def __get__(self, instance, instance_type=None):
try:
return SingleRelatedObjectDescriptor.__get__(
self, instance, instance_type)
except self.related.model.DoesNotExist:
setattr(instance, self.cache_name, None)
return None
def __get__(self, instance, instance_type=None):
""" See if we've stored a DoesNotExist exception from last time,
if so, just raise that. Else... do the look up and store
the DoesNotExist exception if we get one.
"""
if getattr(instance, self.cache_name, None) is None:
previous_exc = getattr(instance, self.get_exception_cache_name(), None)
if previous_exc:
raise previous_exc
try:
#This is effectively super(), but because it's __get__ it's a little bit magical...
return SingleRelatedObjectDescriptor.__get__(self, instance, instance_type)
except self.related.model.DoesNotExist, e:
setattr(instance, self.get_exception_cache_name(), e)
raise
def __get__(self, instance, instance_type=None):
""" See if we've stored a DoesNotExist exception from last time,
if so, just raise that. Else... do the look up and store
the DoesNotExist exception if we get one.
"""
if getattr(instance, self.cache_name, None) is None:
previous_exc = getattr(instance, self.get_exception_cache_name(),
None)
if previous_exc:
raise previous_exc
try:
#This is effectively super(), but because it's __get__ it's a little bit magical...
return SingleRelatedObjectDescriptor.__get__(
self, instance, instance_type)
except self.related.model.DoesNotExist, e:
setattr(instance, self.get_exception_cache_name(), e)
raise
def __get__(self, instance, instance_type=None):
try:
return SingleRelatedObjectDescriptor.__get__(self, instance, instance_type)
except self.related.model.DoesNotExist:
setattr(instance, self.cache_name, None)
return None