title: Django model, integers as choices
body: <p>could you tell me if the following code is correct? I want to create a drop down that in the django admin will show a dropdown with a selection of integer:</p>
  <pre><code>class Test(TimeStampedModel):
      &quot;&quot;&quot;
      Test specifications
      &quot;&quot;&quot;
      TIME_INTERVALS = Choices(
          ('SECONDS_30', 30)
          ('SECONDS_60', 60)
          ('SECONDS_90', 90)
          ('SECONDS_120', 120)
          ('SECONDS_150', 150)
          ('SECONDS_300', 300)
      )
  
      sample_time = models.PositiveSmallIntegerField(choices=TIME_INTERVALS, default=TIME_INTERVALS.SECONDS_30)
  </code></pre>
  <p>Thank you</p>