title: How to display all model fields with ModelSerializer?
body: <p><strong>models.py</strong>:</p>
  
  <pre><code>class Car():
      producer = models.ForeignKey(Producer, blank=True, null=True,)
      color = models.CharField()
      car_model = models.CharField()
      doors = models.CharField()
  </code></pre>
  
  <p><strong>serializers.py</strong>:</p>
  
  <pre><code>class CarSerializer(ModelSerializer):
  
      class Meta:
          model = Car
          fields = Car._meta.get_all_field_names()
  </code></pre>
  
  <p>So, here I want to use all fields. But I have an error:</p>
  
  <p><strong>Field name <code>producer_id</code> is not valid for model <code>Car</code>.</strong></p>
  
  <p>How to fix that? </p>
  
  <p>Thanks!</p>