 <p>Your definition of your <code>status</code> field is incorrect. CharFields require a "max_length" attribute that is a positive integer.</p> <p>Change it to the following:</p> <pre><code>models.CharField(max_length=..., choices=STATUS_CHOICES) </code></pre> <p>See also <a href="https://docs.djangoproject.com/en/dev/ref/models/fields/#choices" rel="nofollow">here</a></p>