mirrors/django
1
0
Fork 0
mirror of https://github.com/django/django.git synced 2025-09-26 20:19:16 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 3

Fixed #3132 -- Added prefix support for newforms. Thanks, jkocherhans

Browse source 
git-svn-id: http://code.djangoproject.com/svn/django/trunk@4194 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty 2006-12-12 05:55:39 +00:00
parent 5467c34b0b
commit faaec9c28f
2 changed files with 98 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

85
tests/regressiontests/forms/tests.py
View file

@ -1924,6 +1924,91 @@ underscores converted to spaces, and the initial letter capitalized.
<li>Password1: <input type="password" name="password1" /></li>
<li>Password (again): <input type="password" name="password2" /></li>
# Forms with prefixes #########################################################
Sometimes it's necessary to have multiple forms display on the same HTML page,
or multiple copies of the same form. We can accomplish this with form prefixes.
Pass the keyword argument 'prefix' to the Form constructor to use this feature.
This value will be prepended to each HTML form field name. One way to think
about this is "namespaces for HTML forms". Notice that in the data argument,
each field's key has the prefix, in this case 'person1', prepended to the
actual field name.
>>> class Person(Form):
... first_name = CharField()
... last_name = CharField()
... birthday = DateField()
>>> data = {
... 'person1-first_name': u'John',
... 'person1-last_name': u'Lennon',
... 'person1-birthday': u'1940-10-9'
... }
>>> p = Person(data, prefix='person1')
>>> print p.as_ul()
<li><label for="id_person1-first_name">First name:</label> <input type="text" name="person1-first_name" value="John" id="id_person1-first_name" /></li>
<li><label for="id_person1-last_name">Last name:</label> <input type="text" name="person1-last_name" value="Lennon" id="id_person1-last_name" /></li>
<li><label for="id_person1-birthday">Birthday:</label> <input type="text" name="person1-birthday" value="1940-10-9" id="id_person1-birthday" /></li>
>>> print p['first_name']
<input type="text" name="person1-first_name" value="John" id="id_person1-first_name" />
>>> print p['last_name']
<input type="text" name="person1-last_name" value="Lennon" id="id_person1-last_name" />
>>> print p['birthday']
<input type="text" name="person1-birthday" value="1940-10-9" id="id_person1-birthday" />
>>> p.errors
{}
>>> p.is_valid()
True
This is pretty unremarkable in and of itself, but let's create some data that
contains info for two different people.
>>> data = {
... 'person1-first_name': u'John',
... 'person1-last_name': u'Lennon',
... 'person1-birthday': u'1940-10-9',
... 'person2-first_name': u'Jim',
... 'person2-last_name': u'Morrison',
... 'person2-birthday': u'1943-12-8'
... }
If we use the correct prefix argument, we can create two different forms that
will only use and validate the data for fields with a matching prefix.
>>> p1 = Person(data, prefix='person1')
>>> p1.is_valid()
True
>>> p1.clean_data
{'first_name': u'John', 'last_name': u'Lennon', 'birthday': datetime.date(1940, 10, 9)}
>>> p2 = Person(data, prefix='person2')
>>> p2.is_valid()
True
>>> p2.clean_data
{'first_name': u'Jim', 'last_name': u'Morrison', 'birthday': datetime.date(1943, 12, 8)}
By default, forms append a hyphen between the prefix and the field name, but a
form can alter that behavior by implementing the add_prefix() method. This
method takes a field name and returns the prefixed field, according to
self.prefix.
>>> class Person(Form):
... first_name = CharField()
... last_name = CharField()
... birthday = DateField()
... def add_prefix(self, field_name):
... return self.prefix and '%s-prefix-%s' % (self.prefix, field_name) or field_name
>>> p = Person(prefix='foo')
>>> print p.as_ul()
<li><label for="id_foo-prefix-first_name">First name:</label> <input type="text" name="foo-prefix-first_name" id="id_foo-prefix-first_name" /></li>
<li><label for="id_foo-prefix-last_name">Last name:</label> <input type="text" name="foo-prefix-last_name" id="id_foo-prefix-last_name" /></li>
<li><label for="id_foo-prefix-birthday">Birthday:</label> <input type="text" name="foo-prefix-birthday" id="id_foo-prefix-birthday" /></li>
>>> data = {
... 'foo-prefix-first_name': u'John',
... 'foo-prefix-last_name': u'Lennon',
... 'foo-prefix-birthday': u'1940-10-9'
... }
>>> p = Person(data, prefix='foo')
>>> p.is_valid()
True
>>> p.clean_data
{'first_name': u'John', 'last_name': u'Lennon', 'birthday': datetime.date(1940, 10, 9)}
# Basic form processing in a view #############################################
>>> from django.template import Template, Context