title: Foreign key from one app into another in Django
body: <p>I'm wondering if it's possible to define a foreign key in a models.py file in Django that is a reference to a table in another app?</p>
  
  <p>In other words, I have two apps, called cf and profiles, and in cf/models.py I have (amongst other things):</p>
  
  <pre><code>class Movie(models.Model):
      title = models.CharField(max_length=255)
  </code></pre>
  
  <p>and in profiles/models.py I want to have:</p>
  
  <pre><code>class MovieProperty(models.Model):
      movie = models.ForeignKey(Movie)
  </code></pre>
  
  <p>But I can't get it to work. I've tried:</p>
  
  <pre><code>    movie = models.ForeignKey(cf.Movie)
  </code></pre>
  
  <p>and I've tried importing cf.Movie at the beginning of models.py, but I always get errors, such as:</p>
  
  <pre><code>NameError: name 'User' is not defined
  </code></pre>
  
  <p>Am I breaking the rules by trying to tie two apps together in this way, or have I just got the syntax wrong?</p>