This also updates all dependent functionality, including modelform_factory
and modelformset_factory, and the generic views `ModelFormMixin`,
`CreateView` and `UpdateView` which gain a new `fields` attribute.
This is provided as a new "validate_max" formset_factory option defaulting to
False, since the non-validating behavior of max_num is longstanding, and there
is certainly code relying on it. (In fact, even the Django admin relies on it
for the case where there are more existing inlines than the given max_num). It
may be that at some point we want to deprecate validate_max=False and
eventually remove the option, but this commit takes no steps in that direction.
This also fixes the DoS-prevention absolute_max enforcement so that it causes a
form validation error rather than an IndexError, and ensures that absolute_max
is always 1000 more than max_num, to prevent surprising changes in behavior
with max_num close to absolute_max.
Lastly, this commit fixes the previous inconsistency between a regular formset
and a model formset in the precedence of max_num and initial data. Previously
in a regular formset, if the provided initial data was longer than max_num, it
was truncated; in a model formset, all initial forms would be displayed
regardless of max_num. Now regular formsets are the same as model formsets; all
initial forms are displayed, even if more than max_num. (But if validate_max is
True, submitting these forms will result in a "too many forms" validation
error!) This combination of behaviors was chosen to keep the max_num validation
simple and consistent, and avoid silent data loss due to truncation of initial
data.
Thanks to Preston for discussion of the design choices.
When calling model_to_dict, improve performance of the generated SQL by
using values_list to determine primary keys of many to many objects. Add
a specific test for this function, test_model_to_dict_many_to_many
Thanks to brian for the original report and suggested fix.
In Python 3, the str type has an __iter__ attribute. Therefore, the
presence of an __iter__ attribute is not sufficient to distinguish
'standard' iterables (list, tuple) from strings.
* 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.
cleaned_data is no longer deleted when form validation fails but only
contains the data that did validate.
Thanks to the various contributors to this patch (see ticket).
This make them consistent with the similar capability of regular
formsets. Thanks to simon29 form the report and to Claude Paroz for the
patch.
Fixes#14574.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@17373 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Erik Romijn
Luke Plant
Claude Paroz
Baptiste Mispelon
Anssi Kääriäinen
Andrew Gorcester
Loic Bistuer
Klaas van Schelven
Simon Charette
Nick Sandford
Tim Graham
Aymeric Augustin
Patryk Zawadzki
Anton I. Sipos
Stephen Burrows
Piet Delport
Jannis Leidel
Ramiro Morales
Alex Gaynor
Russell Keith-Magee
Carl Meyer
Adrian Holovaty