活動模型序列化器has_many關聯

Question

我正在使用gem active_model_serializers 。

序列化器：

class ProjectGroupSerializer < ActiveModel::Serializer
  attributes :id, :name, :description
  has_many :projects
end

class ProjectSerializer < ActiveModel::Serializer
  attributes :id, :name, :description
  belongs_to :project_group
end

控制器：

def index
  @project_groups = ProjectGroup.all.includes(:projects)
  render json: @project_groups, include: 'projects'
end

我收到以下回應 ：

{
  "data": [
    {
      "id": "35",
      "type": "project_groups",
      "attributes": {
        "name": "sdsdf",
        "description": null
      },
      "relationships": {
        "projects": {
          "data": [
            {
              "id": "1",
              "type": "projects"
            },
            {
              "id": "2",
              "type": "projects"
            }
          ]
        }
      }
    }
  ],
  "included": [
    {
      "id": "1",
      "type": "projects",
      "attributes": {
        "name": "qweqwe",
        "description": null,
        "project_group_id": 1
      },
      "relationships": {
        "project_group": {
          "data": {
            "id": "1",
            "type": "project_groups"
          }
        }
      }
    },
    {
      "id": "2",
      "type": "projects",
      "attributes": {
        "name": "ewe",
        "description": null,
        "project_group_id": 2
      },
      "relationships": {
        "project_group": {
          "data": {
            "id": "2",
            "type": "project_groups"
          }
        }
      }
    }
  ]
}

我想檢索關系 對象內部的關聯 ，而不是像接收到的響應那樣在外部 （ included array ）檢索關聯。 可能嗎？

PS1： belongs_to關聯可以正常工作，該關聯位於Relationships 對象內部，如docs中所示。

PS2：之所以要這樣做，是因為我有3個或4個關聯，並且希望從每個對象訪問它們。 這樣，我得到的答復將是一團糟。

Answer 1

您可以通過這樣手動定義項目來實現。

class ProjectGroupSerializer < ActiveModel::Serializer
  attributes :id, :name, :description, :projects

  def projects
    object.projects.map do |project|
      ::ProjectSerializer.new(project).attributes
    end
  end

結束