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Fixed #7830 -- Removed all of the remaining, deprecated, non-oldforms features: 

* Support for representing files as strings was removed. Use `django.core.files.base.ContentFile` instead.
 * Support for representing uploaded files as dictionaries was removed. Use `django.core.files.uploadedfile.SimpleUploadedFile` instead.
 * The `filename`, `file_name`, `file_size`, and `chuck` properties of `UploadedFile` were removed. Use the `name`, `name`, `size`, and `chunks` properties instead, respectively.
 * The `get_FIELD_filename`, `get_FIELD_url`, `get_FIELD_size`, and `save_FIELD_file` methods for Models with `FileField` fields were removed. Instead, use the `path`, `url`, and `size` attributes and `save` method on the field itself, respectively.
 * The `get_FIELD_width` and `get_FIELD_height` methods for Models with `ImageField` fields were removed. Use the `width` and `height` attributes on the field itself instead.
 * The dispatcher `connect`, `disconnect`, `send`, and `sendExact` functions were removed. Use the signal object's own `connect`, `disconnect`, `send`, and `send` methods instead, respectively.
 * The `form_for_model` and `form_for_instance` functions were removed. Use a `ModelForm` subclass instead.
 * Support for importing `django.newforms` was removed. Use `django.forms` instead.
 * Support for importing `django.utils.images` was removed. Use `django.core.files.images` instead.
 * Support for the `follow` argument in the `create_object` and `update_object` generic views was removed. Use the `django.forms` package and the new `form_class` argument instead.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8291 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Gary Wilson Jr 2008-08-10 21:10:47 +00:00
parent 94e8f4fb35
commit ef48a3e69c
17 changed files with 81 additions and 821 deletions
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13
django/core/files/storage.py
View File

@ -36,19 +36,6 @@ class Storage(object):
Saves new content to the file specified by name. The content should be a
proper File object, ready to be read from the beginning.
"""
# Check for old-style usage. Warn here first since there are multiple
# locations where we need to support both new and old usage.
if isinstance(content, basestring):
import warnings
warnings.warn(
message = "Representing files as strings is deprecated." \
"Use django.core.files.base.ContentFile instead.",
category = DeprecationWarning,
stacklevel = 2
)
from django.core.files.base import ContentFile
content = ContentFile(content)
# Get the proper name for the file, as it will actually be saved.
if name is None:
name = content.name

65
django/core/files/uploadedfile.py
View File

@ -3,7 +3,6 @@ Classes representing uploaded files.
"""
import os
import warnings
try:
from cStringIO import StringIO
except ImportError:
@ -11,34 +10,10 @@ except ImportError:
from django.conf import settings
from django.core.files.base import File
from django.core.files import temp as tempfile
__all__ = ('UploadedFile', 'TemporaryUploadedFile', 'InMemoryUploadedFile', 'SimpleUploadedFile')
# Because we fooled around with it a bunch, UploadedFile has a bunch
# of deprecated properties. This little shortcut helps define 'em
# without too much code duplication.
def deprecated_property(old, new, readonly=False):
def issue_warning():
warnings.warn(
message = "UploadedFile.%s is deprecated; use UploadedFile.%s instead." % (old, new),
category = DeprecationWarning,
stacklevel = 3
)
def getter(self):
issue_warning()
return getattr(self, new)
def setter(self, value):
issue_warning()
setattr(self, new, value)
if readonly:
return property(getter)
else:
return property(getter, setter)
__all__ = ('UploadedFile', 'TemporaryUploadedFile', 'InMemoryUploadedFile',
'SimpleUploadedFile')
class UploadedFile(File):
"""
@ -77,21 +52,6 @@ class UploadedFile(File):
name = property(_get_name, _set_name)
# Deprecated properties
filename = deprecated_property(old="filename", new="name")
file_name = deprecated_property(old="file_name", new="name")
file_size = deprecated_property(old="file_size", new="size")
chunk = deprecated_property(old="chunk", new="chunks", readonly=True)
def _get_data(self):
warnings.warn(
message = "UploadedFile.data is deprecated; use UploadedFile.read() instead.",
category = DeprecationWarning,
stacklevel = 2
)
return self.read()
data = property(_get_data)
# Abstract methods; subclasses *must* define read() and probably should
# define open/close.
def read(self, num_bytes=None):
@ -103,27 +63,6 @@ class UploadedFile(File):
def close(self):
pass
# Backwards-compatible support for uploaded-files-as-dictionaries.
def __getitem__(self, key):
warnings.warn(
message = "The dictionary access of uploaded file objects is deprecated. Use the new object interface instead.",
category = DeprecationWarning,
stacklevel = 2
)
backwards_translate = {
'filename': 'name',
'content-type': 'content_type',
}
if key == 'content':
return self.read()
elif key == 'filename':
return self.name
elif key == 'content-type':
return self.content_type
else:
return getattr(self, key)
class TemporaryUploadedFile(UploadedFile):
"""
A file uploaded to a temporary location (i.e. stream-to-disk).

