30fc\u30ba\u306b\u5fdc\u3048\u308b\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
Ruby on Rails\u306f\u3001\u305d\u306e\u300cConvention over Configuration\uff08CoC\uff09\u300d\u306e\u539f\u5247\u3068\u8c4a\u5bcc\u306a\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u306b\u3088\u308a\u3001\u9ad8\u901f\u306a\u958b\u767a\u3092\u53ef\u80fd\u306b\u3059\u308b\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3068\u3057\u3066\u77e5\u3089\u308c\u3066\u3044\u307e\u3059\u3002
\u4e00\u65b9\u3001GraphQL\u306f\u67d4\u8edf\u306a\u30c7\u30fc\u30bf\u53d6\u5f97\u3068\u578b\u5b89\u5168\u6027\u3092\u63d0\u4f9b\u3059\u308bAPI\u30af\u30a8\u30ea\u8a00\u8a9e\u3067\u3059\u3002
\u3053\u306e2\u3064\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
GraphQL\u3092Ruby on Rails\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u958b\u767a\u52b9\u7387\u3068\u67d4\u8edf\u6027\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u5b9f\u969b\u306b\u3001GitHub\u3001Shopify\u3001Airbnb\u306a\u3069\u306e\u5927\u898f\u6a21\u30b5\u30fc\u30d3\u30b9\u3067\u3082\u3001Ruby on Rails\u3068GraphQL\u306e\u7d44\u307f\u5408\u308f\u305b\u304c\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002
\u3053\u308c\u3089\u306e\u6210\u529f\u4e8b\u4f8b\u306f\u3001\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u304c\u5358\u306a\u308b\u30c8\u30ec\u30f3\u30c9\u3067\u306f\u306a\u304f\u3001\u5b9f\u7528\u7684\u3067\u52b9\u679c\u7684\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3067\u3042\u308b\u3053\u3068\u3092\u8a3c\u660e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
Ruby on Rails\u3068GraphQL\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u30e2\u30c0\u30f3\u306aWeb\u958b\u767a\u306e\u30cb\u30fc\u30ba\u306b\u5fdc\u3048\u308b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u30bb\u30c3\u30c8\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002
\u9ad8\u3044\u751f\u7523\u6027\u3001\u67d4\u8edf\u306a\u30c7\u30fc\u30bf\u53d6\u5f97\u3001\u305d\u3057\u3066\u512a\u308c\u305f\u958b\u767a\u8005\u4f53\u9a13\u3092\u6c42\u3081\u308b\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u3068\u3063\u3066\u3001\u3053\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u9b45\u529b\u7684\u306a\u9078\u629e\u80a2\u3068\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
\u672c\u8a18\u4e8b\u3067\u306f\u3001Ruby on Rails\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306bGraphQL\u3092\u5c0e\u5165\u3059\u308b\u65b9\u6cd5\u3001\u57fa\u672c\u7684\u306a\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3001\u305d\u3057\u3066\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u6d3b\u7528\u4e8b\u4f8b\u307e\u3067\u3001\u5e45\u5e83\u304f\u30ab\u30d0\u30fc\u3057\u3066\u3044\u304d\u307e\u3059\u3002
Ruby on Rails\u3068GraphQL\u306e\u529b\u3092\u6700\u5927\u9650\u306b\u5f15\u304d\u51fa\u3057\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u67d4\u8edf\u306aWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306e\u77e5\u8b58\u3068\u30c6\u30af\u30cb\u30c3\u30af\u3092\u3001\u4e00\u7dd2\u306b\u5b66\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
GraphQL\u306f\u3001\u67d4\u8edf\u3067\u30d1\u30ef\u30d5\u30eb\u306aAPI\u30af\u30a8\u30ea\u8a00\u8a9e\u3067\u3059\u3002
Ruby on Rails\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u3067\u62e1\u5f35\u6027\u306e\u9ad8\u3044API\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002
\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001GraphQL\u306e\u57fa\u672c\u6982\u5ff5\u3068\u3001Ruby on Rails\u3067\u306e\u5b9f\u88c5\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
GraphQL\u306e\u4e2d\u5fc3\u3068\u306a\u308b\u306e\u306f\u3001\u30b9\u30ad\u30fc\u30de\u3067\u3059\u3002
\u30b9\u30ad\u30fc\u30de\u306f\u3001API\u3067\u5229\u7528\u53ef\u80fd\u306a\u30c7\u30fc\u30bf\u578b\u3068\u305d\u306e\u95a2\u4fc2\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002
Ruby on Rails\u3067GraphQL\u3092\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001\u307e\u305a\u5fc5\u8981\u306agem\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
