title: Django Polls Tutorial No changes detected in app polls
body: <p>I'm going through the Django Polls tutorial, and I'm trying the command "python manage.py makemigrations polls", and I keep getting the message "No changes detected in app 'polls'"</p>
  
  <p>I don't understand what I'm doing wrong or how I could do it differently, or what the message even means.</p>
  
  <p>EDIT for clarity:</p>
  
  <p>I expect something somewhat like the printout on the tutorial:</p>
  
  <pre><code>Migrations for 'polls':
    0001_initial.py:
      - Create model Question
      - Create model Choice
  </code></pre>
  
  <p>And then later in the tutorial, when it requests I type the command <code>python manage.py sqlmigrate polls 0001</code>, that I get some sort of printout like the one shown (which is rather long).  I'm working off the tutorial at <a href="https://docs.djangoproject.com/en/1.7/intro/tutorial01/" rel="nofollow">https://docs.djangoproject.com/en/1.7/intro/tutorial01/</a></p>
  
  <p>Instead, I get</p>
  
  <pre><code>CommandError: Cannot find a migration matching 'polls' form app '0001'. Is it in INSTALLED_APPS?
  </code></pre>