title: Django REST Empty Fields
body: <p>Is there a way to allow for empty fields within the Django REST serilaizer for Boolean and Int fields.</p>
  
  <pre><code>class InputAttributes(serializers.Serializer):
      make = serializers.BooleanField(required=False)
      speed = serializers.IntegerField(required=False)
      color = serializers.CharField(required=False,allow_blank=True)
  </code></pre>
  
  <p>I can use the allow_blank for CharFields but not for the others.
  Based on the above I get,</p>
  
  <pre><code>A valid integer is required
  </code></pre>
  
  <p>Any ideas ? </p>