per-object-permissions: Merged to trunk [4095]

git-svn-id: http://code.djangoproject.com/svn/django/branches/per-object-permissions@4096 bcc190cf-cafb-0310-a4f2-bffc1f526a37

3 files changed, 1242 insertions, 0 deletions

diff --git a/tests/regressiontests/forms/__init__.py b/tests/regressiontests/forms/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/tests/regressiontests/forms/__init__.py
diff --git a/tests/regressiontests/forms/models.py b/tests/regressiontests/forms/models.py
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/tests/regressiontests/forms/models.py
diff --git a/tests/regressiontests/forms/tests.py b/tests/regressiontests/forms/tests.py
new file mode 100644
index 0000000000..73fa3c27bf
--- /dev/null
+++ b/tests/regressiontests/forms/tests.py
@@ -0,0 +1,1242 @@
+# -*- coding: utf-8 -*-
+r"""
+>>> from django.newforms import *
+>>> import datetime
+>>> import re
+
+# TextInput Widget ############################################################
+
+>>> w = TextInput()
+>>> w.render('email', '')
+u'<input type="text" name="email" />'
+>>> w.render('email', None)
+u'<input type="text" name="email" />'
+>>> w.render('email', 'test@example.com')
+u'<input type="text" name="email" value="test@example.com" />'
+>>> w.render('email', 'some "quoted" & ampersanded value')
+u'<input type="text" name="email" value="some &quot;quoted&quot; &amp; ampersanded value" />'
+>>> w.render('email', 'test@example.com', attrs={'class': 'fun'})
+u'<input type="text" name="email" value="test@example.com" class="fun" />'
+
+# Note that doctest in Python 2.4 (and maybe 2.5?) doesn't support non-ascii
+# characters in output, so we're displaying the repr() here.
+>>> w.render('email', 'ŠĐĆŽćžšđ', attrs={'class': 'fun'})
+u'<input type="text" name="email" value="\u0160\u0110\u0106\u017d\u0107\u017e\u0161\u0111" class="fun" />'
+
+You can also pass 'attrs' to the constructor:
+>>> w = TextInput(attrs={'class': 'fun'})
+>>> w.render('email', '')
+u'<input type="text" class="fun" name="email" />'
+>>> w.render('email', 'foo@example.com')
+u'<input type="text" class="fun" value="foo@example.com" name="email" />'
+
+'attrs' passed to render() get precedence over those passed to the constructor:
+>>> w = TextInput(attrs={'class': 'pretty'})
+>>> w.render('email', '', attrs={'class': 'special'})
+u'<input type="text" class="special" name="email" />'
+
+# PasswordInput Widget ############################################################
+
+>>> w = PasswordInput()
+>>> w.render('email', '')
+u'<input type="password" name="email" />'
+>>> w.render('email', None)
+u'<input type="password" name="email" />'
+>>> w.render('email', 'test@example.com')
+u'<input type="password" name="email" value="test@example.com" />'
+>>> w.render('email', 'some "quoted" & ampersanded value')
+u'<input type="password" name="email" value="some &quot;quoted&quot; &amp; ampersanded value" />'
+>>> w.render('email', 'test@example.com', attrs={'class': 'fun'})
+u'<input type="password" name="email" value="test@example.com" class="fun" />'
+
+You can also pass 'attrs' to the constructor:
+>>> w = PasswordInput(attrs={'class': 'fun'})
+>>> w.render('email', '')
+u'<input type="password" class="fun" name="email" />'
+>>> w.render('email', 'foo@example.com')
+u'<input type="password" class="fun" value="foo@example.com" name="email" />'
+
+'attrs' passed to render() get precedence over those passed to the constructor:
+>>> w = PasswordInput(attrs={'class': 'pretty'})
+>>> w.render('email', '', attrs={'class': 'special'})
+u'<input type="password" class="special" name="email" />'
+
+>>> w.render('email', 'ŠĐĆŽćžšđ', attrs={'class': 'fun'})
+u'<input type="password" class="fun" value="\u0160\u0110\u0106\u017d\u0107\u017e\u0161\u0111" name="email" />'
+
+# HiddenInput Widget ############################################################