# Gemfile\ngem 'graphql'<\/pre>\n\n\n\n\u6b21\u306b\u3001GraphQL\u30b9\u30ad\u30fc\u30de\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002
\u4ee5\u4e0b\u306f\u3001\u7c21\u5358\u306a\u30d6\u30ed\u30b0\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30b9\u30ad\u30fc\u30de\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n# app\/graphql\/types\/query_type.rb\nmodule Types\n class QueryType < Types::BaseObject\n field :posts, [Types::PostType], null: false\n\n def posts\n Post.all\n end\n end\nend\n\n# app\/graphql\/types\/post_type.rb\nmodule Types\n class PostType < Types::BaseObject\n field :id, ID, null: false\n field :title, String, null: false\n field :content, String, null: false\n field :author, Types::UserType, null: false\n end\nend\n\n# app\/graphql\/types\/user_type.rb\nmodule Types\n class UserType < Types::BaseObject\n field :id, ID, null: false\n field :name, String, null: false\n field :email, String, null: false\n end\nend<\/pre>\n\n\n\n\u3053\u306e\u30b9\u30ad\u30fc\u30de\u3067\u306f\u3001
Post<\/code>\u3068User<\/code>\u306e2\u3064\u306e\u578b\u3092\u5b9a\u7fa9\u3057\u3001\u305d\u308c\u3089\u306e\u95a2\u4fc2\u3092\u8868\u73fe\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n\u30af\u30a8\u30ea\u3068\u30df\u30e5\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u88c5\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n
GraphQL\u3067\u306f\u3001\u30c7\u30fc\u30bf\u306e\u53d6\u5f97\u306b\u300c\u30af\u30a8\u30ea\u300d\u3001\u30c7\u30fc\u30bf\u306e\u5909\u66f4\u306b\u300c\u30df\u30e5\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u300d\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
<\/i><\/span>\u30af\u30a8\u30ea\u306e\u4f8b<\/div><\/div>\n# app\/graphql\/types\/query_type.rb\nmodule Types\n class QueryType < Types::BaseObject\n field :post, Types::PostType, null: true do\n argument :id, ID, required: true\n end\n\n def post(id:)\n Post.find(id)\n end\n end\nend<\/pre>\n<\/div><\/div><\/div>\n\n\n\n<\/i><\/span>\u30df\u30e5\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u4f8b<\/div><\/div>\n# app\/graphql\/mutations\/create_post.rb\nmodule Mutations\n class CreatePost < BaseMutation\n argument :title, String, required: true\n argument :content, String, required: true\n\n field :post, Types::PostType, null: true\n field :errors, [String], null: false\n\n def resolve(title:, content:)\n post = Post.new(title: title, content: content)\n if post.save\n {\n post: post,\n errors: []\n }\n else\n {\n post: nil,\n errors: post.errors.full_messages\n }\n end\n end\n end\nend<\/pre>\n<\/div><\/div><\/div>\n\n\n\n\u3053\u308c\u3089\u306e\u5b9f\u88c5\u306b\u3088\u308a\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u5fc5\u8981\u306a\u30c7\u30fc\u30bf\u306e\u307f\u3092\u67d4\u8edf\u306b\u53d6\u5f97\u3057\u305f\u308a\u3001\u65b0\u3057\u3044\u30c7\u30fc\u30bf\u3092\u4f5c\u6210\u3057\u305f\u308a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
Resolver\u306e\u52b9\u7387\u7684\u306a\u66f8\u304d\u65b9<\/h3>\n\n\n\n
Resolver\u306f\u3001GraphQL\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u3069\u306e\u3088\u3046\u306b\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u304b\u3092\u5b9a\u7fa9\u3059\u308b\u95a2\u6570\u3067\u3059\u3002
\u52b9\u7387\u7684\u306aResolver\u3092\u66f8\u304f\u3053\u3068\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n\u4ee5\u4e0b\u306f\u3001N+1\u554f\u984c\u3092\u56de\u907f\u3059\u308bResolver\u306e\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n
