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django-polymorphic
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Also introduce a new exception type for invalid database IDs

fix_request_path_info
Diederik van der Boor 2017-08-01 11:40:55 +02:00
parent fb8eed78ad
commit 4835cd244e
1 changed files with 5 additions and 1 deletions
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6
polymorphic/models.py
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@ -21,6 +21,10 @@ class PolymorphicTypeUndefined(LookupError):
pass
class PolymorphicTypeInvalid(RuntimeError):
pass
class PolymorphicModel(six.with_metaclass(PolymorphicModelBase, models.Model)):
"""
Abstract base class that provides polymorphic behaviour
@ -105,7 +109,7 @@ class PolymorphicModel(six.with_metaclass(PolymorphicModelBase, models.Model)):
if model is not None \
and not issubclass(model, self.__class__) \
and not issubclass(model, self.__class__._meta.proxy_for_model):
raise RuntimeError("ContentType {0} for {1} #{2} does not point to a subclass!".format(
raise PolymorphicTypeInvalid("ContentType {0} for {1} #{2} does not point to a subclass!".format(
self.polymorphic_ctype_id, model, self.pk,
))
return model