It has been superseded by the converter infrastructure.

Took advantage of the new database adapters and converters.

The primary use case is to interact with a third-party database (not
primarily managed by Django) that doesn't support time zones and where
datetimes are stored in local time when USE_TZ is True.

Configuring a PostgreSQL database with the TIME_ZONE option while USE_TZ
is False used to result in silent data corruption. Now this is an error.

This mirrors convert_xxxfield_value nicely, taking advantage of the
adapter/converter terminology which is commonly used by DB-API modules.

Refs #23820.

Fixed #19738.

Refs #17755. In order not to introduce a regression for raw queries,
parameters are passed through the connection.ops.value_to_db_* methods,
depending on their type.

Put the types in the same order and checked for None consistently.

Refs #23820.

Deprecation warning was introduced in https://bugs.python.org/issue24134

Thanks Carl Meyer and Tim Graham for the reviews.

Thanks Thomas Recouvreux for the report and Tim Graham for the tests and
review.

This fixes a regression with runtests.py --reverse after
bd53db5e

We need to avoid leaking model registration in the default AdminSite.

Thanks Luis Del Giudice for the report, and Aymeric Augustin and Markus
Holtermann for the reviews.

Arguments shown in example code (signal, sender, instance) appeared to
be the incorrect positional arguments for a post_save signal (which
might start as: sender, instance, created), as documented:
​https://docs.djangoproject.com/en/1.8/ref/signals/#post-save

Fixed in master by b68212f5.

Forwardport of 290c9d66 from stable/1.8.x

Fixed situation when parent abstract model declares related_name='+',
and child models had an invalid queryset.

Thanks Tim Graham for the review.

When the query's model had a self-referential foreign key, the
compiler.get_group_by() code incorrectly used the self-referential
foreign key's column (for example parent_id) as GROUP BY clause
when it should have used the model's primary key column (id).