Populating an association with children in factory_girl

Question

I have a model Foo that has_many \'Bar\'. I have a factory_girl factory for each of these objects. The factory for Bar has an association to Foo; it will instan

Answer 1

The Factory.after_ hooks appear to be the only way to do this successfully. I've figured out a way to maintain the build strategy without duplicating code:

Factory.define :foo do |f|
  f.name "A Foo"
  f.after(:build) { |foo|
    foo.bars << Factory.build(:bar, :foo => foo)
  }
  f.after(:create) { |foo|
    foo.bars.each { |bar| bar.save! }
  }
end

The documentation states that after_build will be called before after_create if the :create build strategy is used. If :build is used, then only after_build is called, and everyone is happy.

I've also created an abstracted generally-applicable version at this gist to keep things DRY.