Look at the the doc here.
There are useful callbacks you can add in your factories:
- after(:build) - called after a factory is built (via FactoryGirl.build, FactoryGirl.create)
- before(:create) - called before a factory is saved (via FactoryGirl.create)
- after(:create) - called after a factory is saved (via FactoryGirl.create)
- after(:stub) - called after a factory is stubbed (via FactoryGirl.build_stubbed)