# app\/graphql\/types\/query_type.rb\nmodule Types\n class QueryType < Types::BaseObject\n field :posts, [Types::PostType], null: false\n\n def posts\n Post.includes(:author).all\n end\n end\nend\n\n# app\/graphql\/types\/post_type.rb\nmodule Types\n class PostType < Types::BaseObject\n # ... \u4ed6\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u5b9a\u7fa9\n\n field :author, Types::UserType, null: false\n\n def author\n object.author\n end\n end\nend<\/pre>\n\n\n\n\u3053\u306e\u4f8b\u3067\u306f\u3001
includes(:author)<\/code>\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u95a2\u9023\u3059\u308bauthor\u30c7\u30fc\u30bf\u3092\u4e8b\u524d\u306b\u30ed\u30fc\u30c9\u3057\u3001N+1\u554f\u984c\u3092\u9632\u3044\u3067\u3044\u307e\u3059\u3002<\/p>\n\n\n\n\u3055\u3089\u306b\u3001\u30d0\u30c3\u30c1\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u306b\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
# app\/graphql\/loaders\/association_loader.rb\nclass AssociationLoader < GraphQL::Batch::Loader\n def initialize(model, association_name)\n @model = model\n @association_name = association_name\n end\n\n def perform(record_ids)\n records = @model.where(id: record_ids).includes(@association_name)\n records.each { |record| fulfill(record.id, record) }\n record_ids.each { |id| fulfill(id, nil) unless fulfilled?(id) }\n end\nend\n\n# app\/graphql\/types\/post_type.rb\nmodule Types\n class PostType < Types::BaseObject\n # ... \u4ed6\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u5b9a\u7fa9\n\n field :author, Types::UserType, null: false\n\n def author\n AssociationLoader.for(Post, :author).load(object.id)\n end\n end\nend<\/pre>\n\n\n\n\u3053\u306e\u5b9f\u88c5\u306b\u3088\u308a\u3001\u8907\u6570\u306e\u6295\u7a3f\u306e\u8457\u8005\u3092\u52b9\u7387\u7684\u306b\u4e00\u62ec\u3067\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
GraphQL\u3068Ruby on Rails\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u67d4\u8edf\u3067\u52b9\u7387\u7684\u306aAPI\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002
\u30b9\u30ad\u30fc\u30de\u306e\u9069\u5207\u306a\u8a2d\u8a08\u3001\u52b9\u7387\u7684\u306aResolver\u306e\u5b9f\u88c5\u3001\u305d\u3057\u3066\u30d0\u30c3\u30c1\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u6d3b\u7528\u306b\u3088\u308a\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u4fdd\u5b88\u6027\u306e\u9ad8\u3044API\u3092\u5b9f\u73fe\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002
\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u308a\u8a73\u7d30\u306a\u74b0\u5883\u69cb\u7bc9\u30b9\u30c6\u30c3\u30d7\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\nRuby on Rails\u3067\u306eGraphQL\u74b0\u5883\u69cb\u7bc9\u30b9\u30c6\u30c3\u30d7<\/h2>\n\n\n\n
Ruby on Rails\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306bGraphQL\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u67d4\u8edf\u3067\u52b9\u7387\u7684\u306aAPI\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002
\u3053\u3053\u3067\u306f\u3001GraphQL\u74b0\u5883\u3092\u69cb\u7bc9\u3059\u308b\u305f\u3081\u306e\u5177\u4f53\u7684\u306a\u30b9\u30c6\u30c3\u30d7\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n\u5fc5\u8981\u306aGem\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3068\u8a2d\u5b9a<\/h3>\n\n\n\n
\u307e\u305a\u3001\u5fc5\u8981\u306aGem\u3092\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002
Gemfile\u306b\u4ee5\u4e0b\u306e\u884c\u3092\u8ffd\u52a0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n# Gemfile\ngem 'graphql'\ngem 'graphiql-rails', group: :development<\/pre>\n\n\n\n\u6b21\u306b\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066Gem\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
bundle install<\/pre>\n\n\n\nGraphQL\u306e\u57fa\u672c\u7684\u306a\u30d5\u30a1\u30a4\u30eb\u3092\u751f\u6210\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
rails generate graphql:install<\/pre>\n\n\n\n\u3053\u306e\u30b3\u30de\u30f3\u30c9\u306b\u3088\u308a\u3001\u4ee5\u4e0b\u306e\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\n
app\/graphql\/types\/query_type.rb<\/code><\/li>\n\n\n\napp\/graphql\/types\/mutation_type.rb<\/code><\/li>\n\n\n\napp\/graphql\/[your_app_name]_schema.rb<\/code><\/li>\n<\/ul>\n\n\n\n\u307e\u305f\u3001
config\/routes.rb<\/code>\u306b\u4ee5\u4e0b\u306e\u884c\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\npost \"\/graphql\", to: \"graphql#execute\"<\/pre>\n\n\n\nGraphQL\u578b\u306e\u5b9a\u7fa9\u3068\u30e2\u30c7\u30eb\u3068\u306e\u9023\u643a<\/h3>\n\n\n\n
