The added promotion logic is based on promoting any joins used in only
some of the childs of an OR clause unless the join existed before the
OR clause addition.
The ORM didn't reuse joins for direct foreign key traversals when using
chained filters. For example:
qs.filter(fk__somefield=1).filter(fk__somefield=2))
produced two joins.
As a bonus, reverse onetoone filters can now reuse joins correctly
The regression was caused by the join() method refactor in commit
68847135bc
Thanks for Simon Charette for spotting some issues with the first draft
of the patch.
This is necessary because get_model() checks are case insensitive, and if the swapable check isn't, the
swappable logic gets tied up in knots with models that are partially swapped out.
Thanks to chris@cogdon.org for the report and extensive analysis, and Preston for his work on the draft patch.
This is a rather large refactoring. The "lookup traversal" code was
splitted out from the setup_joins. There is now names_to_path() method
which does the lookup traveling, the actual work of setup_joins() is
calling names_to_path() and then adding the joins found into the query.
As a side effect it was possible to remove the "process_extra"
functionality used by genric relations. This never worked for left
joins. Now the extra restriction is appended directly to the join
condition instead of the where clause.
To generate the extra condition we need to have the join field
available in the compiler. This has the side-effect that we need more
ugly code in Query.__getstate__ and __setstate__ as Field objects
aren't pickleable.
The join trimming code got a big change - now we trim all direct joins
and never trim reverse joins. This also fixes the problem in #10790
which was join trimming in null filter cases.
The trim argument was used by split_exclude() only to trim the last
join from the given lookup. It is cleaner to just trim the last part
from the lookup in split_exclude() directly so that there is no need
to burden add_filter() with the logic needed for only split_exclude().
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.
The select_related code got confused when it needed to travel a
reverse relation to a model which had different parent than the
originally travelled relation.
Thanks to Trac aliases shauncutts for report and ungenio for original
patch (committed patch is somewhat modified version of that).
The problem is the same as in #10888 which was reintroduced when
bulk_insert was added. Thanks to Jani Tiainen for report, patch and
also testing the final patch on Oracle GIS.
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
The dupe avoidance logic was removed as it doesn't seem to do anything,
it is complicated, and it has nearly zero documentation.
The removal of dupe_avoidance allowed for refactoring of both the
implementation and signature of Query.join(). This refactoring cascades
again to some other parts. The most significant of them is the changes
in qs.combine(), and compiler.select_related_descent().
There was a potential data-loss issue involved -- when clearing
instance's m2m assignments it was possible some other instance's
m2m data was deleted instead.
This commit also improved None handling for to_field cases.
The Query.select and Query.select_fields were collapsed into one list
because the attributes had to be always in sync. Now that they are in
one attribute it is impossible to edit them out of sync.
Similar collapse was done for Query.related_select_cols and
Query.related_select_fields.
There was a bug introduced in #18676 which caused fast-path deletes
implemented as "DELETE WHERE pk IN <subquery>" to fail if the SELECT
clause contained additional stuff (for example extra() and annotate()).
Thanks to Trac alias pressureman for spotting this regression.
Done for consistency with Q() expressions and QuerySet combining. This
will allow usage of '&' and '|' as boolean logical operators in the
future. Refs #16211.
RETURNING is an extension of the SQL standard, which is not implemented
the same by all databases. Allow DatabaseOperations.return_insert_id to
return a None to allow for other 3rd party backends with a different
implementation.
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.
Thanks to the many people that contributed to the development and review of
this patch, including (but not limited to) Jacob Kaplan-Moss, Anssi
Kääriäinen, Ramiro Morales, Preston Holmes, Josh Ourisman, Thomas Sutton,
and Roger Barnes, as well as the many, many people who have contributed to
the design discussion around this ticket over many years.
