issue with factory_girl , rpsec 2.0 and rails 3.0 => can't get has_one relation working nicely together!

I'm running rails 3.0, rspec 2.0 and factory_girl. Here is the simplified scenario I'm working with: a user can subscribe to only one plan at a time

# user.rb
class User < ActiveRecord::Base
  has_one :plan
  attr_accessible :login, :plan_id

end

# plan.rb
class Profile < ActiveRecord::Base
 attr_accessible :plan
end

# user_factory.rb
Factory.define :user do |u|
  u.login "test"
  u.association :plan
end

#plan_factory.rb
Factory.define :plan do |p|
   p.name "plan1"
end

when I run rspec spec/models/user_spec.rb I got this error:

Failure/Error: user = Factory(:user) SQLite3::ConstraintException: users.plan_id may not be NULL

#spec/models/user_spec.rb
require File.dirname开发者_如何学Go(__FILE__) + '/../spec_helper'

describe User do
  it "should be valid" do
    user = Factory(:user)
    #User.new.should be_valid
    user.should be_valid
  end
end

what I'm doing wrong? I'm stuck with this very simple scenario, and it is very frustating. at that point BDD slow me down like hell!

---

It looks like you've implemented the has_one association incorrectly. The foreign key in a has_one -- belongs_to relationship should go in the table corresponding to the model with the belongs_to directive. Check db/schema.rb -- I think you'll find that plan_id is defined in the users table. If you want the User model to have one Plan, you'll need to remove plan_id from users and add user_id to plans.

If you'd rather make it so a Plan has one User, keep the schema as is and put has_one :user in Plan and belongs_to :plan in User.

---

A user subscribes to one plan. so a user has one plan and a plan is related to many users. So I think I got it right. the error was in the user factory. replacing

u.association :plan

by

u.association :plan, :factory => :plan

fixed the issue.

Problem solved!