GraphQL\u578b\u3092\u5b9a\u7fa9\u3059\u308b\u969b\u306f\u3001\u65e2\u5b58\u306eRails\u30e2\u30c7\u30eb\u3068\u9023\u643a\u3055\u305b\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002
\u4ee5\u4e0b\u306f\u3001User<\/code>\u30e2\u30c7\u30eb\u306b\u5bfe\u5fdc\u3059\u308bGraphQL\u578b\u306e\u4f8b\u3067\u3059\u3002<\/p>\n\n\n\n# app\/graphql\/types\/user_type.rb\nmodule Types\n class UserType < Types::BaseObject\n field :id, ID, null: false\n field :name, String, null: false\n field :email, String, null: false\n field :posts, [Types::PostType], null: true\n\n def posts\n object.posts.includes(:comments) # N+1\u554f\u984c\u3092\u56de\u907f\n end\n end\nend<\/pre>\n\n\n\n\u3053\u306e\u4f8b\u3067\u306f\u3001
User<\/code>\u30e2\u30c7\u30eb\u306e\u5c5e\u6027\u3092GraphQL\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u3057\u3066\u5b9a\u7fa9\u3057\u3001\u95a2\u9023\u3059\u308bposts<\/code>\u3082\u53d6\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002includes(:comments)<\/code>\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001N+1\u554f\u984c\u3092\u56de\u907f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n\u30e2\u30c7\u30eb\u9593\u306e\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u6271\u3046\u969b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b
resolve_type<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3068\u4fbf\u5229\u3067\u3059\u3002<\/p>\n\n\n\n# app\/graphql\/types\/post_type.rb\nmodule Types\n class PostType < Types::BaseObject\n field :id, ID, null: false\n field :title, String, null: false\n field :content, String, null: false\n field :author, Types::UserType, null: false\n\n def author\n Loaders::RecordLoader.for(User).load(object.author_id)\n end\n end\nend<\/pre>\n\n\n\n\u3053\u306e\u4f8b\u3067\u306f\u3001\u30d0\u30c3\u30c1\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u3066\u52b9\u7387\u7684\u306b\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
GraphiQL\u3092\u4f7f\u7528\u3057\u305fAPI\u30c6\u30b9\u30c8\u74b0\u5883\u306e\u6e96\u5099<\/h3>\n\n\n\n
GraphiQL\u306f\u3001GraphQL API\u3092\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u306b\u30c6\u30b9\u30c8\u3059\u308b\u305f\u3081\u306e\u30c4\u30fc\u30eb\u3067\u3059\u3002
\u958b\u767a\u74b0\u5883\u3067GraphiQL\u3092\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n
config\/routes.rb<\/code>\u306b\u4ee5\u4e0b\u306e\u884c\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n\n\n\nif Rails.env.development?\n mount GraphiQL::Rails::Engine, at: \"\/graphiql\", graphql_path: \"\/graphql\"\nend<\/pre>\n\n\n\n\u307e\u305f\u3001
app\/assets\/config\/manifest.js<\/code>\u306b\u4ee5\u4e0b\u306e\u884c\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n\/\/= link graphiql\/rails\/application.css\n\/\/= link graphiql\/rails\/application.js<\/pre>\n\n\n\n\u3053\u308c\u3067\u3001\u958b\u767a\u74b0\u5883\u3067
http:\/\/localhost:3000\/graphiql<\/code>\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u3001GraphiQL\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\nGraphiQL\u3092\u4f7f\u7528\u3057\u3066\u30af\u30a8\u30ea\u3092\u30c6\u30b9\u30c8\u3059\u308b\u4f8b<\/p>\n\n\n\n
query {\n user(id: 1) {\n name\n email\n posts {\n title\n content\n }\n }\n}<\/pre>\n\n\n\n\u3053\u306e\u30af\u30a8\u30ea\u306f\u3001ID 1\u306e\u30e6\u30fc\u30b6\u30fc\u306e\u540d\u524d\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3001\u304a\u3088\u3073\u95a2\u9023\u3059\u308b\u6295\u7a3f\u306e\u30bf\u30a4\u30c8\u30eb\u3068\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
<\/i><\/span>GraphiQL\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9<\/div><\/div>\n\n
- \u958b\u767a\u74b0\u5883\u3067\u306e\u307f\u6709\u52b9\u306b\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3001\u672c\u756a\u74b0\u5883\u3067\u306f\u7121\u52b9\u5316\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n
