Factory-girl create that bypasses my model validation

问题

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 according to the expiry attribute as per below...

  describe ".current" do
    let!(:current_group) { FactoryGirl.create(:group, :expiry => Time.now + 1.week) }
    let!(:expired_group) { FactoryGirl.create(:group, :expiry => Time.now - 3.days) }

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

My problem is that I've got validation in the model that checks a new group's expiry is after today's date. This raises the validation failure below.

  1) Group.current 
     Failure/Error: let!(:expired_group) { FactoryGirl.create(:group, :expiry => Time.now - 3.days) }
     ActiveRecord::RecordInvalid:
       Validation failed: Expiry is before todays date

Is there a way to forcefully create the Group or get around the validation when creating using Factory Girl?

回答1:

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

回答2:

I prefer this solution from https://github.com/thoughtbot/factory_girl/issues/578.

Inside the factory:

to_create {|instance| instance.save(validate: false) }

EDIT:

As mentioned in the referenced thread, and by other's comments/solutions, you'll likely want to wrap this in a trait block to avoid confusion/issues elsewhere in your tests; for example, when you're testing your validations.

回答3:

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)

回答4:

For this specific date-baesd validation case, you could also use the timecop gem to temporarily alter time to simulate the old record being created in the past.

回答5:

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

回答6:

It is not best to skip all validation of that model.

create spec/factories/traits.rb file.

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

fix spec

describe ".current" do
  let!(:current_group) { FactoryGirl.create(:group, :skip_validate, :expiry => Time.now + 1.week) }
  let!(:expired_group) { FactoryGirl.create(:group, :skip_validate, :expiry => Time.now - 3.days) }

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

回答7:

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)

回答8:

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

来源：https://stackoverflow.com/questions/9322353/factory-girl-create-that-bypasses-my-model-validation