Question

Ruby noobie here.

When seeding my database, the association of Haiku -> belongs_to -> User is not persisting correctly via Mongoid. Haiku does not correctly store user_id in Mongo.

Doesn’t work

#seeds.rb

1.upto(100) do
  user = User.create! name: 'foo'
  haiku = Haiku.create! content: 'hello world', user: user
  user.add_point({point_type: :tweet, value: 1, haiku: haiku})
end

Does Work

1.upto(100) do
  user = User.create! name: 'foo'
  haiku = Haiku.new content: 'hello world'
  haiku.user = user
  haiku.save!
  user.add_point({point_type: :tweet, value: 1, haiku: haiku})
end

After digging through the source, I can only assume process_attributes is not setting the relation correctly.

Why does it not work in the before section but does in the after secion?

Answer 1

The mass assignment is trying to set the user and that should work.

It’s not working.

The reason is because attr_accessible is not called for the user reference. This macro needs to be for fields and references alike.