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[1.11.x] Refs #28814 -- Fixed migrations crash with namespace packages on Python 3.7.

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Due to https://bugs.python.org/issue32303.

Backport of 0f0a07ac278dc2be6da81e519188f77e2a2a00cf from master
This commit is contained in:
Tim Graham 2018-02-05 13:16:57 -05:00
parent b9e248975f
commit 8deb0a8efd
2 changed files with 5 additions and 3 deletions
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5
django/db/migrations/loader.py
View File

@ -89,8 +89,9 @@ class MigrationLoader(object):
continue
raise
else:
# PY3 will happily import empty dirs as namespaces.
if not hasattr(module, '__file__'):
# Empty directories are namespaces.
# getattr() needed on PY36 and older (replace w/attribute access).
if getattr(module, '__file__', None) is None:
self.unmigrated_apps.add(app_config.label)
continue
# Module is not a package (e.g. migrations.py).

3
django/db/migrations/questioner.py
View File

@ -46,7 +46,8 @@ class MigrationQuestioner(object):
except ImportError:
return self.defaults.get("ask_initial", False)
else:
if hasattr(migrations_module, "__file__"):
# getattr() needed on PY36 and older (replace with attribute access).
if getattr(migrations_module, "__file__", None):
filenames = os.listdir(os.path.dirname(migrations_module.__file__))
elif hasattr(migrations_module, "__path__"):
if len(migrations_module.__path__) > 1: