title: Post LIST OF OBJECTS from HTML/axios with multipart/form-data to DRF multipart parser
body: <p>This is my serializer:</p>
  
  <pre><code>class ParentSerializer(serializers.ModelSerializer):
      children = ChildSerializer(many=True)  # reverse FK relation
  </code></pre>
  
  <p><code>ParentSerializer</code> also has an image field, so the request has to be multipart/form-data to support both image and data in a single request.</p>
  
  <p>The following code/test works fine:</p>
  
  <pre><code>test_data = QueryDict('', mutable=True)
  dictionary = {
      'name': ['test'],
      'children[0]': [{'key1': 'val1', 'key2': 'val2'}]
  }
  test_data.update(MultiValueDict(dictionary))
  
  test_serializer = self.get_serializer(data=test_data)
  test_serializer.is_valid(raise_exception=True)
  test_instance = test_serializer.save()
  </code></pre>
  
  <p>...because I'm manually creating the <code>children</code> list.</p>
  
  <p>The problem is I'm not able to do the same through axios/HTML form. The data being sent is converted to string.</p>
  
  <p>What are my options? I want to send list of child objects along with other data.</p>
  
  <p><code>DRF v3.9</code> &amp; <code>Django v2.2</code>.</p>