- \u5fc5\u8981\u306b\u5fdc\u3058\u3066\u8a8d\u8a3c\u3092\u8ffd\u52a0\u3057\u3001API\u306e\u5b89\u5168\u6027\u3092\u78ba\u4fdd\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n\n\n\n
- \u8907\u96d1\u306a\u30af\u30a8\u30ea\u3084\u30df\u30e5\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u30c6\u30b9\u30c8\u3059\u308b\u969b\u306f\u3001GraphiQL\u306e\u5909\u6570\u6a5f\u80fd\u3092\u6d3b\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n
\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n
1. CORS (Cross-Origin Resource Sharing) \u306e\u8a2d\u5b9a<\/h4>\n\n\n\n
\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u3068\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u304c\u7570\u306a\u308b\u30c9\u30e1\u30a4\u30f3\u306b\u3042\u308b\u5834\u5408\u3001CORS\u8a2d\u5b9a\u304c\u5fc5\u8981\u3067\u3059\u3002
rack-cors<\/code> gem\u3092\u4f7f\u7528\u3057\u3066\u8a2d\u5b9a\u3067\u304d\u307e\u3059<\/p>\n\n\n\n# config\/initializers\/cors.rb\n Rails.application.config.middleware.insert_before 0, Rack::Cors do\n allow do\n origins 'http:\/\/your-frontend-domain.com'\n resource '\/graphql', headers: :any, methods: [:post, :options]\n end\n end<\/pre>\n\n\n\n2. \u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u4e92\u63db\u6027<\/h4>\n\n\n\n
GraphQL\u95a2\u9023\u306egem\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u4e92\u3044\u306b\u4e92\u63db\u6027\u304c\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002
\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306f\u3001\u5404gem\u306e\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u53c2\u7167\u3057\u3001\u9069\u5207\u306a\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n3. \u30c7\u30d0\u30c3\u30b0\u65b9\u6cd5<\/h4>\n\n\n\n
GraphQL\u30af\u30a8\u30ea\u306e\u30c7\u30d0\u30c3\u30b0\u306b\u306f\u3001
GraphQL::Query::Tracer<\/code>\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059<\/p>\n\n\n\nclass QueryTracer\n def trace(key, data)\n p \"Key: #{key}, Data: #{data}\"\n yield\n end\n end\n\n # config\/application.rb\n config.graphql.tracer = QueryTracer.new<\/pre>\n\n\n\n4. N+1\u554f\u984c\u306e\u56de\u907f<\/h4>\n\n\n\n
GraphQL\u3067\u306f\u3001N+1\u554f\u984c\u304c\u767a\u751f\u3057\u3084\u3059\u3044\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u65b9\u6cd5\u3067\u56de\u907f\u3057\u307e\u3057\u3087\u3046<\/p>\n\n\n\n
\n
includes<\/code>\u3084preload<\/code>\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n- \u30d0\u30c3\u30c1\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u5b9f\u88c5\u3059\u308b\uff08\u4f8b\uff1a
graphql-batch<\/code> gem\u3092\u4f7f\u7528\uff09<\/li>\n<\/ul>\n\n\n\n5. \u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u306e\u6d3b\u7528<\/h4>\n\n\n\n
\u5171\u901a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u30bb\u30c3\u30c8\u3092\u518d\u5229\u7528\u3059\u308b\u969b\u306f\u3001\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3068\u52b9\u7387\u7684\u3067\u3059\u3002<\/p>\n\n\n\n
fragment UserFields on User {\n id\n name\n email\n }\n\n query {\n user(id: 1) {\n ...UserFields\n posts {\n title\n }\n }\n }<\/pre>\n\n\n\n\u767a\u5c55\u7684\u306a\u8a2d\u5b9a<\/h3>\n\n\n\n
1. \u30d0\u30c3\u30c1\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0<\/h4>\n\n\n\n
graphql-batch<\/code> gem\u3092\u4f7f\u7528\u3057\u3066\u3001\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u53d6\u5f97\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\ngem 'graphql-batch'\n\n # app\/graphql\/loaders\/record_loader.rb\n class RecordLoader < GraphQL::Batch::Loader\n def initialize(model)\n @model = model\n end\n\n def perform(ids)\n @model.where(id: ids).each { |record| fulfill(record.id, record) }\n ids.each { |id| fulfill(id, nil) unless fulfilled?(id) }\n end\n end<\/pre>\n\n\n\n2. \u8a8d\u8a3c\u30fb\u8a8d\u53ef\u306e\u5b9f\u88c5<\/h4>\n\n\n\n
GraphQL\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3001\u8a8d\u8a3c\u30fb\u8a8d\u53ef\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
