active_model_serializers/test/adapter/json_api/linked_test.rb

require 'test_helper'

NestedPost = Class.new(Model)
class NestedPostSerializer < ActiveModel::Serializer
  has_many :nested_posts
end

module ActiveModelSerializers
  module Adapter
    class JsonApi
      class LinkedTest < ActiveSupport::TestCase
        def setup
          @author1 = Author.new(id: 1, name: 'Steve K.')
          @author2 = Author.new(id: 2, name: 'Tenderlove')
          @bio1 = Bio.new(id: 1, content: 'AMS Contributor')
          @bio2 = Bio.new(id: 2, content: 'Rails Contributor')
          @first_post = Post.new(id: 10, title: 'Hello!!', body: 'Hello, world!!')
          @second_post = Post.new(id: 20, title: 'New Post', body: 'Body')
          @third_post = Post.new(id: 30, title: 'Yet Another Post', body: 'Body')
          @blog = Blog.new(name: 'AMS Blog')
          @first_comment = Comment.new(id: 1, body: 'ZOMG A COMMENT')
          @second_comment = Comment.new(id: 2, body: 'ZOMG ANOTHER COMMENT')
          @first_post.blog = @blog
          @second_post.blog = @blog
          @third_post.blog = nil
          @first_post.comments = [@first_comment, @second_comment]
          @second_post.comments = []
          @third_post.comments = []
          @first_post.author = @author1
          @second_post.author = @author2
          @third_post.author = @author1
          @first_comment.post = @first_post
          @first_comment.author = nil
          @second_comment.post = @first_post
          @second_comment.author = nil
          @author1.posts = [@first_post, @third_post]
          @author1.bio = @bio1
          @author1.roles = []
          @author2.posts = [@second_post]
          @author2.bio = @bio2
          @author2.roles = []
          @bio1.author = @author1
          @bio2.author = @author2
        end

        def test_include_multiple_posts_and_linked_array
          serializer = ActiveModel::Serializer::CollectionSerializer.new([@first_post, @second_post])
          adapter = ActiveModelSerializers::Adapter::JsonApi.new(
            serializer,
            include: [:comments, author: [:bio]]
          )
          alt_adapter = ActiveModelSerializers::Adapter::JsonApi.new(
            serializer,
            include: [:comments, author: [:bio]]
          )

          expected = {
            data: [
              {
                id: '10',
                type: 'posts',
                attributes: {
                  title: 'Hello!!',
                  body: 'Hello, world!!'
                },
                relationships: {
                  comments: { data: [{ type: 'comments', id: '1' }, { type: 'comments', id: '2' }] },
                  blog: { data: { type: 'blogs', id: '999' } },
                  author: { data: { type: 'authors', id: '1' } }
                }
              },
              {
                id: '20',
                type: 'posts',
                attributes: {
                  title: 'New Post',
                  body: 'Body'
                },
                relationships: {
                  comments: { data: [] },
                  blog: { data: { type: 'blogs', id: '999' } },
                  author: { data: { type: 'authors', id: '2' } }
                }
              }
            ],
            included: [
              {
                id: '1',
                type: 'comments',
                attributes: {
                  body: 'ZOMG A COMMENT'
                },
                relationships: {
                  post: { data: { type: 'posts', id: '10' } },
                  author: { data: nil }
                }
              }, {
                id: '2',
                type: 'comments',
                attributes: {
                  body: 'ZOMG ANOTHER COMMENT'
                },
                relationships: {
                  post: { data: { type: 'posts', id: '10' } },
                  author: { data: nil }
                }
              }, {
                id: '1',
                type: 'authors',
                attributes: {
                  name: 'Steve K.'
                },
                relationships: {
                  posts: { data: [{ type: 'posts', id: '10' }, { type: 'posts', id: '30' }] },
                  roles: { data: [] },
                  bio: { data: { type: 'bios', id: '1' } }
                }
              }, {
                id: '1',
                type: 'bios',
                attributes: {
                  content: 'AMS Contributor',
                  rating: nil
                },
                relationships: {
                  author: { data: { type: 'authors', id: '1' } }
                }
              }, {
                id: '2',
                type: 'authors',
                attributes: {
                  name: 'Tenderlove'
                },
                relationships: {
                  posts: { data: [{ type: 'posts', id: '20' }] },
                  roles: { data: [] },
                  bio: { data: { type: 'bios', id: '2' } }
                }
              }, {
                id: '2',
                type: 'bios',
                attributes: {
                  rating: nil,
                  content: 'Rails Contributor'
                },
                relationships: {
                  author: { data: { type: 'authors', id: '2' } }
                }
              }
            ]
          }
          assert_equal expected, adapter.serializable_hash
          assert_equal expected, alt_adapter.serializable_hash
        end

        def test_include_multiple_posts_and_linked
          serializer = BioSerializer.new @bio1
          adapter = ActiveModelSerializers::Adapter::JsonApi.new(
            serializer,
            include: [author: [:posts]]
          )
          alt_adapter = ActiveModelSerializers::Adapter::JsonApi.new(
            serializer,
            include: [author: [:posts]]
          )

