title: How to display the text value of an enum field?
body: <p>I am using <code>django_enumfield</code></p>
  
  <p>My model looks like this:</p>
  
  <pre><code>class GenderValues(enum.Enum):
      NONE = 0
      MALE = 1
      FEMALE = 2
      BOTH = 3
  
  class Gender(models.Model):
      gender = enum.EnumField(GenderValues, default=GenderValues.NONE)
  
      def __str__(self):
          return self.gender
  </code></pre>
  
  <p>I have exposed this model in the admin area as follows:</p>
  
  <pre><code>admin.site.register(Gender)
  </code></pre>
  
  <p>I can then go to the admin area and add a gender.</p>
  
  <p>Problem:</p>
  
  <p>The gender appears as the number (e.g. 1 if I choose 'Male') instead of "MALE".</p>
  
  <p>Note I have tried adding a label to GenderValues like this but it makes no difference:</p>
  
  <pre><code>labels = {
      MALE: 'Male',
  }
  </code></pre>
  
  <p>Do you know how I can display "MALE" or "Male" in the admin area instead of 1?</p>
  
  <p>Thank you.</p>