The guarantee that no queries will be made when accessing results is
done by new EmptyWhere class which is used for query.where and having.
Thanks to Simon Charette for reviewing and valuable suggestions.
This is the start of a deprecation path for the depth kwarg on
select_related. Removing this will allow us to update select_related so
it chains properly and have an API similar to prefetch_related.
Thanks to Marc Tamlyn for spearheading and initial patch.
refs #16855
Objects can be fast-path deleted if there are no signals, and there are
no further cascades. If fast-path is taken, the objects do not need to
be loaded into memory before deletion.
Thanks to Jeremy Dunck, Simon Charette and Alex Gaynor for reviewing
the patch.
Deferred models now automatically update only the fields which are
loaded from the db (with .only() or .defer()). In addition, any field
set manually after the load is updated on save.
The qs.bulk_create() method did not work with large batches together
with SQLite3. This commit adds a way to split the bulk into smaller
batches. The default batch size is unlimited except for SQLite3 where
the batch size is limited to 999 SQL parameters per batch.
Thanks to everybody who participated in the discussions at Trac.
This commit tackles a couple of issues. First, in certain cases there
were some mixups if field.attname or field.name should be deferred.
Field.attname is now always used.
Another issue tackled is a case where field is both deferred by
.only(), and selected by select_related. This case is now an error.
A lot of thanks to koniiiik (Michal Petrucha) for the patch, and
to Andrei Antoukh for review.
only consider some fields (PostgreSQL only).
For this, the ``distinct()`` QuerySet method now accepts an optional
list of model fields names and generates ``DISTINCT ON`` clauses on
these cases. Thanks Jeffrey Gelens and Anssi Kääriäinen for their work.
Fixes#6422.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@17244 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Many thanks to akaariai for lots of review and feedback, bug finding,
additional unit tests and performance testing.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16930 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This allows to make these links more resilent to changes in the target URLs.
Thanks Jannis for the report and Aymeric Augustin for the patch.
Fixes#16586.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16720 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Been meaning to do this for a long time. Mostly, this is a lot of
additions of cross references. Within a particular section about foo() I
didn't cross-link foo() calls to itself, but everything else was
cross-linked to its main documentation.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16699 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This was still causing some confusion, so I rewrote the section in the
database notes to encompass both substring matching and non-ASCII
case-insensitive equality checks, as well as putting in a stronger
callout on the "contains" filter.
Refs #16569.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16694 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Nick Sandford
Anssi Kääriäinen
Aymeric Augustin
Tim Graham
Anton Danilchenko
Preston Holmes
Michael Kelly
Andrei Antoukh
Claude Paroz
Julien Phalip
Adrian Holovaty
Luke Plant
Ramiro Morales
Gabriel Hurley
Jannis Leidel
Alex Gaynor
Malcolm Tredinnick