Better error messaging if serializer Meta fields list has a bad value

[picturedots]

This is the bug that I originally reported in #2262 -- if you have a ModelSerializer with a field in Meta that doesn't map to a property or model field, serializer.data fails silently in 3.0.2, and returns no value. For example, if 'bad_field' doesn't map to anything you'll see.

class MyModelSerializer(ModelSerializer):
    class Meta:
        model = MyModel
        fields = ('good_field', 'bad_field')

My bad, I should have reported two separate issues earlier.

[tomchristie]

This report doesn't appear correct to me.

• 'fields' items that don't map to a valid field or property will raise an error. https://github.com/tomchristie/django-rest-framework/blob/master/rest_framework/serializers.py#L1016
• we don't check explicitly declared fields, but they will raise an attribute error during serialisation.

Happy to reopen if there's a simple replicable example.
Perhaps I'm misunderstanding the issue you're trying to raise?