Fabricating Mongoid embedded docs about fabrication HOT 5 CLOSED

To fabricate an embedded document, you need to make sure you set the parent. Let's say you have the following objects

class State
  include Mongoid::Document
  embeds_many :cities
end

class City
  include Mongoid::Document
  embedded_in :state
end

Then you would set the state when you fabricate the city. The safest thing to do is define the Fabricator like this:

Fabricator(:city) do
  state
end

I always recommend putting the minimum in the fabricator that is necessary to generate a valid object. In the case of embedded documents, the parent is required.

If you want to override that in your tests, you would fabricate it like this:

state = Fabricate(:state)
Fabricate(:city, state: state)

from fabrication.

Paul, do you have any thoughts on this with respect to embedded polymorphic documents?

from fabrication.

Here is the example from the mongoid documentation.

class Office
  include Mongoid::Document
  embeds_many :addresses, as: :locatable
end

class Person
  include Mongoid::Document
  embeds_many :addresses, as: :locatable
end

class Address
  include Mongoid::Document
  embedded_in :locatable, polymorphic: true
end

You will have a problem defining the parent in the embedded document's fabricator, as it could be anything. You could have multiple fabricators for the different types and use them when appropriate though.

Fabricator(:address) do
  street '123 Any Street'
  city 'Anytown'
end

Fabricator(:person_address, from: :address) do
  locatable { Fabricate(:person) }
end

Fabricator(:office_address, from: :address) do
  locatable { Fabricate(:office) }
end

The only real snag is that you can't persist an address without specifying the locatable. If one was more common than the other, I might set person as the default locatable for an address and then just override it for the office address fabricator.

from fabrication.

Thanks for the quick reply and the example this solved my issue persisting. Much appreciated!

from fabrication.

you know I have experience with factorygirl and I think fabrication is absolutely better than that, especially for mongoid and for its speed. Thak you for your contribution

from fabrication.