2つのRails APIのGraphQLをapollo-federationで統合する方法がわからない。

実現したいこと

auth-apiには　Userが存在する
business-apiには
Busienss,
UserBusinessRelationが存在する。

Ruby
1class < UserBusinessRelation
2 user_id
3 business_id
4end

currentUserにbusinessesを含めたレスポンスを返したい。

発生している問題・分からないこと

ruby
1auth-api/app/graphql/types/user_type.rb
2module Types
3  class UserType < Types::BaseObject
4    field :id, ID, null: false
5    field :allow_password_change, Boolean, null: false
6    field :confirmation_sent_at, GraphQL::Types::ISO8601DateTime, null: true
7    field :confirmed_at, GraphQL::Types::ISO8601DateTime, null: true
8    field :email, String, null: false
9    field :name, String, null: true
10    field :nickname, String, null: true
11    field :provider, String, null: false
12    field :created_at, GraphQL::Types::ISO8601DateTime, null: false
13    field :updated_at, GraphQL::Types::ISO8601DateTime, null: false
14    field :role, Types::RoleType, null: false
15#businessesを追加したい
16    field :businesses, [Types::BusinessType], null: true
17
18  end
19end
20

該当のソースコード

js
1const { ApolloServer } = require('apollo-server');
2const { ApolloGateway, IntrospectAndCompose, RemoteGraphQLDataSource } = require('@apollo/gateway');
3
4class AuthenticatedDataSource extends RemoteGraphQLDataSource {
5  willSendRequest({ request, context }) {
6    request.http.headers.set('access-token', context["access-token"] || '');
7    request.http.headers.set('client', context.client || '');
8    request.http.headers.set('uid', context.uid || '');
9  }
10}
11
12const gateway = new ApolloGateway({
13  supergraphSdl: new IntrospectAndCompose({
14    subgraphs: [
15      { name: 'auth', url: 'http://localhost:3001/graphql' },
16      { name: 'business_manage', url: 'http://localhost:3002/graphql' },
17    ],
18  }),
19  debug: false,
20  buildService({ name, url }) {
21    return new AuthenticatedDataSource({ url });
22  },
23});
24
25const server = new ApolloServer({
26  gateway,
27  subscriptions: false,
28  context: ({ req }) => {
29    const accessToken = req.headers['access-token'] || '';
30    const client = req.headers['client'] || '';
31    const uid = req.headers['uid'] || '';
32    return { "access-token": accessToken, client, uid };
33  },
34});
35
36server.listen().then(({ url }) => {
37  console.log(`🚀 Gateway started at ${url}`);
38});
39

ruby
1auth-api/app/graphql/types/user_type.rb
2module Types
3  class UserType < Types::BaseObject
4    field :id, ID, null: false
5    field :allow_password_change, Boolean, null: false
6    field :confirmation_sent_at, GraphQL::Types::ISO8601DateTime, null: true
7    field :confirmed_at, GraphQL::Types::ISO8601DateTime, null: true
8    field :email, String, null: false
9    field :name, String, null: true
10    field :nickname, String, null: true
11    field :provider, String, null: false
12    field :created_at, GraphQL::Types::ISO8601DateTime, null: false
13    field :updated_at, GraphQL::Types::ISO8601DateTime, null: false
14    field :role, Types::RoleType, null: false
15    field :businesses, [Types::BusinessType], null: true
16  end
17
18  def self.resolve_reference(reference, _context)
19    User.find(reference[:id])
20  end
21
22  def businesses
23    #どうすれば外部のbusinessesを取得できるか
24    []
25  end
26end
27
28
29
30
31auth-api/app/graphql/types/user_business_relation_type.rb
32module Types
33  class UserBusinessRelationType < Types::BaseObject
34    key fields: 'id'
35    extend_type
36
37    field :id, ID, null: false, external: true
38    field :business_id, Integer, null: false
39    field :user_id, Integer, null: false
40
41    def user
42      User.find(user_id)
43    end
44
45    def business
46      { __typename: Types::BusinessType, id: object[:business_id] }
47    end
48  end
49end
50
51
52auth-api/app/graphql/types/business_type.rb
53module Types
54  class BusinessType < Types::BaseObject
55    key fields: 'id'
56    extend_type
57
58    field :id, ID, null: false, external: true
59    field :address, String, null: false
60    field :building, String, null: false
61    field :city, String, null: false
62    field :name, String, null: false
63    field :phone_number, String, null: false
64    field :postal_code, String, null: false
65    field :prefecture, String, null: false
66    field :stripe_customer_id, String, null: true
67    field :created_at, GraphQL::Types::ISO8601DateTime, null: false
68    field :updated_at, GraphQL::Types::ISO8601DateTime, null: false
69  end
70end

ruby
1business-manage-api/app/graphql/types/business_type.rb
2# business-api の BusinessType
3module Types
4  class BusinessType < Types::BaseObject
5    key fields: 'id'
6
7    field :id, ID, null: false
8    field :address, String, null: false
9    field :building, String, null: false
10    field :city, String, null: false
11    field :name, String, null: false
12    field :phone_number, String, null: false
13    field :postal_code, String, null: false
14    field :prefecture, String, null: false
15    field :stripe_customer_id, String, null: true
16    field :created_at, GraphQL::Types::ISO8601DateTime, null: false
17    field :updated_at, GraphQL::Types::ISO8601DateTime, null: false
18  end
19end
20
21
22
23business-manage-api/app/graphql/types/user_business_relation_type.rb
24module Types
25  class UserBusinessRelationType < Types::BaseObject
26    key fields: 'id'
27    field :id, ID, null: false
28    field :business_id, Integer, null: false
29    field :user_id, Integer, null: false
30
31    def user
32      { __typename: Types::UserType, id: object[:user_id]}
33    end
34
35    def business
36      Business.find(business_id)
37    end
38  end
39end
40
41
42
43/Users/masatakakitano/Desktop/cloud-ver2/business-manage-api/app/graphql/types/user_type.rb
44module Types
45  class UserType < Types::BaseObject
46    key fields: 'id'
47    extend_type
48
49    field :id, ID, null: false, external: true
50    field :businesses, [Types::BusinessType], null: true
51
52    def businesses
53      UserBusinessRelation.where(user_id: object[:id]).map do |relation|
54        Business.find(relation.business_id)
55      end
56    end
57  end
58end