With Python 3, there are no more reasons to special-case EmailMessage
arguments which should be plain strings.

Thanks Tim Graham for the review.

Thanks Tim for the review.

Regression in d2a26c1a.

Thanks Adam Alton for the report and test, and Adam Johnson for
suggesting the fix.

The grouping caused an issue with database views as PostgreSQL's query planer
isn't smart enough to introspect primary keys through views. Django doesn't
support database views but documents that unmanaged models should be used to
query them.

Thanks powderflask for the detailed report and investigation.

Thanks Tim Graham for the review.

Not all backends have dots in them.

This is a followup to 2b3a9414

The test was failing when using --keepdb due to a pre-existing
PonyStables model.

Thanks Florian Apolloner for the report

Thanks Tim Graham and Adam Johnson for the reviews.

Thanks Tim Graham for the review.

Follow up to:
ffdf507e (adding GDAL 2.0 support)
ebaa2fef (confirming GDAL 2.1 support)
8c777888 (removing GDAL 1.8, 1.7 support)

Fixed #28089 -- Removed requirement to implement get_short_name() and get_full_name() in AbstractBaseUser subclasses.

When a connection pooler is set up in transaction pooling mode, queries
relying on server-side cursors fail. The DISABLE_SERVER_SIDE_CURSORS
setting in DATABASES disables server-side cursors for this use case.

Fixed #28175 -- Fixed __in lookups on a foreign key when using the foreign key's parent model as the lookup value.

Thanks Simon Charette for review.