Commit Graph

1587 Commits

Author SHA1 Message Date
Anssi Kääriäinen f403653cf1 Fixed #19635 -- Made fields pickleable 2013-03-17 15:32:50 +02:00
Aymeric Augustin 3beabb5afd Merge pull request #902 from evildmp/BLANK_CHOICE_NONE
Fixed #20043 -- Removed unused BLANK_CHOICE_NONE
2013-03-17 03:15:49 -07:00
Anssi Kääriäinen 6b4834952d Fixed #16649 -- Refactored save_base logic
Model.save() will use UPDATE - if not updated - INSERT instead of
SELECT - if found UPDATE else INSERT. This should save a query when
updating, but will cost a little when inserting model with PK set.

Also fixed #17341 -- made sure .save() commits transactions only after
the whole model has been saved. This wasn't the case in model
inheritance situations.

The save_base implementation was refactored into multiple methods.
A typical chain for inherited save is:
save_base()
    _save_parents(self)
        for each parent:
            _save_parents(parent)
            _save_table(parent)
    _save_table(self)
2013-03-14 11:01:47 +02:00
Daniele Procida a4c9a4a5fe removed unused BLANK_CHOICE_NONE 2013-03-13 21:26:15 +00:00
Aymeric Augustin 93af822c00 Improved recovery when the connection is closed in an atomic block. 2013-03-13 15:17:40 +01:00
Aymeric Augustin 83a416f5e7 Made atomic usable when autocommit is off.
Thanks Anssi for haggling until I implemented this.

This change alleviates the need for atomic_if_autocommit. When
autocommit is disabled for a database, atomic will simply create and
release savepoints, and not commit anything. This honors the contract of
not doing any transaction management.

This change also makes the hack to allow using atomic within the legacy
transaction management redundant.

None of the above will work with SQLite, because of a flaw in the design
of the sqlite3 library. This is a known limitation that cannot be lifted
without unacceptable side effects eg. triggering arbitrary commits.
2013-03-13 15:17:40 +01:00
Anssi Kääriäinen d3f00bd570 Refactored qs.add_q() and utils/tree.py
The sql/query.py add_q method did a lot of where/having tree hacking to
get complex queries to work correctly. The logic was refactored so that
it should be simpler to understand. The new logic should also produce
leaner WHERE conditions.

The changes cascade somewhat, as some other parts of Django (like
add_filter() and WhereNode) expect boolean trees in certain format or
they fail to work. So to fix the add_q() one must fix utils/tree.py,
some things in add_filter(), WhereNode and so on.

This commit also fixed add_filter to see negate clauses up the path.
A query like .exclude(Q(reversefk__in=a_list)) didn't work similarly to
.filter(~Q(reversefk__in=a_list)). The reason for this is that only
the immediate parent negate clauses were seen by add_filter, and thus a
tree like AND: (NOT AND: (AND: condition)) will not be handled
correctly, as there is one intermediary AND node in the tree. The
example tree is generated by .exclude(~Q(reversefk__in=a_list)).

Still, aggregation lost connectors in OR cases, and F() objects and
aggregates in same filter clause caused GROUP BY problems on some
databases.