38
django/db/models/base.py
View File

@ -3,7 +3,6 @@ import types
import sys
import os
from itertools import izip
from warnings import warn
try:
set
except NameError:
@ -477,43 +476,6 @@ class Model(object):
setattr(self, cachename, obj)
return getattr(self, cachename)
def _get_FIELD_filename(self, field):
warn("instance.get_%s_filename() is deprecated. Use instance.%s.path instead." % \
(field.attname, field.attname), DeprecationWarning, stacklevel=3)
try:
return getattr(self, field.attname).path
except ValueError:
return ''
def _get_FIELD_url(self, field):
warn("instance.get_%s_url() is deprecated. Use instance.%s.url instead." % \
(field.attname, field.attname), DeprecationWarning, stacklevel=3)
try:
return getattr(self, field.attname).url
except ValueError:
return ''
def _get_FIELD_size(self, field):
warn("instance.get_%s_size() is deprecated. Use instance.%s.size instead." % \
(field.attname, field.attname), DeprecationWarning, stacklevel=3)
return getattr(self, field.attname).size
def _save_FIELD_file(self, field, filename, content, save=True):
warn("instance.save_%s_file() is deprecated. Use instance.%s.save() instead." % \
(field.attname, field.attname), DeprecationWarning, stacklevel=3)
return getattr(self, field.attname).save(filename, content, save)
_save_FIELD_file.alters_data = True
def _get_FIELD_width(self, field):
warn("instance.get_%s_width() is deprecated. Use instance.%s.width instead." % \
(field.attname, field.attname), DeprecationWarning, stacklevel=3)
return getattr(self, field.attname).width()
def _get_FIELD_height(self, field):
warn("instance.get_%s_height() is deprecated. Use instance.%s.height instead." % \
(field.attname, field.attname), DeprecationWarning, stacklevel=3)
return getattr(self, field.attname).height()
############################################

24
django/db/models/fields/files.py
View File

@ -192,10 +192,6 @@ class FileField(Field):
def contribute_to_class(self, cls, name):
super(FileField, self).contribute_to_class(cls, name)
setattr(cls, self.name, FileDescriptor(self))
setattr(cls, 'get_%s_filename' % self.name, curry(cls._get_FIELD_filename, field=self))
setattr(cls, 'get_%s_url' % self.name, curry(cls._get_FIELD_url, field=self))
setattr(cls, 'get_%s_size' % self.name, curry(cls._get_FIELD_size, field=self))
setattr(cls, 'save_%s_file' % self.name, lambda instance, name, content, save=True: instance._save_FIELD_file(self, name, content, save))
signals.post_delete.connect(self.delete_file, sender=cls)
def delete_file(self, instance, sender, **kwargs):
@ -262,17 +258,6 @@ class FileField(Field):
class ImageFieldFile(ImageFile, FieldFile):
def save(self, name, content, save=True):
if not hasattr(content, 'read'):
import warnings
warnings.warn(
message = "Representing files as strings is deprecated." \
"Use django.core.files.base.ContentFile instead.",
category = DeprecationWarning,
stacklevel = 2
)
content = ContentFile(content)
# Repopulate the image dimension cache.
self._dimensions_cache = get_image_dimensions(content)
@ -300,15 +285,6 @@ class ImageField(FileField):
def get_manipulator_field_objs(self):
return [oldforms.ImageUploadField, oldforms.HiddenField]
def contribute_to_class(self, cls, name):
super(ImageField, self).contribute_to_class(cls, name)
# Add get_BLAH_width and get_BLAH_height methods, but only if the
# image field doesn't have width and height cache fields.
if not self.width_field:
setattr(cls, 'get_%s_width' % self.name, curry(cls._get_FIELD_width, field=self))
if not self.height_field:
setattr(cls, 'get_%s_height' % self.name, curry(cls._get_FIELD_height, field=self))
def formfield(self, **kwargs):
defaults = {'form_class': forms.ImageField}
defaults.update(kwargs)

