Factory-girl create that bypasses my model validation

Question

I am using Factory Girl to create two instances in my model/unit test for a Group. I am testing the model to check that a call to .current returns only the \'current\' groups ac

Answer 1

Your factories should create valid objects by default. I found that transient attributes can be used to add conditional logic like this:

transient do
  skip_validations false
end

before :create do |instance, evaluator|
  instance.save(validate: false) if evaluator.skip_validations
end

In your test:

create(:group, skip_validations: true)

Answer 2

Or you can use both FactoryBot and Timecop with something like:

trait :expired do
  transient do
    travel_backward_to { 2.days.ago }
  end
  before(:create) do |_instance, evaluator|
    Timecop.travel(evaluator.travel_backward_to)
  end
  after(:create) do
    Timecop.return
  end
end

let!(:expired_group) { FactoryGirl.create(:group, :expired, travel_backward_to: 5.days.ago, expiry: Time.now - 3.days) }

Edit: Do not update this event after creation or validations will fail.

Answer 3

This isn't very specific to FactoryGirl, but you can always bypass validations when saving models via save(:validate => false):

describe ".current" do
  let!(:current_group) { FactoryGirl.create(:group) }
  let!(:old_group) {
    g = FactoryGirl.build(:group, :expiry => Time.now - 3.days)
    g.save(:validate => false)
    g
  }

  specify { Group.current.should == [current_group] }
end

Answer 4

Depending on your scenario you could change validation to happen only on update. Example: :validates :expire_date, :presence => true, :on => [:update ]

Answer 5

foo = build(:foo).tap{ |u| u.save(validate: false) }

Answer 6

It's a bad idea to skip validations by default in factory. Some hair will be pulled out finding that.

The nicest way, I think:

trait :skip_validate do
  to_create {|instance| instance.save(validate: false)}
end

Then in your test:

create(:group, :skip_validate, expiry: Time.now + 1.week)