+
+>>> w = HiddenInput()
+>>> w.render('email', '')
+u'<input type="hidden" name="email" />'
+>>> w.render('email', None)
+u'<input type="hidden" name="email" />'
+>>> w.render('email', 'test@example.com')
+u'<input type="hidden" name="email" value="test@example.com" />'
+>>> w.render('email', 'some "quoted" & ampersanded value')
+u'<input type="hidden" name="email" value="some &quot;quoted&quot; &amp; ampersanded value" />'
+>>> w.render('email', 'test@example.com', attrs={'class': 'fun'})
+u'<input type="hidden" name="email" value="test@example.com" class="fun" />'
+
+You can also pass 'attrs' to the constructor:
+>>> w = HiddenInput(attrs={'class': 'fun'})
+>>> w.render('email', '')
+u'<input type="hidden" class="fun" name="email" />'
+>>> w.render('email', 'foo@example.com')
+u'<input type="hidden" class="fun" value="foo@example.com" name="email" />'
+
+'attrs' passed to render() get precedence over those passed to the constructor:
+>>> w = HiddenInput(attrs={'class': 'pretty'})
+>>> w.render('email', '', attrs={'class': 'special'})
+u'<input type="hidden" class="special" name="email" />'
+
+>>> w.render('email', 'ŠĐĆŽćžšđ', attrs={'class': 'fun'})
+u'<input type="hidden" class="fun" value="\u0160\u0110\u0106\u017d\u0107\u017e\u0161\u0111" name="email" />'
+
+'attrs' passed to render() get precedence over those passed to the constructor:
+>>> w = HiddenInput(attrs={'class': 'pretty'})
+>>> w.render('email', '', attrs={'class': 'special'})
+u'<input type="hidden" class="special" name="email" />'
+
+# FileInput Widget ############################################################
+
+>>> w = FileInput()
+>>> w.render('email', '')
+u'<input type="file" name="email" />'
+>>> w.render('email', None)
+u'<input type="file" name="email" />'
+>>> w.render('email', 'test@example.com')
+u'<input type="file" name="email" value="test@example.com" />'
+>>> w.render('email', 'some "quoted" & ampersanded value')
+u'<input type="file" name="email" value="some &quot;quoted&quot; &amp; ampersanded value" />'
+>>> w.render('email', 'test@example.com', attrs={'class': 'fun'})
+u'<input type="file" name="email" value="test@example.com" class="fun" />'
+
+You can also pass 'attrs' to the constructor:
+>>> w = FileInput(attrs={'class': 'fun'})
+>>> w.render('email', '')
+u'<input type="file" class="fun" name="email" />'
+>>> w.render('email', 'foo@example.com')
+u'<input type="file" class="fun" value="foo@example.com" name="email" />'
+
+>>> w.render('email', 'ŠĐĆŽćžšđ', attrs={'class': 'fun'})
+u'<input type="file" class="fun" value="\u0160\u0110\u0106\u017d\u0107\u017e\u0161\u0111" name="email" />'
+
+# Textarea Widget #############################################################
+
+>>> w = Textarea()
+>>> w.render('msg', '')
+u'<textarea name="msg"></textarea>'
+>>> w.render('msg', None)
+u'<textarea name="msg"></textarea>'
+>>> w.render('msg', 'value')
+u'<textarea name="msg">value</textarea>'
+>>> w.render('msg', 'some "quoted" & ampersanded value')
+u'<textarea name="msg">some &quot;quoted&quot; &amp; ampersanded value</textarea>'
+>>> w.render('msg', 'value', attrs={'class': 'pretty'})
+u'<textarea name="msg" class="pretty">value</textarea>'
+
+You can also pass 'attrs' to the constructor:
+>>> w = Textarea(attrs={'class': 'pretty'})
+>>> w.render('msg', '')
+u'<textarea class="pretty" name="msg"></textarea>'
+>>> w.render('msg', 'example')
+u'<textarea class="pretty" name="msg">example</textarea>'
+
+'attrs' passed to render() get precedence over those passed to the constructor:
+>>> w = Textarea(attrs={'class': 'pretty'})
+>>> w.render('msg', '', attrs={'class': 'special'})
+u'<textarea class="special" name="msg"></textarea>'
+
+>>> w.render('msg', 'ŠĐĆŽćžšđ', attrs={'class': 'fun'})
+u'<textarea class="fun" name="msg">\u0160\u0110\u0106\u017d\u0107\u017e\u0161\u0111</textarea>'
+