# app\/controllers\/graphql_controller.rb\n def execute\n context = {\n current_user: current_user,\n # \u305d\u306e\u4ed6\u306e\u8a8d\u8a3c\u60c5\u5831\n }\n result = YourAppSchema.execute(params[:query], context: context, variables: params[:variables])\n render json: result\n end\n\n # app\/graphql\/types\/query_type.rb\n field :protected_data, String, null: false\n\n def protected_data\n if context[:current_user].nil?\n raise GraphQL::ExecutionError, \"\u8a8d\u8a3c\u304c\u5fc5\u8981\u3067\u3059\"\n end\n \"\u4fdd\u8b77\u3055\u308c\u305f\u30c7\u30fc\u30bf\"\n end<\/pre>\n\n\n\n3. \u30ab\u30b9\u30bf\u30e0\u30c7\u30a3\u30ec\u30af\u30c6\u30a3\u30d6\u306e\u4f5c\u6210<\/h4>\n\n\n\n
\u7279\u5b9a\u306e\u6761\u4ef6\u4e0b\u3067\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u89e3\u6c7a\u3092\u30b9\u30ad\u30c3\u30d7\u3059\u308b\u306a\u3069\u3001\u30ab\u30b9\u30bf\u30e0\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
class SkipDirective < GraphQL::Schema::Directive\n description \"\u6307\u5b9a\u3055\u308c\u305f\u6761\u4ef6\u304c\u771f\u306e\u5834\u5408\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u89e3\u6c7a\u3092\u30b9\u30ad\u30c3\u30d7\u3057\u307e\u3059\"\n argument :if, Boolean, required: true\n\n def self.resolve(object, arguments, context)\n yield unless arguments[:if]\n end\n end\n\n # \u30b9\u30ad\u30fc\u30de\u306b\u8ffd\u52a0\n class YourAppSchema < GraphQL::Schema\n directive(SkipDirective)\n end<\/pre>\n\n\n\nRuby on Rails\u3067\u306eGraphQL\u74b0\u5883\u69cb\u7bc9\u306f\u3001\u521d\u671f\u8a2d\u5b9a\u304b\u3089\u767a\u5c55\u7684\u306a\u6a5f\u80fd\u307e\u3067\u3001\u6bb5\u968e\u7684\u306b\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002
\u57fa\u672c\u7684\u306a\u8a2d\u5b9a\u3092\u78ba\u5b9f\u306b\u884c\u3044\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u6a5f\u80fd\u3092\u62e1\u5f35\u3057\u3066\u3044\u304f\u3053\u3068\u3067\u3001\u67d4\u8edf\u3067\u52b9\u7387\u7684\u306aGraphQL API\u3092\u69cb\u7bc9\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002
\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3088\u308a\u5177\u4f53\u7684\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u6df1\u6398\u308a\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n
GraphQL\u3092\u4f7f\u7528\u3057\u305fRuby on Rails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u304c\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002
\u9069\u5207\u306a\u6700\u9069\u5316\u306b\u3088\u308a\u3001\u5fdc\u7b54\u6642\u9593\u306e\u77ed\u7e2e\u3001\u30b5\u30fc\u30d0\u30fc\u30ea\u30bd\u30fc\u30b9\u306e\u52b9\u7387\u7684\u306a\u4f7f\u7528\u3001\u30e6\u30fc\u30b6\u30fc\u30a8\u30af\u30b9\u30da\u30ea\u30a8\u30f3\u30b9\u306e\u5411\u4e0a\u3001\u305d\u3057\u3066\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u306e\u78ba\u4fdd\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002
\u3053\u3053\u3067\u306f\u3001\u4e3b\u8981\u306a3\u3064\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\nN+1\u554f\u984c\u306e\u89e3\u6c7a\u7b56\u3068\u5b9f\u88c5\u4f8b<\/h3>\n\n\n\n
N+1\u554f\u984c\u306f\u3001GraphQL\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u6027\u80fd\u554f\u984c\u3067\u3059\u3002
\u3053\u308c\u306f\u30011\u56de\u306e\u30af\u30a8\u30ea\u3067\u53d6\u5f97\u3057\u305f\u30c7\u30fc\u30bf\u306b\u5bfe\u3057\u3066\u3001\u95a2\u9023\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u8907\u6570\u306e\u8ffd\u52a0\u30af\u30a8\u30ea\u304c\u767a\u751f\u3059\u308b\u554f\u984c\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n\n\n\n\u89e3\u6c7a\u7b561: Eager Loading<\/h4>\n\n\n\n
ActiveRecord\u306e
includes<\/code>\u3001preload<\/code>\u3001eager_load<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u95a2\u9023\u30c7\u30fc\u30bf\u3092\u4e8b\u524d\u306b\u8aad\u307f\u8fbc\u307f\u3001N+1\u554f\u984c\u3092\u89e3\u6c7a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n# app\/graphql\/types\/query_type.rb\nfield :posts, [Types::PostType], null: false\n\ndef posts\n Post.includes(:author, :comments).all\nend<\/pre>\n\n\n\n\u3053\u306e\u65b9\u6cd5\u306b\u3088\u308a\u3001\u6295\u7a3f\u3068\u305d\u306e\u8457\u8005\u3001\u30b3\u30e1\u30f3\u30c8\u30921\u3064\u306e\u30af\u30a8\u30ea\u3067\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u89e3\u6c7a\u7b562: GraphQL::Batch\u306e\u4f7f\u7528<\/h4>\n\n\n\n