          expected = [
            {
              id: '1',
              type: 'authors',
              attributes: {
                name: 'Steve K.'
              },
              relationships: {
                posts: { data: [{ type: 'posts', id: '10' }, { type: 'posts', id: '30' }] },
                roles: { data: [] },
                bio: { data: { type: 'bios', id: '1' } }
              }
            }, {
              id: '10',
              type: 'posts',
              attributes: {
                title: 'Hello!!',
                body: 'Hello, world!!'
              },
              relationships: {
                comments: { data: [{ type: 'comments', id: '1' }, { type: 'comments', id: '2' }] },
                blog: { data: { type: 'blogs', id: '999' } },
                author: { data: { type: 'authors', id: '1' } }
              }
            }, {
              id: '30',
              type: 'posts',
              attributes: {
                title: 'Yet Another Post',
                body: 'Body'
              },
              relationships: {
                comments: { data: [] },
                blog: { data: { type: 'blogs', id: '999' } },
                author: { data: { type: 'authors', id: '1' } }
              }
            }
          ]

          assert_equal expected, adapter.serializable_hash[:included]
          assert_equal expected, alt_adapter.serializable_hash[:included]
        end

        def test_underscore_model_namespace_for_linked_resource_type
          spammy_post = Post.new(id: 123)
          spammy_post.related = [Spam::UnrelatedLink.new(id: 456)]
          serializer = SpammyPostSerializer.new(spammy_post)
          adapter = ActiveModelSerializers::Adapter::JsonApi.new(serializer)
          relationships = adapter.serializable_hash[:data][:relationships]
          expected = {
            related: {
              data: [{
                type: 'spam-unrelated-links',
                id: '456'
              }]
            }
          }
          assert_equal expected, relationships
        end

        def test_multiple_references_to_same_resource
          serializer = ActiveModel::Serializer::CollectionSerializer.new([@first_comment, @second_comment])
          adapter = ActiveModelSerializers::Adapter::JsonApi.new(
            serializer,
            include: [:post]
          )

          expected = [
            {
              id: '10',
              type: 'posts',
              attributes: {
                title: 'Hello!!',
                body: 'Hello, world!!'
              },
              relationships: {
                comments: {
                  data: [{ type: 'comments', id: '1' }, { type: 'comments', id: '2' }]
                },
                blog: {
                  data: { type: 'blogs', id: '999' }
                },
                author: {
                  data: { type: 'authors', id: '1' }
                }
              }
            }
          ]

          assert_equal expected, adapter.serializable_hash[:included]
        end

        def test_nil_link_with_specified_serializer
          @first_post.author = nil
          serializer = PostPreviewSerializer.new(@first_post)
          adapter = ActiveModelSerializers::Adapter::JsonApi.new(
            serializer,
            include: [:author]
          )

          expected = {
            data: {
              id: '10',
              type: 'posts',
              attributes: {
                title: 'Hello!!',
                body: 'Hello, world!!'
              },
              relationships: {
                comments: { data: [{ type: 'comments', id: '1' }, { type: 'comments', id: '2' }] },
                author: { data: nil }
              }
            }
          }
          assert_equal expected, adapter.serializable_hash
        end
      end

      class NoDuplicatesTest < ActiveSupport::TestCase
        Post = Class.new(::Model)
        Author = Class.new(::Model)

        class PostSerializer < ActiveModel::Serializer
          type 'posts'
          belongs_to :author
        end

        class AuthorSerializer < ActiveModel::Serializer
          type 'authors'
          has_many :posts
        end

        def setup
          @author = Author.new(id: 1, posts: [], roles: [], bio: nil)
          @post1 = Post.new(id: 1, author: @author)
          @post2 = Post.new(id: 2, author: @author)
          @author.posts << @post1
          @author.posts << @post2

          @nestedpost1 = ::NestedPost.new(id: 1, nested_posts: [])
          @nestedpost2 = ::NestedPost.new(id: 2, nested_posts: [])
          @nestedpost1.nested_posts << @nestedpost1
          @nestedpost1.nested_posts << @nestedpost2
          @nestedpost2.nested_posts << @nestedpost1
          @nestedpost2.nested_posts << @nestedpost2
        end

        def test_no_duplicates
          hash = ActiveModelSerializers::SerializableResource.new(@post1, adapter: :json_api,
                                                                          include: '*.*')
                                                             .serializable_hash
          expected = [
            {
              type: 'authors', id: '1',
              relationships: {
                posts: {
                  data: [
                    { type: 'posts', id: '1' },
                    { type: 'posts', id: '2' }
                  ]
                }
              }
            },
            {
              type: 'posts', id: '2',
              relationships: {
                author: {
                  data: { type: 'authors', id: '1' }
                }
              }
            }
          ]
          assert_equal(expected, hash[:included])
        end

        def test_no_duplicates_collection
          hash = ActiveModelSerializers::SerializableResource.new(
            [@post1, @post2],
            adapter: :json_api,
            include: '*.*'
          ).serializable_hash
          expected = [
            {
              type: 'authors', id: '1',
              relationships: {
                posts: {
                  data: [
                    { type: 'posts', id: '1' },
                    { type: 'posts', id: '2' }
                  ]
                }
              }
            }
          ]
          assert_equal(expected, hash[:included])
        end

        def test_no_duplicates_global
          hash = ActiveModelSerializers::SerializableResource.new(
            @nestedpost1,
            adapter: :json_api,
            include: '*'
          ).serializable_hash
          expected = [
            type: 'nested-posts', id: '2',
            relationships: {
              "nested-posts": {
                data: [
                  { type: 'nested-posts', id: '1' },
                  { type: 'nested-posts', id: '2' }
                ]
              }
            }
          ]
          assert_equal(expected, hash[:included])
        end

        def test_no_duplicates_collection_global
          hash = ActiveModelSerializers::SerializableResource.new(
            [@nestedpost1, @nestedpost2],
            adapter: :json_api,
            include: '*'
          ).serializable_hash
          assert_nil(hash[:included])
        end
      end
    end
  end
end