How to dynamically change depth in Django Rest Framework nested serializers?

Question

I have a set of nested serializers which have a depth set on their respective Meta classes. I\'d like to programmatically change the depth based on par

Answer 1

Here is my code that incorporates including/excluding fields, as well as dynamically adjusting the depth. Adjust it to your taste. :)

class DynamicModelSerializer(serializers.ModelSerializer):
"""
A ModelSerializer that takes an additional `fields` argument that
controls which fields should be displayed, and takes in a "nested"
argument to return nested serializers
"""

def __init__(self, *args, **kwargs):
    fields = kwargs.pop("fields", None)
    exclude = kwargs.pop("exclude", None)
    nest = kwargs.pop("nest", None)

    if nest is not None:
        if nest == True:
            self.Meta.depth = 1

    super(DynamicModelSerializer, self).__init__(*args, **kwargs)

    if fields is not None:
        # Drop any fields that are not specified in the `fields` argument.
        allowed = set(fields)
        existing = set(self.fields.keys())
        for field_name in existing - allowed:
            self.fields.pop(field_name)

    if exclude is not None:
        for field_name in exclude:
            self.fields.pop(field_name)