graphql-batch<\/code> gem\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u3088\u308a\u67d4\u8edf\u306a\u30d0\u30c3\u30c1\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n# app\/graphql\/loaders\/association_loader.rb\nclass AssociationLoader < GraphQL::Batch::Loader\n def initialize(model, association_name)\n @model = model\n @association_name = association_name\n end\n\n def perform(record_ids)\n records = @model.where(id: record_ids).includes(@association_name)\n records.each { |record| fulfill(record.id, record.public_send(@association_name)) }\n record_ids.each { |id| fulfill(id, nil) unless fulfilled?(id) }\n end\nend\n\n# app\/graphql\/types\/post_type.rb\nfield :author, Types::UserType, null: false\n\ndef author\n AssociationLoader.for(Post, :author).load(object.id)\nend<\/pre>\n\n\n\n\u3053\u306e\u5b9f\u88c5\u306b\u3088\u308a\u3001\u8907\u6570\u306e\u6295\u7a3f\u306e\u8457\u8005\u3092\u52b9\u7387\u7684\u306b\u4e00\u62ec\u3067\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
N+1\u554f\u984c\u306e\u89e3\u6c7a\u306b\u3088\u308a\u3001\u30af\u30a8\u30ea\u6642\u9593\u3092\u6700\u592790%\u524a\u6e1b\u3067\u304d\u308b\u3053\u3068\u304c\u5831\u544a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u30d0\u30c3\u30c1\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u6d3b\u7528\u3057\u305f\u30af\u30a8\u30ea\u306e\u52b9\u7387\u5316<\/h3>\n\n\n\n
\u30d0\u30c3\u30c1\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u306f\u3001\u8907\u6570\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u4e00\u5ea6\u306b\u52b9\u7387\u7684\u306b\u53d6\u5f97\u3059\u308b\u6280\u8853\u3067\u3059\u3002
graphql-batch<\/code> gem\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30ab\u30b9\u30bf\u30e0\u30ed\u30fc\u30c0\u30fc\u3092\u4f5c\u6210\u3057\u3066\u8907\u96d1\u306a\u30d0\u30c3\u30c1\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n# app\/graphql\/loaders\/record_loader.rb\nclass RecordLoader < GraphQL::Batch::Loader\n def initialize(model)\n @model = model\n end\n\n def perform(ids)\n @model.where(id: ids).each { |record| fulfill(record.id, record) }\n ids.each { |id| fulfill(id, nil) unless fulfilled?(id) }\n end\nend\n\n# app\/graphql\/types\/comment_type.rb\nfield :user, Types::UserType, null: false\n\ndef user\n RecordLoader.for(User).load(object.user_id)\nend<\/pre>\n\n\n\n\u3053\u306e\u5b9f\u88c5\u306b\u3088\u308a\u3001\u8907\u6570\u306e\u30b3\u30e1\u30f3\u30c8\u306e\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u30921\u56de\u306e\u30af\u30a8\u30ea\u3067\u52b9\u7387\u7684\u306b\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u30d0\u30c3\u30c1\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u5229\u70b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n
\n
- \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30af\u30a8\u30ea\u306e\u524a\u6e1b<\/li>\n\n\n\n
- \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316<\/li>\n\n\n\n
- \u5fdc\u7b54\u6642\u9593\u306e\u77ed\u7e2e<\/li>\n<\/ol>\n\n\n\n
\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u30d0\u30c3\u30c1\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u8907\u6570\u30ec\u30b3\u30fc\u30c9\u53d6\u5f97\u6642\u306b50-80%\u306e\u6027\u80fd\u5411\u4e0a\u304c\u5831\u544a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565\u3068\u305d\u306e\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n
\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3001\u983b\u7e41\u306b\u30a2\u30af\u30bb\u30b9\u3055\u308c\u308b\u30c7\u30fc\u30bf\u3092\u9ad8\u901f\u306a\u30b9\u30c8\u30ec\u30fc\u30b8\u306b\u4fdd\u5b58\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002
