Question

知道如何通过关联在has_many中实现active_mode_serializer。

我有三种模式：

class Menu < ActiveRecord::Base
    has_many :menu_details, inverse_of: :menu, dependent: :destroy
    has_many :foods, through: :menu_details
end

class Food < ActiveRecord::Base
    has_many :menu_details
    has_many :menu, through: :menu_details
ends

class MenuDetail < ActiveRecord::Base
    belongs_to :menu
    belongs_to :food
end

活动模型序列化程序

class MenuSerializer < ActiveModel::Serializer
  attributes :id, :name, :price
  has_many :menu_details
  has_many :foods
end

class MenuDetailSerializer < ActiveModel::Serializer
  attributes :id

  has_one :menu
  has_one :food
end

class FoodSerializer < ActiveModel::Serializer
  attributes :id

  has_many :menu_details
  has_many :menu

end

我总是得到这个错误：

Completed 500 Internal Server Error in 24ms

SystemStackError (stack level too deep):
 app/controllers/menus_controller.rb:7:in `all'

Answer 1

Edit: the answer below is relevant to AMS 0.8. There are better ways to do this in more recent versions.

You can't have two serializers that has_many / has_one each other. The fix is to create a "short" serializer for each model to be used inside of a related serializer.

For example,

class MenuSerializer < ActiveModel::Serializer
  attributes :id, :name, :price
  has_many :menu_details, serializer: MenuDetailShortSerializer
  has_many :foods, serializer: FoodShortSerializer
end

class MenuDetailShortSerializer < ActiveModel::Serializer
  attributes :id
end

class FoodShortSerializer < ActiveModel::Serializer
  attributes :id
end

SystemStackError（堆栈级别太深）使用Active model Serializer

1 个答案: