Django 2.2.1 release notes

May 1, 2019

Django 2.2.1 fixes several bugs in 2.2.

Bugfixes

• Fixed a regression in Django 2.1 that caused the incorrect quoting of database user password when using dbshell on Oracle (#30307).
• Added compatibility for psycopg2 2.8 (#30331).
• Fixed a regression in Django 2.2 that caused a crash when loading the template for the technical 500 debug page (#30324).
• Fixed crash of ordering argument in ArrayAgg and StringAgg when it contains an expression with params (#30332).
• Fixed a regression in Django 2.2 that caused a single instance fast-delete to not set the primary key to None (#30330).
• Prevented makemigrations from generating infinite migrations for check constraints and partial indexes when condition contains a range object (#30350).
• Reverted an optimization in Django 2.2 (#29725) that caused the inconsistent behavior of count() and exists() on a reverse many-to-many relationship with a custom manager (#30325).
• Fixed a regression in Django 2.2 where Paginator crashes if object_list is a queryset ordered or aggregated over a nested JSONField key transform (#30335).
• Fixed a regression in Django 2.2 where IntegerField validation of database limits crashes if limit_value attribute in a custom validator is callable (#30328).
• Fixed a regression in Django 2.2 where SearchVector generates SQL that is not indexable (#30385).
• Fixed a regression in Django 2.2 that caused an exception to be raised when a custom error handler could not be imported (#30318).
• Relaxed the system check added in Django 2.2 for the admin app’s dependencies to reallow use of SessionMiddleware subclasses, rather than requiring django.contrib.sessions to be in INSTALLED_APPS (#30312).
• Increased the default timeout when using Watchman to 5 seconds to prevent falling back to StatReloader on larger projects and made it customizable via the DJANGO_WATCHMAN_TIMEOUT environment variable (#30361).
• Fixed a regression in Django 2.2 that caused a crash when migrating permissions for proxy models if the target permissions already existed. For example, when a permission had been created manually or a model had been migrated from concrete to proxy (#30351).
• Fixed a regression in Django 2.2 that caused a crash of runserver when URLConf modules raised exceptions (#30323).
• Fixed a regression in Django 2.2 where changes were not reliably detected by auto-reloader when using StatReloader (#30323).
• Fixed a migration crash on Oracle and PostgreSQL when adding a check constraint with a contains, startswith, or endswith lookup (or their case-insensitive variant) (#30408).
• Fixed a migration crash on Oracle and SQLite when adding a check constraint with condition contains | (OR) operator (#30412).