Mondoid在has_many / belongs_to关系中搜索具有倍数的一个文档

Question

我有这种关系

class Cupboard
 include Mongoid::Document
 field :name, type: String
 has_many :ingredients 
end

class Recipe
 include Mongoid::Document
 field :name, type: String
 hes_many :ingredients
end

class Ingredient
 include Mongoid::Document
 field :name, type: String
 field :description, type: String
 belongs_to :cupboard
 belongs_to :recipe
end 

我需要在Cupboard模型中创建一个方法来查找包含与橱柜相同成分的配方，我在Mongoid文档中找不到找到它的方法。

我需要像Recipe.find( #all cupboard.ingredients.ids )

这样的东西

提前致谢

Answer 1

def shared_recipes
  ingredients.map(&:recipe).uniq
end