我有一个以下协会
Class Person
include Mongoid::Document
embeds_many :employments
end
Class Employment
include Mongoid::Document
references_many :centres
end
class Centre
include Mongoid::Document
referenced_in :employment
end
现在当我尝试
Person.first.employments.first.centres.build
它给了我这样的错误
NoMethodError: undefined method `centres' for #<Employment:0x000001023f38f8>
我做错什么了吗?
或者嵌入的文档不能引用许多其他文档?