45
django/dispatch/dispatcher.py
View File

@ -1,5 +1,4 @@
import weakref
import warnings
try:
set
except NameError:
@ -197,47 +196,3 @@ class Signal(object):
for idx, (r_key, _) in enumerate(self.receivers):
if r_key == key:
del self.receivers[idx]
def connect(receiver, signal, sender=None, weak=True):
"""
For backward compatibility only. See Signal.connect()
"""
warnings.warn(
category = DeprecationWarning,
message = "dispatcher.connect() is deprecated; use Signal.connect() instead.",
stacklevel = 2
)
return signal.connect(receiver, sender, weak)
def disconnect(receiver, signal, sender=None, weak=True):
"""
For backward compatibility only. See Signal.disconnect()
"""
warnings.warn(
category = DeprecationWarning,
message = "dispatcher.disconnect() is deprecated; use Signal.disconnect() instead.",
stacklevel = 2
)
signal.disconnect(receiver, sender, weak)
def send(signal, sender=None, **named):
"""
For backward compatibility only. See Signal.send()
"""
warnings.warn(
category = DeprecationWarning,
message = "dispatcher.send() is deprecated; use Signal.send() instead.",
stacklevel = 2
)
return signal.send(sender=sender, **named)
def sendExact(signal, sender, **named ):
"""
This function is deprecated, as it now has the same meaning as send.
"""
warnings.warn(
category = DeprecationWarning,
message = "dispatcher.sendExact() is deprecated; use Signal.send() instead.",
stacklevel = 2
)
return signal.send(sender=sender, **named)

11
django/forms/fields.py
View File

@ -442,16 +442,7 @@ class FileField(Field):
elif not data and initial:
return initial
if isinstance(data, dict):
# We warn once, then support both ways below.
import warnings
warnings.warn(
message = "Representing uploaded files as dictionaries is deprecated. Use django.core.files.uploadedfile.SimpleUploadedFile instead.",
category = DeprecationWarning,
stacklevel = 2
)
data = UploadedFile(data['filename'], data['content'])
# UploadedFile objects should have name and size attributes.
try:
file_name = data.name
file_size = data.size

65
django/forms/models.py
View File

@ -3,8 +3,6 @@ Helper functions for creating Form classes from Django models
and database field objects.
"""
from warnings import warn
from django.utils.translation import ugettext_lazy as _
from django.utils.encoding import smart_unicode
from django.utils.datastructures import SortedDict
@ -18,8 +16,8 @@ from formsets import BaseFormSet, formset_factory, DELETION_FIELD_NAME
__all__ = (
'ModelForm', 'BaseModelForm', 'model_to_dict', 'fields_for_model',
'save_instance', 'form_for_model', 'form_for_instance', 'form_for_fields',
'ModelChoiceField', 'ModelMultipleChoiceField',
'save_instance', 'form_for_fields', 'ModelChoiceField',
'ModelMultipleChoiceField',
)
def save_instance(form, instance, fields=None, fail_message='saved',
@ -74,65 +72,6 @@ def make_instance_save(instance, fields, fail_message):
return save_instance(self, instance, fields, fail_message, commit)
return save
def form_for_model(model, form=BaseForm, fields=None,
formfield_callback=lambda f: f.formfield()):
"""
Returns a Form class for the given Django model class.
Provide ``form`` if you want to use a custom BaseForm subclass.
Provide ``formfield_callback`` if you want to define different logic for
determining the formfield for a given database field. It's a callable that
takes a database Field instance and returns a form Field instance.
"""
warn("form_for_model is deprecated. Use ModelForm instead.",
PendingDeprecationWarning, stacklevel=3)
opts = model._meta
field_list = []
for f in opts.fields + opts.many_to_many:
if not f.editable:
continue
if fields and not f.name in fields:
continue
formfield = formfield_callback(f)
if formfield:
field_list.append((f.name, formfield))
base_fields = SortedDict(field_list)
return type(opts.object_name + 'Form', (form,),
{'base_fields': base_fields, '_model': model,
'save': make_model_save(model, fields, 'created')})
def form_for_instance(instance, form=BaseForm, fields=None,
formfield_callback=lambda f, **kwargs: f.formfield(**kwargs)):
"""
Returns a Form class for the given Django model instance.
Provide ``form`` if you want to use a custom BaseForm subclass.
Provide ``formfield_callback`` if you want to define different logic for
determining the formfield for a given database field. It's a callable that
takes a database Field instance, plus **kwargs, and returns a form Field
instance with the given kwargs (i.e. 'initial').
"""
warn("form_for_instance is deprecated. Use ModelForm instead.",
PendingDeprecationWarning, stacklevel=3)
model = instance.__class__
opts = model._meta
field_list = []
for f in opts.fields + opts.many_to_many:
if not f.editable:
continue
if fields and not f.name in fields:
continue
current_value = f.value_from_object(instance)
formfield = formfield_callback(f, initial=current_value)
if formfield:
field_list.append((f.name, formfield))
base_fields = SortedDict(field_list)
return type(opts.object_name + 'InstanceForm', (form,),
{'base_fields': base_fields, '_model': model,
'save': make_instance_save(instance, fields, 'changed')})
def form_for_fields(field_list):
"""
Returns a Form class for the given list of Django database field instances.

