How to set the collection name in Mongoid for a subclass?

Question

class Foo
  include Mongoid::Document
end

class Bar < Foo
end

Foo.all returns Bars, and Bar.all returns Foos.

I want to put Foo and Bar in separate collections.

I tried

class Bar < Foo
  store_in collection: 'bars'

but got

Mongoid::Errors::InvalidStorageParent:
Problem:
  Invalid store_in call on class Bar.
Summary:
  The :store_in macro can only be called on a base Mongoid Document

Using Mongoid 4.0.2

Answer 1

You need to make Bar a Mongoid document as well.

class Bar < Foo
  include Mongoid::Document
  store_in collection: 'bars'