Tastypie "TypeError of type 'NoneType' is not iterable"
A unit test which performed a GET to a Tastypie endpoint always raised the error:
def check_filtering(self, field_name, filter_type='exact', filter_bits=None):
"""
Given a field name, a optional filter type and an optional list of
additional relations, determine if a field can be filtered on.
If a filter does not meet the needed conditions, it should raise an
``InvalidFilterError``.
If the filter meets the conditions, a list of attribute names (not
field names) will be returned.
"""
if filter_bits is None:
filter_bits = []
> if field_name not in self._meta.filtering:
E TypeError: argument of type 'NoneType' is not iterable
The fix was to define filtering to at least be an empty dictionary in the Tastypie resource. For example:
class FooResource(Resource):
class Meta:
filtering = {}