Fixed #17600, fixed #13198, fixed #17025, fixed #17000, fixed #11293.
2013-03-13 10:44:49 +02:00
Anssi Kääriäinen d744c550d5 Fixed #19964 -- Removed relabel_aliases from some structs
Before there was need to have both .relabel_aliases() and .clone() for
many structs. Now there is only relabeled_clone() for those structs
where alias is the only mutable attribute.
2013-03-12 21:33:47 +02:00
Aymeric Augustin 885d98d24a Fixed #20028 -- Made atomic usable on callable instances.
Thanks Anssi for the report.
2013-03-12 10:52:16 +01:00
Simon Charette bc7a10299f Fixed #20010 -- Make sure `last_executed_query` contains it's associated parameters on Oracle.
Also removed some unused imports.
2013-03-11 17:30:23 -04:00
Aymeric Augustin f2f98abb95 Avoided closing the database connection within a transaction.
Refs #9437.
2013-03-11 21:08:49 +01:00
Aymeric Augustin e654180ce2 Improved the API of set_autocommit. 2013-03-11 15:10:58 +01:00
Aymeric Augustin 4dbd1b2dd8 Used commit_on_success_unless_managed to make ORM operations atomic. 2013-03-11 15:05:05 +01:00
Aymeric Augustin 423c0d5e29 Added a safety net for developers messing with autocommit. 2013-03-11 15:05:04 +01:00
Aymeric Augustin 107d9b1d97 Added an option to disable the creation of savepoints in atomic. 2013-03-11 15:05:04 +01:00
Aymeric Augustin 557e404127 Re-ordered functions by deprecation status. 2013-03-11 15:04:10 +01:00
Aymeric Augustin ac37ed21b3 Deprecated TransactionMiddleware and TRANSACTIONS_MANAGED.
Replaced them with per-database options, for proper multi-db support.

Also toned down the recommendation to tie transactions to HTTP requests.
Thanks Jeremy for sharing his experience.
2013-03-11 15:04:05 +01:00
Aymeric Augustin f7245b83bb Implemented atomic_if_autocommit.
It disables transaction management entirely when AUTOCOMMIT is False.
2013-03-11 14:48:55 +01:00
Aymeric Augustin 09ba70f9f1 Made transaction management work even before the first SQL query.
Thanks Florian again.
2013-03-11 14:48:55 +01:00
Aymeric Augustin 7c46c8d5f2 Added some assertions to enforce the atomicity of atomic. 2013-03-11 14:48:55 +01:00
Aymeric Augustin d7bc4fbc94 Implemented an 'atomic' decorator and context manager.
Currently it only works in autocommit mode.

Based on @xact by Christophe Pettus.
2013-03-11 14:48:55 +01:00
Aymeric Augustin 4b31a6a9e6 Added support for savepoints in SQLite.
Technically speaking they aren't usable yet.
2013-03-11 14:48:55 +01:00
Aymeric Augustin e264f67174 Refactored implementation of savepoints.
Prepared for using savepoints within transactions in autocommit mode.
2013-03-11 14:48:55 +01:00
Aymeric Augustin 918f44e3ae Moved standard SQL for savepoints in the base backend.
These methods are only called when uses_savepoints = True anyway.
2013-03-11 14:48:54 +01:00
Aymeric Augustin 3bdc7a6a70 Deprecated transaction.is_managed().
It's synchronized with the autocommit flag.
2013-03-11 14:48:54 +01:00
Aymeric Augustin ba5138b1c0 Deprecated transaction.commit/rollback_unless_managed.
Since "unless managed" now means "if database-level autocommit",
committing or rolling back doesn't have any effect.

Restored transactional integrity in a few places that relied on
automatically-started transactions with a transitory API.
2013-03-11 14:48:54 +01:00
Aymeric Augustin 14aa563f51 Removed superfluous code now that connections use autocommit by default. 2013-03-11 14:48:54 +01:00
Aymeric Augustin 5e27debc5c Enabled database-level autocommit for all backends.
This is mostly a documentation change.

It has the same backwards-incompatibility consequences as those
described for PostgreSQL in a previous commit.
2013-03-11 14:48:54 +01:00
Aymeric Augustin cfc114e00e Removed _enter/_leave_transaction_management.
The goal is to make all databases share a common, autocommit-based,
implementation.
2013-03-11 14:48:54 +01:00
Aymeric Augustin 1617557ae3 Added BaseDatabaseWrapper.ensure_connection.
This API is useful because autocommit cannot be managed without an open
connection.
2013-03-11 14:48:54 +01:00
Aymeric Augustin 7b4815b455 Expressed the dirty flag handling logic in terms of autocommit. 2013-03-11 14:48:54 +01:00
Aymeric Augustin cd364efa00 Stopped flipping the uses_savepoints feature at runtime. 2013-03-11 14:48:54 +01:00
Aymeric Augustin af9e9386eb Enabled autocommit for PostgreSQL.
For users who didn't activate autocommit in their database options, this
is backwards-incompatible in "non-managed" aka "auto" transaction state.
This state now uses database-level autocommit instead of ORM-level
autocommit.

