[1.8.x] Fixed #24848 -- Fixed ValueError for faulty migrations module.

Added apps to unmigrated apps if the migrations module is a file
or a folder missing __init__.py.

Thanks to Ernest0x for the bug report.

Backport of d73176a84273c06fa11075c65293ec28497a8423 from master

1 files changed, 2 insertions, 0 deletions

diff --git a/django/db/migrations/loader.py b/django/db/migrations/loader.py
index add2907ca8..fccf7d3205 100644
--- a/django/db/migrations/loader.py
+++ b/django/db/migrations/loader.py
@@ -77,9 +77,11 @@ class MigrationLoader(object):
             else:
                 # PY3 will happily import empty dirs as namespaces.
                 if not hasattr(module, '__file__'):
+                    self.unmigrated_apps.add(app_config.label)
                     continue
                 # Module is not a package (e.g. migrations.py).
                 if not hasattr(module, '__path__'):
+                    self.unmigrated_apps.add(app_config.label)
                     continue
                 # Force a reload if it's already loaded (tests need this)
                 if was_loaded: