title: django can't resolve attribute name
body: <p>Can anyone see the source of this error?</p>
  
  <pre><code>django.core.exceptions.FieldError: Cannot resolve keyword 'client' into field. Choices are: auditstatushistory, file_num, invoice
  </code></pre>
  
  <p>The statement that is causing the problem is:</p>
  
  <pre><code>for invoice in Invoice.objects.filter(matter__client__servicer_code = "XXX"):
  </code></pre>
  
  <p>And the definition of Matter, which does contain file_num, and auditstatushistory and invoice as related attributes, is :</p>
  
  <pre><code>class Matter(models.Model):
      file_num = models.CharField(max_length=20, primary_key=True)
      client = models.ForeignKey("Client", db_column="client_code", 
                                 related_name="client")
  </code></pre>
  
  <p>the only "odd" thing in here is that client did not exist as a foreign key when I set up the database originally, so I added client_code to the underlying matter table via</p>
  
  <pre><code>alter table foo_matter add client_code varchar(10) null;
  </code></pre>
  
  <p>And there is no foreign key in the database linking client and matter.  The only thing I can think of is that I did not name the column correctly in my foo_matter table.  But I can't run syncdb to try it out because South has been installed.</p>
  
  <p>UPDATE:</p>
  
  <p>Just for giggles, I tried starting with a brand-new database, commented out South, and just did a "syncdb" to see what table definitions Django would create.  It created the Client and Matter tables, but did NOT create client_code (or client_id) field to store the foreign key information.  </p>
  
  <p>Has anyone seen a situation like this, where Django just does not create a field?  </p>