活动模型序列化器 has_many 关联

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

我收到以下回复：

{
  "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"
          }
        }
      }
    }
  ]
}

我想检索 relationships object 内部的关联，而不是 外部（在 includedarray 中），如响应我收到的。有可能吗？

PS1：belongs_to 关联工作正常，关联位于 relationships object 中，就像在文档中一样。

PS2：我想这样做是因为我有 3 或 4 个关联，并且我想从每个对象访问它们。这样我得到回复的方式将是一团糟。

Answer 1

您可以通过像这样手动定义项目来做到这一点。

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

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

结束