mirrors/django
1
0
Fork 0
mirror of https://github.com/django/django.git synced 2025-10-05 00:00:37 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 4

Fixed #24146 -- Fixed a missing fields regression in admin checks.

Browse source 
This allows using get_field() early in the app loading process.

Thanks to PirosB3 and Tim Graham.
This commit is contained in:
Collin Anderson 2015-01-14 13:29:56 -05:00 • committed by Tim Graham
parent 8e8daf7c9b
commit e8171daf0c
2 changed files with 31 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

28
django/db/models/options.py
View file

@ -487,6 +487,12 @@ class Options(object):
@cached_property
def fields_map(self):
return self._get_fields_map()
def _get_fields_map(self):
# Helper method to provide a way to access this without caching it.
# For example, admin checks run before the app cache is ready and we
# need to be able to lookup fields before we cache the final result.
res = {}
fields = self._get_fields(forward=False, include_hidden=True)
for field in fields:
@ -531,20 +537,26 @@ class Options(object):
return field
except KeyError:
# If the app registry is not ready, reverse fields are
# unavailable, therefore we throw a FieldDoesNotExist exception.
if not self.apps.ready:
pass
if m2m_in_kwargs:
# Previous API does not allow searching reverse fields.
raise FieldDoesNotExist('%s has no field named %r' % (self.object_name, field_name))
# If the app registry is not ready, reverse fields are probably
# unavailable, but try anyway.
if not self.apps.ready:
try:
# Don't cache results
return self._get_fields_map()[field_name]
except KeyError:
raise FieldDoesNotExist(
"%s has no field named %r. The app cache isn't ready yet, "
"so if this is an auto-created related field, it won't "
"so if this is an auto-created related field, it might not "
"be available yet." % (self.object_name, field_name)
)
try:
if m2m_in_kwargs:
# Previous API does not allow searching reverse fields.
raise FieldDoesNotExist('%s has no field named %r' % (self.object_name, field_name))
# Retrieve field instance by name from cached or just-computed
# field map.
return self.fields_map[field_name]