Linan

One field that is `required=False, allow_null=True` and not provided. to_representation should not explicitly set it to None

8

#### Problem Statement Currently, one field that is`required=False, allow_null=True` and not provided. `to_representation` should not explicitly set it to None. #### Maybe [rest_framework/fields.py](https://github.com/encode/django-rest-framework/tree/3.15.2/rest_framework/fields.py) ```python def get_attribute(self, instance """ Given the...