GraphQL\u3067\u306f\u3001\u4ee5\u4e0b\u306e3\u3064\u306e\u30ec\u30d9\u30eb\u3067\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\nGraphQL\u306e\u30ec\u30d9\u30eb\u52253\u3064\u306e\u30ad\u30e3\u30c3\u30b7\u30e5<\/div>\n\n
- \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ad\u30e3\u30c3\u30b7\u30e5<\/li>\n\n\n\n
- \u30af\u30a8\u30ea\u30ad\u30e3\u30c3\u30b7\u30e5<\/li>\n\n\n\n
- \u30d5\u30a3\u30fc\u30eb\u30c9\u30ec\u30d9\u30eb\u30ad\u30e3\u30c3\u30b7\u30e5<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n\n
\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ad\u30e3\u30c3\u30b7\u30e5<\/h4>\n\n\n\n
Rails.cache\u3092\u4f7f\u7528\u3057\u3066\u3001\u500b\u3005\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
# app\/graphql\/types\/user_type.rb\nfield :posts, [Types::PostType], null: false\n\ndef posts\n Rails.cache.fetch([\"user\", object.id, \"posts\"], expires_in: 1.hour) do\n object.posts.to_a\n end\nend<\/pre>\n\n\n\n\u3053\u306e\u65b9\u6cd5\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u6295\u7a3f\u30921\u6642\u9593\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u30af\u30a8\u30ea\u30ad\u30e3\u30c3\u30b7\u30e5<\/h4>\n\n\n\n
graphql-ruby-cache<\/code> gem\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30af\u30a8\u30ea\u5168\u4f53\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n# config\/initializers\/graphql_cache.rb\nGraphQL::Cache.configure do |c|\n c.namespace = \"graphql:#{Rails.env}\"\n c.expires_in = 1.hour\n c.cache = Rails.cache\nend\n\n# app\/graphql\/types\/query_type.rb\nfield :popular_posts, [Types::PostType], null: false\n\ndef popular_posts\n GraphQL::Cache.fetch(:popular_posts) do\n Post.popular.limit(10).to_a\n end\nend<\/pre>\n\n\n\n\u3053\u306e\u5b9f\u88c5\u306b\u3088\u308a\u3001\u4eba\u6c17\u306e\u6295\u7a3f\u4e00\u89a7\u30921\u6642\u9593\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3001\u983b\u7e41\u306b\u5b9f\u884c\u3055\u308c\u308b\u30af\u30a8\u30ea\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u30d5\u30a3\u30fc\u30eb\u30c9\u30ec\u30d9\u30eb\u30ad\u30e3\u30c3\u30b7\u30e5<\/h4>\n\n\n\n
\u500b\u3005\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u7d30\u304b\u3044\u7c92\u5ea6\u3067\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u5236\u5fa1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
# app\/graphql\/types\/post_type.rb\nfield :comment_count, Integer, null: false\n\ndef comment_count\n Rails.cache.fetch([\"post\", object.id, \"comment_count\"], expires_in: 5.minutes) do\n object.comments.count\n end\nend<\/pre>\n\n\n\n\u3053\u306e\u65b9\u6cd5\u306b\u3088\u308a\u3001\u6295\u7a3f\u306e\u30b3\u30e1\u30f3\u30c8\u6570\u30925\u5206\u9593\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3001\u983b\u7e41\u306b\u5909\u66f4\u3055\u308c\u306a\u3044\u30c7\u30fc\u30bf\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n
<\/i><\/span>\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565\u306e\u6ce8\u610f\u70b9<\/div><\/div>\n\n
- \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6709\u52b9\u671f\u9650\u3092\u9069\u5207\u306b\u8a2d\u5b9a\u3059\u308b<\/li>\n\n\n\n
- \u30c7\u30fc\u30bf\u66f4\u65b0\u6642\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u9069\u5207\u306b\u7121\u52b9\u5316\u3059\u308b<\/li>\n\n\n\n
- \u30ad\u30e3\u30c3\u30b7\u30e5\u30d2\u30c3\u30c8\u7387\u3092\u76e3\u8996\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u6226\u7565\u3092\u8abf\u6574\u3059\u308b<\/li>\n<\/ol>\n<\/div><\/div><\/div>\n\n\n\n
\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5c0e\u5165\u306b\u3088\u308a\u3001\u7e70\u308a\u8fd4\u3057\u30af\u30a8\u30ea\u306e\u5fdc\u7b54\u6642\u9593\u3092\u6700\u592795%\u77ed\u7e2e\u3067\u304d\u308b\u3053\u3068\u304c\u5831\u544a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u307e\u3068\u3081<\/h3>\n\n\n\n
\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306f\u3001GraphQL\u3092\u4f7f\u7528\u3057\u305fRuby on Rails\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u6210\u529f\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002