Squashed commit of the following:
commit d84749a0f0
Merge: 531e7717c11b1a
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Wed Sep 26 18:37:04 2012 +0800
Merge remote-tracking branch 'django/master' into t3011
commit 531e7715da
Merge: 29d1abb1f84b04
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Wed Sep 26 07:09:23 2012 +0800
Merged recent trunk changes.
commit 29d1abbe35
Merge: 8a527dd54c81a1
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Mon Sep 24 07:49:46 2012 +0800
Merge remote-tracking branch 'django/master' into t3011
commit 8a527dda13
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Mon Sep 24 07:48:05 2012 +0800
Ensure sequences are reset correctly in the presence of swapped models.
commit e2b6e22f29
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 23 17:53:05 2012 +0800
Modifications to the handling and docs for auth forms.
commit 98aba856b5
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 23 15:28:57 2012 +0800
Improved error handling and docs for get_user_model()
commit 0229209c84
Merge: 6494bf98599f64
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 23 14:50:11 2012 +0800
Merged recent Django trunk changes.
commit 6494bf91f2
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Mon Sep 17 21:38:44 2012 +0800
Improved validation of swappable model settings.
commit 5a04cde342
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Mon Sep 17 07:15:14 2012 +0800
Removed some unused imports.
commit ffd535e413
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 16 20:31:28 2012 +0800
Corrected attribute access on for get_by_natural_key
commit 913e1ac84c
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 16 20:12:34 2012 +0800
Added test for proxy model safeguards on swappable models.
commit 280bf19e94
Merge: dbb3900935a863
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 16 18:16:49 2012 +0800
Merge remote-tracking branch 'django/master' into t3011
commit dbb3900775
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 16 18:09:27 2012 +0800
Fixes for Python 3 compatibility.
commit dfd72131d8
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 16 15:54:30 2012 +0800
Added protection against proxying swapped models.
commit abcb027190
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 16 15:11:10 2012 +0800
Cleanup and documentation of AbstractUser base class.
commit a9491a8776
Merge: fd8bb4e08bcb4a
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 16 14:46:49 2012 +0800
Merge commit '08bcb4aec1ed154cefc631b8510ee13e9af0c19d' into t3011
commit fd8bb4e3e4
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 16 14:20:14 2012 +0800
Documentation improvements coming from community review.
commit b550a6d06d
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 16 13:52:47 2012 +0800
Refactored skipIfCustomUser into the contrib.auth tests.
commit 52a02f1110
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 16 13:46:10 2012 +0800
Refactored common 'get' pattern into manager method.
commit b441a6bbc7
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 16 13:41:33 2012 +0800
Added note about backwards incompatible change to admin login messages.
commit 08bcb4aec1
Author: Anssi Kääriäinen <akaariai@gmail.com>
Date: Sat Sep 15 18:30:33 2012 +0300
Splitted User to AbstractUser and User
commit d9f5e5addb
Author: Anssi Kääriäinen <akaariai@gmail.com>
Date: Sat Sep 15 18:30:02 2012 +0300
Reworked REQUIRED_FIELDS + create_user() interaction
commit 579f152e4a
Merge: 918497293e6733
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sat Sep 15 20:18:37 2012 +0800
Merge remote-tracking branch 'django/master' into t3011
commit 918497218c
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sat Sep 15 20:18:19 2012 +0800
Deprecate AUTH_PROFILE_MODULE and get_profile().
commit 334cdfc1bb
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sat Sep 15 20:00:12 2012 +0800
Added release notes for new swappable User feature.
commit 5d7bb22e8d
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sat Sep 15 19:59:49 2012 +0800
Ensure swapped models can't be queried.
commit 57ac6e3d32
Merge: f2ec915abfba3b
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sat Sep 15 14:31:54 2012 +0800
Merge remote-tracking branch 'django/master' into t3011
commit f2ec915b20
Merge: 19526565e99a3d
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 9 08:29:51 2012 +0800
Merge remote-tracking branch 'django/master' into t3011
commit 19526563b5
Merge: 2c5e833c4aa26a
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 9 08:22:26 2012 +0800
Merge recent changes from master.
commit 2c5e833a30
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 9 07:53:46 2012 +0800
Corrected admin_views tests following removal of the email fallback on admin logins.
commit 20d1892491
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sun Sep 9 01:00:37 2012 +0800
Added conditional skips for all tests dependent on the default User model
commit 40ea8b8882
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sat Sep 8 23:47:02 2012 +0800
Added documentation for REQUIRED_FIELDS in custom auth.
commit e6aaf65970
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Sat Sep 8 23:20:02 2012 +0800
Added first draft of custom User docs.