7
django/newforms/__init__.py
View File

@ -1,7 +0,0 @@
import warnings
warnings.warn(
category = DeprecationWarning,
message = "django.newforms is no longer new. Import django.forms instead.",
stacklevel = 2
)
from django.forms import *

5
django/utils/images.py
View File

@ -1,5 +0,0 @@
import warnings
from django.core.files.images import get_image_dimensions
warnings.warn("django.utils.images has been moved to django.core.files.images.", DeprecationWarning)

24
django/views/generic/create_update.py
View File

@ -7,19 +7,6 @@ from django.utils.translation import ugettext
from django.contrib.auth.views import redirect_to_login
from django.views.generic import GenericViewError
def deprecate_follow(follow):
"""
Issues a DeprecationWarning if follow is anything but None.
The old Manipulator-based forms used a follow argument that is no longer
needed for newforms-based forms.
"""
if follow is not None:
import warnings
msg = ("Generic views have been changed to use newforms, and the"
" 'follow' argument is no longer used. Please update your code"
" to not use the 'follow' argument.")
warnings.warn(msg, DeprecationWarning, stacklevel=3)
def apply_extra_context(extra_context, context):
"""
@ -105,8 +92,7 @@ def lookup_object(model, object_id, slug, slug_field):
def create_object(request, model=None, template_name=None,
template_loader=loader, extra_context=None, post_save_redirect=None,
login_required=False, follow=None, context_processors=None,
form_class=None):
login_required=False, context_processors=None, form_class=None):
"""
Generic object-creation function.
@ -115,7 +101,6 @@ def create_object(request, model=None, template_name=None,
form
the form for the object
"""
deprecate_follow(follow)
if extra_context is None: extra_context = {}
if login_required and not request.user.is_authenticated():
return redirect_to_login(request.path)
@ -143,9 +128,9 @@ def create_object(request, model=None, template_name=None,
def update_object(request, model=None, object_id=None, slug=None,
slug_field='slug', template_name=None, template_loader=loader,
extra_context=None, post_save_redirect=None,
login_required=False, follow=None, context_processors=None,
template_object_name='object', form_class=None):
extra_context=None, post_save_redirect=None, login_required=False,
context_processors=None, template_object_name='object',
form_class=None):
"""
Generic object-update function.
@ -156,7 +141,6 @@ def update_object(request, model=None, object_id=None, slug=None,
object
the original object being edited
"""
deprecate_follow(follow)
if extra_context is None: extra_context = {}
if login_required and not request.user.is_authenticated():
return redirect_to_login(request.path)

3
docs/custom_model_fields.txt
View File

@ -483,8 +483,7 @@ accepted lookup types to ``exact`` and ``in``::
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Returns the default form field to use when this field is displayed
in a model. This method is called by the `helper functions`_
``form_for_model()`` and ``form_for_instance()``.
in a model.
All of the ``kwargs`` dictionary is passed directly to the form field's
``__init__()`` method. Normally, all you need to do is set up a good default

31
docs/db-api.txt
View File

@ -2313,37 +2313,6 @@ For a full example, see the `lookup API sample model`_.
.. _lookup API sample model: ../models/lookup/
get_FOO_filename()
------------------
**Deprecated in Django development version**; use ``object.FOO.name`` instead.
See `managing files`_ for details.
get_FOO_url()
-------------
**Deprecated in Django development version**; use ``object.FOO.url`` instead.
See `managing files`_ for details.
get_FOO_size()
--------------
**Deprecated in Django development version**; use ``object.FOO.size`` instead.
See `managing files`_ for details.
save_FOO_file(filename, raw_contents)
-------------------------------------
**Deprecated in Django development version**; use ``object.FOO.save()`` instead.
See `managing files`_ for details.
get_FOO_height() and get_FOO_width()
------------------------------------
**Deprecated in Django development version**; use ``object.FOO.width`` and
``object.FOO.height`` instead. See `managing files`_ for details.
.. _`managing files`: ../files/
Shortcuts
=========

425
docs/form_for_model.txt
View File

@ -1,425 +0,0 @@
Generating forms for models
===========================
.. admonition:: Note
The APIs described in this document have been deprecated. If you're
developing new code, use `ModelForms`_ instead.
.. _ModelForms: ../modelforms/
If you're building a database-driven app, chances are you'll have forms that
map closely to Django models. For instance, you might have a ``BlogComment``
model, and you want to create a form that lets people submit comments. In this
case, it would be redundant to define the field types in your form, because
you've already defined the fields in your model.
For this reason, Django provides a few helper functions that let you create a
``Form`` class from a Django model.
``form_for_model()``
--------------------
The method ``django.forms.form_for_model()`` creates a form based on the
definition of a specific model. Pass it the model class, and it will return a
``Form`` class that contains a form field for each model field.
For example::
>>> from django.forms import form_for_model
# Create the form class.
>>> ArticleForm = form_for_model(Article)
# Create an empty form instance.
>>> f = ArticleForm()
It bears repeating that ``form_for_model()`` takes the model *class*, not a
model instance, and it returns a ``Form`` *class*, not a ``Form`` instance.
Field types
~~~~~~~~~~~
The generated ``Form`` class will have a form field for every model field. Each
model field has a corresponding default form field. For example, a
``CharField`` on a model is represented as a ``CharField`` on a form. A
model ``ManyToManyField`` is represented as a ``MultipleChoiceField``. Here is
the full list of conversions:
=============================== ========================================
Model field Form field
=============================== ========================================
``AutoField`` Not represented in the form
``BooleanField`` ``BooleanField``
``CharField`` ``CharField`` with ``max_length`` set to
the model field's ``max_length``
``CommaSeparatedIntegerField`` ``CharField``
``DateField`` ``DateField``
``DateTimeField`` ``DateTimeField``
``DecimalField`` ``DecimalField``
``EmailField`` ``EmailField``
``FileField`` ``FileField``
``FilePathField`` ``CharField``
``FloatField`` ``FloatField``
``ForeignKey`` ``ModelChoiceField`` (see below)
``ImageField`` ``ImageField``
``IntegerField`` ``IntegerField``
``IPAddressField`` ``IPAddressField``
``ManyToManyField`` ``ModelMultipleChoiceField`` (see
below)
``NullBooleanField`` ``CharField``
``PhoneNumberField`` ``USPhoneNumberField``
(from ``django.contrib.localflavor.us``)
``PositiveIntegerField`` ``IntegerField``
``PositiveSmallIntegerField`` ``IntegerField``
``SlugField`` ``CharField``
``SmallIntegerField`` ``IntegerField``
``TextField`` ``CharField`` with ``widget=Textarea``
``TimeField`` ``TimeField``
``URLField`` ``URLField`` with ``verify_exists`` set
to the model field's ``verify_exists``
``USStateField`` ``CharField`` with
``widget=USStateSelect``
(``USStateSelect`` is from
``django.contrib.localflavor.us``)
``XMLField`` ``CharField`` with ``widget=Textarea``
=============================== ========================================
.. note::
The ``FloatField`` form field and ``DecimalField`` model and form fields
are new in the development version.
As you might expect, the ``ForeignKey`` and ``ManyToManyField`` model field
types are special cases:
* ``ForeignKey`` is represented by ``django.forms.ModelChoiceField``,
which is a ``ChoiceField`` whose choices are a model ``QuerySet``.
* ``ManyToManyField`` is represented by
``django.forms.ModelMultipleChoiceField``, which is a
``MultipleChoiceField`` whose choices are a model ``QuerySet``.
In addition, each generated form field has attributes set as follows:
* If the model field has ``blank=True``, then ``required`` is set to
``False`` on the form field. Otherwise, ``required=True``.
* The form field's ``label`` is set to the ``verbose_name`` of the model
field, with the first character capitalized.
* The form field's ``help_text`` is set to the ``help_text`` of the model
field.
* If the model field has ``choices`` set, then the form field's ``widget``
will be set to ``Select``, with choices coming from the model field's
``choices``. The choices will normally include the blank choice which is
selected by default. If the field is required, this forces the user to
make a selection. The blank choice will not be included if the model
field has ``blank=False`` and an explicit ``default`` value (the
``default`` value will be initially selected instead).
Finally, note that you can override the form field used for a given model
field. See "Overriding the default field types" below.
A full example
~~~~~~~~~~~~~~
Consider this set of models::
from django.db import models
TITLE_CHOICES = (
('MR', 'Mr.'),
('MRS', 'Mrs.'),
('MS', 'Ms.'),
)
class Author(models.Model):
name = models.CharField(max_length=100)
title = models.CharField(max_length=3, choices=TITLE_CHOICES)
birth_date = models.DateField(blank=True, null=True)
def __unicode__(self):
return self.name
class Book(models.Model):
name = models.CharField(max_length=100)
authors = models.ManyToManyField(Author)
With these models, a call to ``form_for_model(Author)`` would return a ``Form``
class equivalent to this::
class AuthorForm(forms.Form):
name = forms.CharField(max_length=100)
title = forms.CharField(max_length=3,
widget=forms.Select(choices=TITLE_CHOICES))
birth_date = forms.DateField(required=False)
A call to ``form_for_model(Book)`` would return a ``Form`` class equivalent to
this::
class BookForm(forms.Form):
name = forms.CharField(max_length=100)
authors = forms.ModelMultipleChoiceField(queryset=Author.objects.all())
The ``save()`` method
~~~~~~~~~~~~~~~~~~~~~
Every form produced by ``form_for_model()`` also has a ``save()`` method. This
method creates and saves a database object from the data bound to the form. For
example::
# Create a form instance from POST data.
>>> f = ArticleForm(request.POST)
# Save a new Article object from the form's data.
>>> new_article = f.save()
Note that ``save()`` will raise a ``ValueError`` if the data in the form
doesn't validate -- i.e., ``if form.errors``.
This ``save()`` method accepts an optional ``commit`` keyword argument, which
accepts either ``True`` or ``False``. If you call ``save()`` with
``commit=False``, then it will return an object that hasn't yet been saved to
the database. In this case, it's up to you to call ``save()`` on the resulting
model instance. This is useful if you want to do custom processing on the
object before saving it. ``commit`` is ``True`` by default.
Another side effect of using ``commit=False`` is seen when your model has
a many-to-many relation with another model. If your model has a many-to-many
relation and you specify ``commit=False`` when you save a form, Django cannot
immediately save the form data for the many-to-many relation. This is because
it isn't possible to save many-to-many data for an instance until the instance
exists in the database.
To work around this problem, every time you save a form using ``commit=False``,
Django adds a ``save_m2m()`` method to the form created by ``form_for_model``.
After you've manually saved the instance produced by the form, you can invoke
``save_m2m()`` to save the many-to-many form data. For example::
# Create a form instance with POST data.
>>> f = AuthorForm(request.POST)
# Create, but don't save the new author instance.
>>> new_author = f.save(commit=False)
# Modify the author in some way.
>>> new_author.some_field = 'some_value'
# Save the new instance.
>>> new_author.save()
# Now, save the many-to-many data for the form.
>>> f.save_m2m()
Calling ``save_m2m()`` is only required if you use ``save(commit=False)``.
When you use a simple ``save()`` on a form, all data -- including
many-to-many data -- is saved without the need for any additional method calls.
For example::
# Create a form instance with POST data.
>>> f = AuthorForm(request.POST)
# Create and save the new author instance. There's no need to do anything else.
>>> new_author = f.save()
Using an alternate base class
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
If you want to add custom methods to the form generated by
``form_for_model()``, write a class that extends ``django.forms.BaseForm``
and contains your custom methods. Then, use the ``form`` argument to
``form_for_model()`` to tell it to use your custom form as its base class.
For example::
# Create the new base class.
>>> class MyBase(BaseForm):
... def my_method(self):
... # Do whatever the method does
# Create the form class with a different base class.
>>> ArticleForm = form_for_model(Article, form=MyBase)
# Instantiate the form.
>>> f = ArticleForm()
# Use the base class method.
>>> f.my_method()
Using a subset of fields on the form
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
**New in Django development version**
In some cases, you may not want all the model fields to appear on the generated
form. There are two ways of telling ``form_for_model()`` to use only a subset
of the model fields:
1. Set ``editable=False`` on the model field. As a result, *any* form
created from the model via ``form_for_model()`` will not include that
field.
2. Use the ``fields`` argument to ``form_for_model()``. This argument, if
given, should be a list of field names to include in the form.
For example, if you want a form for the ``Author`` model (defined above)
that includes only the ``name`` and ``title`` fields, you would specify
``fields`` like this::
PartialArticleForm = form_for_model(Author, fields=('name', 'title'))
.. note::
If you specify ``fields`` when creating a form with ``form_for_model()``,
then the fields that are *not* specified will not be set by the form's
``save()`` method. Django will prevent any attempt to save an incomplete
model, so if the model does not allow the missing fields to be empty, and
does not provide a default value for the missing fields, any attempt to
``save()`` a ``form_for_model`` with missing fields will fail. To avoid
this failure, you must use ``save(commit=False)`` and manually set any
extra required fields::
instance = form.save(commit=False)
instance.required_field = 'new value'
instance.save()
See the `section on saving forms`_ for more details on using
``save(commit=False)``.
.. _section on saving forms: `The save() method`_
Overriding the default field types
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The default field types, as described in the "Field types" table above, are
sensible defaults; if you have a ``DateField`` in your model, chances are you'd
want that to be represented as a ``DateField`` in your form. But
``form_for_model()`` gives you the flexibility of changing the form field type
for a given model field. You do this by specifying a **formfield callback**.
A formfield callback is a function that, when provided with a model field,
returns a form field instance. When constructing a form, ``form_for_model()``
asks the formfield callback to provide form field types.
By default, ``form_for_model()`` calls the ``formfield()`` method on the model
field::
def default_callback(field, **kwargs):
return field.formfield(**kwargs)
The ``kwargs`` are any keyword arguments that might be passed to the form
field, such as ``required=True`` or ``label='Foo'``.
For example, if you wanted to use ``MyDateFormField`` for any ``DateField``
field on the model, you could define the callback::
>>> def my_callback(field, **kwargs):
... if isinstance(field, models.DateField):
... return MyDateFormField(**kwargs)
... else:
... return field.formfield(**kwargs)
>>> ArticleForm = form_for_model(Article, formfield_callback=my_callback)
Note that your callback needs to handle *all* possible model field types, not
just the ones that you want to behave differently to the default. That's why
this example has an ``else`` clause that implements the default behavior.
.. warning::
The field that is passed into the ``formfield_callback`` function in
``form_for_model()`` and ``form_for_instance`` is the field instance from
your model's class. You **must not** alter that object at all; treat it
