小编ljl*_*ano的帖子

Rails 4.2.5, Mongoid 5.1.0

我有三个型号- Mailbox,Communication和Message.

mailbox.rb

class Mailbox
    include Mongoid::Document
    belongs_to :user
    has_many :communications
end

communication.rb

class Communication
    include Mongoid::Document
    include Mongoid::Timestamps
    include AASM

    belongs_to :mailbox
    has_and_belongs_to_many :messages, autosave: true

    field :read_at,     type: DateTime
    field :box,         type: String
    field :touched_at,  type: DateTime
    field :import_thread_id, type: Integer
    scope :inbox, -> { where(:box => 'inbox') }
end

message.rb

class Message
    include Mongoid::Document
    include Mongoid::Timestamps

    attr_accessor :communication_id

    has_and_belongs_to_many :communications, autosave: true
    belongs_to :from_user, class_name: 'User'
    belongs_to …