How can I reset a factory_girl sequence?

Question

Provided that I have a project factory

Factory.define :project do |p|
  p.sequence(:title)    { |n| "project #{n} title"                  }
  p.sequence(:subtitle) { |n| "project #{n} subtitle"               }
  p.sequence(:image)    { |n| "../images/content/projects/#{n}.jpg" }
  p.sequence(:date)     { |n| n.weeks.ago.to_date                   }
end

And that I'm creating instances of project

Factory.build :project
Factory.build :project

By this time, the next time I execute Factory.build(:project) I'll receive an instance of Project with a title set to "project 3 title" and so on. Not surprising.

Now say that I wish to reset my counter within this scope. Something like:

Factory.build :project #=> Project 3
Factory.reset :project #=> project factory counter gets reseted
Factory.build :project #=> A new instance of project 1

What would be the best way to achieve this?

I'm currently using the following versions:

factory_girl (1.3.1) factory_girl_rails (1.0)

Thanks in advance, Best regards.

Answer 1

Just call FactoryGirl.reload in your before/after callback. This is defined in the FactoryGirl codebase as:

module FactoryGirl
  def self.reload
    self.factories.clear
    self.sequences.clear
    self.traits.clear
    self.find_definitions
  end
end

Calling FactoryGirl.sequences.clear is not sufficient for some reason. Doing a full reload might have some overhead, but when I tried with/without the callback, my tests took around 30 seconds to run either way. Therefore the overhead is not enough to impact my workflow.