as read-only!
If you make any alterations to that object, it will affect any future
users of the model class, because you will have changed the field object
used to construct the class. This is almost certainly what you don't want
to have happen.
Finding the model associated with a form
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The model class that was used to construct the form is available
using the ``_model`` property of the generated form::
>>> ArticleForm = form_for_model(Article)
>>> ArticleForm._model
<class 'myapp.models.Article'>
``form_for_instance()``
-----------------------
``form_for_instance()`` is like ``form_for_model()``, but it takes a model
instance instead of a model class::
# Create an Author.
>>> a = Author(name='Joe Smith', title='MR', birth_date=None)
>>> a.save()
# Create a form for this particular Author.
>>> AuthorForm = form_for_instance(a)
# Instantiate the form.
>>> f = AuthorForm()
When a form created by ``form_for_instance()`` is created, the initial data
values for the form fields are drawn from the instance. However, this data is
not bound to the form. You will need to bind data to the form before the form
can be saved.
Unlike ``form_for_model()``, a choice field in form created by
``form_for_instance()`` will not include the blank choice if the respective
model field has ``blank=False``. The initial choice is drawn from the instance.
When you call ``save()`` on a form created by ``form_for_instance()``,
the database instance will be updated. As in ``form_for_model()``, ``save()``
will raise ``ValueError`` if the data doesn't validate.
``form_for_instance()`` has ``form``, ``fields`` and ``formfield_callback``
arguments that behave the same way as they do for ``form_for_model()``.
Let's modify the earlier `contact form`_ view example a little bit. Suppose we
have a ``Message`` model that holds each contact submission. Something like::
class Message(models.Model):
subject = models.CharField(max_length=100)
message = models.TextField()
sender = models.EmailField()
cc_myself = models.BooleanField(required=False)
You could use this model to create a form (using ``form_for_model()``). You
could also use existing ``Message`` instances to create a form for editing
messages. The `simple example view`_ can be changed slightly to accept the ``id`` value
of an existing ``Message`` and present it for editing::
def contact_edit(request, msg_id):
# Create the form from the message id.
message = get_object_or_404(Message, id=msg_id)
ContactForm = form_for_instance(message)
if request.method == 'POST':
form = ContactForm(request.POST)
if form.is_valid():
form.save()
return HttpResponseRedirect('/url/on_success/')
else:
form = ContactForm()
return render_to_response('contact.html', {'form': form})
Aside from how we create the ``ContactForm`` class here, the main point to
note is that the form display in the ``GET`` branch of the function
will use the values from the ``message`` instance as initial values for the
form field.
.. _contact form: ../forms/#simple-view-example
.. _`simple example view`: ../forms/#simple-view-example
When should you use ``form_for_model()`` and ``form_for_instance()``?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The ``form_for_model()`` and ``form_for_instance()`` functions are meant to be
shortcuts for the common case. If you want to create a form whose fields map to
more than one model, or a form that contains fields that *aren't* on a model,
you shouldn't use these shortcuts. Creating a ``Form`` class the "long" way
isn't that difficult, after all.

4
docs/forms.txt
View File

@ -1828,11 +1828,7 @@ Generating forms for models
The prefered way of generating forms that work with models is explained in the
`ModelForms documentation`_.
Looking for the ``form_for_model`` and ``form_for_instance`` documentation?
They've been deprecated, but you can still `view the documentation`_.
.. _ModelForms documentation: ../modelforms/
.. _view the documentation: ../form_for_model/
Media
=====

19
docs/model-api.txt
View File

@ -308,12 +308,11 @@ For example, say your ``MEDIA_ROOT`` is set to ``'/home/media'``, and
upload a file on Jan. 15, 2007, it will be saved in the directory
``/home/media/photos/2007/01/15``.
If you want to retrieve the upload file's on-disk filename, or a URL that
refers to that file, or the file's size, you can use the
``get_FOO_filename()``, ``get_FOO_url()`` and ``get_FOO_size()`` methods.
They are all documented here__.
Information about the uploaded ``File`` object, such as its on-disk filename,
its size, or its URL, is available via attributes on the object itself. See the
`managing files`__ documentation for more information about ``File`` objects.
__ ../db-api/#get-foo-filename
__ ../files/
Note that whenever you deal with uploaded files, you should pay close attention
to where you're uploading them and what type of files they are, to avoid
@ -392,19 +391,17 @@ image. Has two extra optional arguments, ``height_field`` and
``width_field``, which, if set, will be auto-populated with the height and
width of the image each time a model instance is saved.
In addition to the special ``get_FOO_*`` methods that are available for
``FileField``, an ``ImageField`` also has ``get_FOO_height()`` and
``get_FOO_width()`` methods. These are documented elsewhere_.
In addition to the `standard attributes and methods`_ that are available for
``FileField``, an ``ImageField`` also has ``width`` and ``height`` attributes.
Requires the `Python Imaging Library`_.
.. _Python Imaging Library: http://www.pythonware.com/products/pil/
.. _elsewhere: ../db-api/#get-foo-height-and-get-foo-width
**New in development version:** By default, ``ImageField`` instances are
created as ``varchar(100)`` columns in your database. As with other fields, you
can change the maximum length using the ``max_length`` argument.
.. _standard attributes and methods: ../files/#file-attributes-and-methods
.. _Python Imaging Library: http://www.pythonware.com/products/pil/
``IntegerField``
~~~~~~~~~~~~~~~~