Thanks to Greg Turner for the initial text.
commit 75118bd242
Author: Thomas Sutton <me@thomas-sutton.id.au>
Date: Mon Aug 20 11:17:26 2012 +0800
Admin app should not allow username discovery
The admin app login form should not allow users to discover the username
associated with an email address.
commit d088b3af58
Author: Thomas Sutton <me@thomas-sutton.id.au>
Date: Mon Aug 20 10:32:13 2012 +0800
Admin app login form should use swapped user model
commit 7e82e83d67
Merge: e29c01039aa890
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Fri Sep 7 23:45:03 2012 +0800
Merged master changes.
commit e29c010beb
Merge: 8e3fd7030bdf22
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Mon Aug 20 13:12:57 2012 +0800
Merge remote-tracking branch 'django/master' into t3011
commit 8e3fd703d0
Merge: 507bb5026e0ba0
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Mon Aug 20 13:09:09 2012 +0800
Merged recent changes from trunk.
commit 507bb50a92
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Mon Jun 4 20:41:37 2012 +0800
Modified auth app so that login with alternate auth app is possible.
commit dabe362836
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Mon Jun 4 20:10:51 2012 +0800
Modified auth management commands to handle custom user definitions.
commit 7cc0baf89d
Author: Russell Keith-Magee <russell@keith-magee.com>
Date: Mon Jun 4 14:17:28 2012 +0800
Added model Meta option for swappable models, and made auth.User a swappable model
Thanks to Jeremy Dunck for pointing out the problem with this change. If in a
single transaction, the master deletes a record and then get_or_creates a
similar record, under the new behavior the get_or_create would find the record
in the slave db and fail to re-create it, leaving the record nonexistent, which
violates the contract of get_or_create that the record should always exist
afterwards. We need to do everything against the master here in order to ensure
correctness.
This reverts commit 901af86550.
When doing deeper than one level select_related() + only queries(), the
code introduced in b6c356b7bb errored
incorrectly.
Thanks to mrmachine for report & test case.
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.
Unlike other model fields, the newly introduced (1.4)
GenericIPAddressField did not accept verbose_name and name as the
first positional arguments. This commit fixes it.
Thanks Dan McGee for the report and the patch.
The joins for nested nullable foreign keys were often created as INNER
when they should have been OUTER joins. The reason was that only the
first join in the chain was promoted correctly. There were also issues
with select_related etc.
The basic structure for this problem was:
A -[nullable]-> B -[nonnull]-> C
And the basic problem was that the A->B join was correctly LOUTER,
the B->C join not.
The major change taken in this patch is that now if we promote a join
A->B, we will automatically promote joins B->X for all X in the query.
Also, we now make sure there aren't ever join chains like:
a LOUTER b INNER c
If the a -> b needs to be LOUTER, then the INNER at the end of the
chain will cancel the LOUTER join and we have a broken query.
Sebastian reported this problem and did also major portions of the
patch.
The ORM generated a query with INNER JOIN instead of LEFT OUTER JOIN
in a somewhat complicated case. The main issue was that there was a
chain of nullable FK -> non-nullble FK, and the join promotion logic
didn't see the need to promote the non-nullable FK even if the
previous nullable FK was already promoted to LOUTER JOIN. This resulted
in a query like a LOUTER b INNER c, which incorrectly prunes results.
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.
* Renamed the __unicode__ methods
* Applied the python_2_unicode_compatible decorator
* Removed the StrAndUnicode mix-in that is superseded by
python_2_unicode_compatible
* Kept the __unicode__ methods in classes that specifically
test it under Python 2
* Renamed smart_unicode to smart_text (but kept the old name under
Python 2 for backwards compatibility).
* Renamed smart_str to smart_bytes.
* Re-introduced smart_str as an alias for smart_text under Python 3
and smart_bytes under Python 2 (which is backwards compatible).
Thus smart_str always returns a str objects.
* Used the new smart_str in a few places where both Python 2 and 3
want a str.
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.
Cleared aggregations on add_date_select method so only distinct dates
are returned when dealing with a QuerySet that contained aggregations.
That would cause the query set to return repeated dates because it
would look for distinct (date kind, aggregation) pairs.
At least Oracle needs parentheses in negated where conditions, even if
there is only single condition negated. Fixed this by reverting to old
logic in that part of as_sql() and adding a comment about this.
I did not investigate why the parentheses are needed. The original
offending commit was bd283aa844.
Made sure the WhereNode.as_sql() handles various EmptyResultSet and
FullResultSet conditions correctly. Also, got rid of the FullResultSet
exception class. It is now represented by '', [] return value in the
as_sql() methods.
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.