Also removed the uses_autocommit feature which lost its purpose.
2013-03-11 14:48:54 +01:00
Aymeric Augustin 8717b0668c Separated autocommit and isolation level handling for PostgreSQL.
Autocommit cannot be manipulated independently from an open connection.
This commit introduces a minor change in behavior: entering transaction
management forces opening a databasse connection. This shouldn't be
backwards incompatible in any practical use case.
2013-03-11 14:48:54 +01:00
Aymeric Augustin f515619494 Added an API to control database-level autocommit. 2013-03-11 14:48:53 +01:00
Aymeric Augustin 7aacde84f2 Made transaction.managed a no-op and deprecated it.
enter_transaction_management() was nearly always followed by managed().

In three places it wasn't, but they will all be refactored eventually.
The "forced" keyword argument avoids introducing behavior changes until
then.

This is mostly backwards-compatible, except, of course, for managed
itself. There's a minor difference in _enter_transaction_management:
the top self.transaction_state now contains the new 'managed' state
rather than the previous one. Django doesn't access
self.transaction_state in _enter_transaction_management.
2013-03-11 14:48:53 +01:00
Florian Apolloner 8aefd30379 Fixed BinaryField support on Oracle. 2013-03-09 23:39:14 +01:00
Loic Bistuer 6983a1a540 Fixed #15363 -- Renamed and normalized to `get_queryset` the methods that return a QuerySet. 2013-03-08 10:11:45 -05:00
Alex Gaynor bbbd698c7a Added a ManyToManyField(db_constraint=False) option, this allows not creating constraints on the intermediary models. 2013-03-07 11:24:51 -08:00
Aymeric Augustin 25ce177e66 Added missing method in the dummy database backend. 2013-03-07 14:53:52 +01:00
Claude Paroz 2add24cc2c One more EMPTY_VALUES replacement following 22be90dd17
Thanks Loic Bistuer for catching this omission. Refs #19989.
2013-03-06 17:00:46 +01:00
Claude Paroz 22be90dd17 Fixed #19989 -- Suppressed UnicodeWarning during BinaryField validation
Thanks Aymeric Augustin for the report and Simon Charette for the
review.
2013-03-06 08:30:23 +01:00
Aymeric Augustin e0449316eb Fixed #18130 -- Made the isolation level configurable on PostgreSQL.
Thanks limscoder for the report and niwi for the draft patch.
2013-03-02 15:05:49 +01:00
Aymeric Augustin d63e55039d Reordered methods in database wrappers.
* Grouped related methods together -- with banner comments :/
* Described which methods are intended to be implemented in backends.
* Added docstrings.
* Used the same order in all wrappers.
2013-03-02 13:33:17 +01:00
Claude Paroz c5a25c2771 Add introspection support for BinaryField 2013-03-02 10:29:03 +01:00
Claude Paroz d680a3f447 Added support for serializing BinaryField 2013-03-02 10:29:02 +01:00
Claude Paroz 8ee1eddb7e Add a BinaryField model field
Thanks Michael Jung, Charl Botha and Florian Apolloner for review
and help on the patch.
2013-03-02 10:29:02 +01:00
Aymeric Augustin 203c17c21e Added import forgotten in 2ee21d9.
Thanks ratsonale for spotting this mistake.
2013-03-01 23:46:53 +01:00
Aymeric Augustin 0c82b1dfc4 Fixed #19929 -- Improved error when MySQL doesn't have TZ definitions.
Thanks tomas_00 for the report.
2013-02-28 17:35:13 +01:00
Aymeric Augustin cf30469164 Fixed tests broken in 2ee21d9. 2013-02-28 17:08:16 +01:00