Django 2.1.1 release notes

August 31, 2018

Django 2.1.1 fixes several bugs in 2.1.

Bugfixes

• Fixed a race condition in QuerySet.update\_or\_create() that could result
  in data loss (#29499).
• Fixed a regression where QueryDict.urlencode() crashed if the dictionary
  contains a non-string value (#29627).
• Fixed a regression in Django 2.0 where using manage.py test --keepdb
  fails on PostgreSQL if the database exists and the user doesn’t have
  permission to create databases (#29613).
• Fixed a regression in Django 2.0 where combining Q objects with \_\_in
  lookups and lists crashed (#29643).
• Fixed translation failure of DurationField’s “overflow” error message
  (#29623).
• Fixed a regression where the admin change form crashed if the user doesn’t
  have the ‘add’ permission to a model that uses TabularInline
  (#29637).
• Fixed a regression where a related\_query\_name reverse accessor wasn’t set
  up when a GenericRelation is declared on an abstract base model
  (#29653).
• Fixed the test client’s JSON serialization of a request data dictionary for
  structured content type suffixes (#29662).
• Made the admin change view redirect to the changelist view after a POST if
  the user has the ‘view’ permission (#29663).
• Fixed admin change view crash for view-only users if the form has an extra
  form field (#29682).
• Fixed a regression in Django 2.0.5 where QuerySet.values() or
  values\_list() after combining querysets with extra() with
  union(), difference(), or intersection() crashed due to
  mismatching columns (#29694).
• Fixed crash if InlineModelAdmin.has\_add\_permission() doesn’t accept the
  obj argument (#29723).