5
tests/modeltests/model_forms/models.py
View File

@ -363,9 +363,8 @@ from the form can't provide a value for that field!
<tr><th>Headline:</th><td><input type="text" name="headline" maxlength="50" /></td></tr>
<tr><th>Pub date:</th><td><input type="text" name="pub_date" /></td></tr>
Use form_for_instance to create a Form from a model instance. The difference
between this Form and one created via form_for_model is that the object's
current values are inserted as 'initial' data in each Field.
When the ModelForm is passed an instance, that instance's current values are
inserted as 'initial' data in each Field.
>>> w = Writer.objects.get(name='Mike Royko')
>>> class RoykoForm(ModelForm):
... class Meta:

22
tests/regressiontests/forms/models.py
View File

@ -25,7 +25,7 @@ class FileForm(django_forms.Form):
file1 = django_forms.FileField()
__test__ = {'API_TESTS': """
>>> from django.forms import form_for_model, form_for_instance
>>> from django.forms.models import ModelForm
>>> from django.core.files.uploadedfile import SimpleUploadedFile
# FileModel with unicode filename and data #########################
@ -37,7 +37,9 @@ True
>>> m = FileModel.objects.create(file=f.cleaned_data['file1'])
# Boundary conditions on a PostitiveIntegerField #########################
>>> BoundaryForm = form_for_model(BoundaryModel)
>>> class BoundaryForm(ModelForm):
... class Meta:
... model = BoundaryModel
>>> f = BoundaryForm({'positive_integer': 100})
>>> f.is_valid()
True
@ -51,7 +53,9 @@ False
# Formfield initial values ########
If the model has default values for some fields, they are used as the formfield
initial values.
>>> DefaultsForm = form_for_model(Defaults)
>>> class DefaultsForm(ModelForm):
... class Meta:
... model = Defaults
>>> DefaultsForm().fields['name'].initial
u'class default value'
>>> DefaultsForm().fields['def_date'].initial
@ -59,14 +63,14 @@ datetime.date(1980, 1, 1)
>>> DefaultsForm().fields['value'].initial
42
In form_for_instance(), the initial values come from the instance's values, not
the model's defaults.
In a ModelForm that is passed an instance, the initial values come from the
instance's values, not the model's defaults.
>>> foo_instance = Defaults(name=u'instance value', def_date=datetime.date(1969, 4, 4), value=12)
>>> InstanceForm = form_for_instance(foo_instance)
>>> InstanceForm().fields['name'].initial
>>> instance_form = DefaultsForm(instance=foo_instance)
>>> instance_form.initial['name']
u'instance value'
>>> InstanceForm().fields['def_date'].initial
>>> instance_form.initial['def_date']
datetime.date(1969, 4, 4)
>>> InstanceForm().fields['value'].initial
>>> instance_form.initial['value']
12
"""}