Generic cleanup and dead code removal in deferred model field loading
and model.__reduce__().
Also fixed an issue where if an inherited model with a parent field
chain parent_ptr_id -> id would be deferred loaded, then accessing
the id field caused caused a database query, even if the id field's
value is already loaded in the parent_ptr_id field.
When order_by causes new joins to be added to the query, the joins must
be LEFT OUTER joins for nullable relations, otherwise the order_by
could cause the results to be altered. This commit fixes the logic to
only promote new joins, previously all joins in the order_by lookup
path were promoted.
Thanks to Bruno Desthuilliers for spotting this corner case.
This was recently fixed for one-to-one relations; this patch adds
support for foreign keys. Thanks kaiser.yann for the report and
the initial version of the patch.
Databases with update_can_self_select = False (MySQL for example)
generated non-necessary queries when saving a multitable inherited
model, and when the save resulted in update.
after the full file name is generated by the storage class.
Thanks Refefer for the report, carsongee for the patch, and
everyone else involved in the discussion.
Added the ability to update only part of the model's fields in
model.save() by introducing a new kwarg "update_fields". Thanks
to all the numerous reviewers and commenters in the ticket
Fixed#18248 -- proxy models were added to included_inherited_models
in sql.query.Query. The variable is meant to be used for multitable
inheritance only. This mistake caused problems in situations where
proxy model's query was reused.
Fixed#17957 -- when using Oracle and character fields, the fields
were set null = True to ease the handling of empty strings. This
caused problems when using multiple databases from different vendors,
or when the character field happened to be also a primary key.
The handling was changed so that NOT NULL is not emitted on Oracle
even if field.null = False, and field.null is not touched otherwise.
Thanks to bhuztez for the report, ramiro for triaging & comments,
ikelly for the patch and alex for reviewing.
QuerySet had previously some complex logic for dealing with nullable
fields in negated add_filter() calls. It seems the logic is leftover
from a time where the WhereNode wasn't as intelligent in handling
field__in=[] conditions.
Thanks to aaugustin for comments on the patch.
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
After this commit, timezones.AdminTests will raise warnings because the sessions contrib app hasn't been upgraded to support time zones yet.
This will be fixed in an upcoming commit.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@17117 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Also ensured that datetime_safe is used wherever strftime is called on dates/datetimes that may be before 1900.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16978 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Thanks to akaariai for the report and tests.
No tests have been added, since unittests for termination are basically
impossible, and the failure condition will take down the developer's machine
in this case. It has been tested against the cases in #17014.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16940 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
The related manager classes are defined within functions, and the methods
had inconsistent and confusing usage of closures vs. parameters on self to
retrieve needed information. Everything is stored on self now.
Also some methods were not using super() where they should have been.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16913 bcc190cf-cafb-0310-a4f2-bffc1f526a37
In r16679 a test was added to verify something had been fixed when a
unicode string type was passed in as a model name. The name has to be
ASCII convertible, but in Python 2.6 and earlier, it must also have str
type.
This commit fixes the problem for earlier Python versions and is almost
identical to a patch from b.leskes in #6045.
Fixes#16689. Refs #6045.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16682 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This is the old Query.as_sql() method revived: it's like Query.__str__,
but the parameters aren't substituted into the placeholders. Thus, it's
a more accurate representation of the SQL the (default) backend will
see. Entirely internal.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16655 bcc190cf-cafb-0310-a4f2-bffc1f526a37
When reporting a validation error (during model validation or fixture
loading, for example), the error messages now report the bad value as
well as the expected type. This can make identifying the offending field
and problem a bit easier.
Fixed#11595. Patch from raulcd and wildfire with supervision from
Russell.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16638 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Anssi Kääriäinen
Aymeric Augustin
Russell Keith-Magee
Andrew Godwin
Claude Paroz
orblivion
Tai Lee
Mike Johnson
Alex Gaynor
Preston Holmes
Luke Plant
Jan Bednařík
Michael Manfre
Adrien Lemaire
Carl Meyer
Malcolm Tredinnick
Mitar
Alex Gaynor
Simon Meers
Andrei Antoukh
Brendan MacDonell
Nuno Maltez
Jann Kleen
Simon Charette
Adrian Holovaty
Julien Phalip
Jannis Leidel
Karen Tracey
Ramiro Morales
Gabriel Hurley
Paul McMillan