Cannot use "source" in "extra_kwargs" for ModelSerializer #3193
Description
When a model field is specified only in Meta class, adding source to extra_kwargs does not work as expected. Example:
from django.db import models
from rest_framework import serializers
class TestModel(models.Model):
name = models.CharField(max_length=32)
class TestModelSerializer(serializers.ModelSerializer):
class Meta(object):
model = TestModel
fields = ('another_name',)
extra_kwargs = {
'another_name': {'source': 'name'}
}This code raises ImproperlyConfigured: Field name another_nameis not valid for modelTestModel..