title: Exclude a field from django rest framework serializer
body: <p>In the following serializer, I have a nested serializer [<code>ContainerSerializer</code>] field and I want to exclude a field from (container)<code>ContainerSerializer</code> but I don't want any change in <code>ContainerSerializer</code>. How can I do that?</p>
  
  <pre><code>class BLcontainerMergedSerializer(serializers.ModelSerializer):
      container = ContainerSerializer()
      class Meta:
          model = BLcontainer
  </code></pre>