如何通过两个引用查询Mongoid文档

时间:2016-01-19 09:17:19

标签: ruby-on-rails-4 mongoid

我在这个项目上使用Mongoid。可以说我有一个这样的模型:

class Voice

  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Enum
  include Mongoid::Paperclip

  enum :status, [:enabled, :disabled], :validate => true, :default => :enabled

  ...

  has_and_belongs_to_many                               :categories
  has_and_belongs_to_many                               :builder_types
  has_and_belongs_to_many                               :voice_types
  has_and_belongs_to_many                               :preferences
  has_and_belongs_to_many                               :languages
  embeds_many                                           :comments
  embeds_many                                           :ratings
  belongs_to                                            :artist,                        :class_name => "User"

  ...

end

如您所见,Voice拥有并属于CategoryBuilderTypeVoiceType等等。目前,如果我想搜索属于特定类别的所有语音,请执行以下操作(伪代码):

@category = Category.find(id)
@voices = @category.voices

哪个工作正常。如何搜索具有或属于多种关系和关系类型的Voice。 (不起作用的伪代码):

@cat1 = Category.find(id)
@cat2 = Category.find(id)
@voice_type = VoiceType.find(id)
@voices = @cat1.voices.where(category_id: @cat2.id).where(voice_type_id: @voice_type.id)

但这并不奏效。任何想法如果1)完全可能和2)我怎么能这样做?

2 个答案:

答案 0 :(得分:1)

这可能对您有用:

Voice.all(category_ids: [@cat1.id, @cat2.id]).
  where(:voice_type_ids.in [@voice_type.id])

答案 1 :(得分:0)

为了将来的参考,最后我做的是:

@voices = Voice.all(category_ids: [@cat_1.id, @cat_2.id]).
  and(voice_type_ids: @voice_type.id).map{ |voice| voice.format_frontend }