title: rails factory girl getting "Email has already been taken"
body: <p>This is my factory girl code, and every time I try to generate a review, it's telling me that "Email has already been taken", i've reset my databases, set the transition in spec_helper to true, but still haven't solved the problem. I'm new to this, am I using the association wrong? Thanks!</p>
  
  <pre><code>Factory.define :user do |user|
    user.name                  "Testing User"
    user.email                 "test@example.com"
    user.password              "foobar"
    user.password_confirmation "foobar"
  end
  
  Factory.define :course do |course|
    course.title "course"
    course.link "www.umn.edu"
    course.sections 21
    course.description "test course description"
    course.association :user
  end
  
  Factory.define :review do |review|
    review.title "Test Review"
    review.content "Test review content"
    review.association :user
    review.association :course
  end
  </code></pre>