django.git/django/db/models/sql/query.py, branch 1.5.7

[1.5.x] Fixed prefetch_related + pickle regressions

2013-05-21T08:45:24Z

There were a couple of regressions related to field pickling. The regressions were introduced by QuerySet._known_related_objects caching. The regressions aren't present in master, the fix was likely in f403653cf146384946e5c879ad2a351768ebc226. Fixed #20157, fixed #20257. Also made QuerySets with model=None picklable.

[1.5.x] Fixed #20091 -- Oracle null promotion for empty strings

2013-03-26T13:05:37Z

Backpatch of e17fa9e877e84e93b699c2bd13ea48dbbb86e451

[1.5.x] Fixed #19672 -- Error in negated Q() filtering

2013-02-20T19:57:39Z

There was a variable overwrite error in negated join filtering. This happened when add_filter() was adding the IS NULL condition to the WHERE clause. This is not a backport from master as there have been some other refactorings which made this patch irrelevant. The patch is from Ian Kelly.

[1.5.x] Fixed #14694 -- Made ``defer()`` work with reverse relations

2012-11-28T16:25:34Z

Reverse o2o fields are now usable with defer. Backpatch of [6ebf115206289bce8f3d86318871faac13d6e835]

[1.5.x] Fixed #18375 -- Removed dict-ordering dependency for F-expressions

2012-11-23T18:07:50Z

F() expressions reuse joins like any lookup in a .filter() call - reuse multijoins generated in the same .filter() call else generate new joins. Also, lookups can now reuse joins generated by F(). This change is backwards incompatible, but it is required to prevent dict randomization from generating different queries depending on .filter() kwarg ordering. The new way is also more consistent in how joins are reused. Backpatch of 90b86291d022a09031d1df397d7aaebc30e435f7

Removed use of SortedDict for query.alias_refcount

2012-11-13T21:01:34Z

This will have a smallish impact on performance. Refs #19276.

Fixed regression caused by #19102

2012-10-25T16:13:10Z

Fixed #19102 -- Fixed fast-path delete for modified SELECT clause cases

2012-10-25T14:16:44Z

There was a bug introduced in #18676 which caused fast-path deletes implemented as "DELETE WHERE pk IN " to fail if the SELECT clause contained additional stuff (for example extra() and annotate()). Thanks to Trac alias pressureman for spotting this regression.

Fixed #19087 -- Ensured query's base table is never LOUTER joined

2012-10-08T15:40:09Z

This fixes a regression created by join promotion logic refactoring: 01b9c3d5193fe61b82ae8b26242a13fdec22f211 Thanks to Ivan Virabyan for the report.

Internal refactoring; moving LOOKUP_SEP up one level.

2012-09-08T23:51:36Z

In an ideal world, nothing except django.db.models.query should have to import stuff from django.models.sql.*. A few things were needing to get hold of sql.constants.LOOKUP_SEP, so this commit moves it up to django.db.models.constants.LOOKUP_SEP. There are still a couple of places (admin) poking into sql.* to get QUERY_TERMS, which is unfortunate, but a slightly different issue and harder to adjust.