The option can be used to force pre 1.6 style SELECT on save behaviour.
This is needed in case the database returns zero updated rows even if
there is a matching row in the DB. One such case is PostgreSQL update
trigger that returns NULL.
Reviewed by Tim Graham.
Refs #16649
The __eq__ method now considers two instances without primary key value
equal only when they have same id(). The __hash__ method raises
TypeError for no primary key case.
Fixed#18864, fixed#18250
Thanks to Tim Graham for docs review.
Although the ModelForm validation code was changed to call
Model.full_clean(), the documentation still said otherwise. The
offending phrase was removed.
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)
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 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.
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
This applies to both our own [test] code and documentation examples. Also:
* Moved the functions and handlers from `django.conf.urls.defaults` up to
`django.conf.urls` deprecating the former module.
* Added documentation for `handler403`.
* Tweaked the URLs topic document a bit.
Thanks to pupeno and cdestigter for their great work contributing patches.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16818 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
Part 2 of the model instance documentation changes. Slightly tidied up
get_absolute_url() and @permalink documentation to collapse some of the
earlier versions into a preferred learning order. I'm still not
amazingly happy with this, but larger rewrites are needed to the URLconf
stuff across a few files before I can get it into the most natural
order, I suspect. That's a slightly longer-term project.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16702 bcc190cf-cafb-0310-a4f2-bffc1f526a37