+# CheckboxInput Widget ########################################################
+
+>>> w = CheckboxInput()
+>>> w.render('is_cool', '')
+u'<input type="checkbox" name="is_cool" />'
+>>> w.render('is_cool', False)
+u'<input type="checkbox" name="is_cool" />'
+>>> w.render('is_cool', True)
+u'<input checked="checked" type="checkbox" name="is_cool" />'
+>>> w.render('is_cool', False, attrs={'class': 'pretty'})
+u'<input type="checkbox" name="is_cool" class="pretty" />'
+
+You can also pass 'attrs' to the constructor:
+>>> w = CheckboxInput(attrs={'class': 'pretty'})
+>>> w.render('is_cool', '')
+u'<input type="checkbox" class="pretty" name="is_cool" />'
+
+'attrs' passed to render() get precedence over those passed to the constructor:
+>>> w = CheckboxInput(attrs={'class': 'pretty'})
+>>> w.render('is_cool', '', attrs={'class': 'special'})
+u'<input type="checkbox" class="special" name="is_cool" />'
+
+# Select Widget ###############################################################
+
+>>> w = Select()
+>>> print w.render('beatle', 'J', choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+<select name="beatle">
+<option value="J" selected="selected">John</option>
+<option value="P">Paul</option>
+<option value="G">George</option>
+<option value="R">Ringo</option>
+</select>
+
+If the value is None, none of the options are selected:
+>>> print w.render('beatle', None, choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+<select name="beatle">
+<option value="J">John</option>
+<option value="P">Paul</option>
+<option value="G">George</option>
+<option value="R">Ringo</option>
+</select>
+
+If the value corresponds to a label (but not to an option value), none of the options are selected:
+>>> print w.render('beatle', 'John', choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+<select name="beatle">
+<option value="J">John</option>
+<option value="P">Paul</option>
+<option value="G">George</option>
+<option value="R">Ringo</option>
+</select>
+
+The value is compared to its str():
+>>> print w.render('num', 2, choices=[('1', '1'), ('2', '2'), ('3', '3')])
+<select name="num">
+<option value="1">1</option>
+<option value="2" selected="selected">2</option>
+<option value="3">3</option>
+</select>
+>>> print w.render('num', '2', choices=[(1, 1), (2, 2), (3, 3)])
+<select name="num">
+<option value="1">1</option>
+<option value="2" selected="selected">2</option>
+<option value="3">3</option>
+</select>
+>>> print w.render('num', 2, choices=[(1, 1), (2, 2), (3, 3)])
+<select name="num">
+<option value="1">1</option>
+<option value="2" selected="selected">2</option>
+<option value="3">3</option>
+</select>
+
+The 'choices' argument can be any iterable:
+>>> def get_choices():
+...     for i in range(5):
+...         yield (i, i)
+>>> print w.render('num', 2, choices=get_choices())
+<select name="num">
+<option value="0">0</option>
+<option value="1">1</option>
+<option value="2" selected="selected">2</option>
+<option value="3">3</option>
+<option value="4">4</option>
+</select>
+
+You can also pass 'choices' to the constructor:
+>>> w = Select(choices=[(1, 1), (2, 2), (3, 3)])
+>>> print w.render('num', 2)
+<select name="num">
+<option value="1">1</option>
+<option value="2" selected="selected">2</option>
+<option value="3">3</option>
+</select>
+
+If 'choices' is passed to both the constructor and render(), then they'll both be in the output:
+>>> print w.render('num', 2, choices=[(4, 4), (5, 5)])
+<select name="num">
+<option value="1">1</option>
+<option value="2" selected="selected">2</option>
+<option value="3">3</option>
+<option value="4">4</option>
+<option value="5">5</option>
+</select>
+
+>>> w.render('email', 'ŠĐĆŽćžšđ', choices=[('ŠĐĆŽćžšđ', 'ŠĐabcĆŽćžšđ'), ('ćžšđ', 'abcćžšđ')])
+u'<select name="email">\n<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="\u0160\u0110\u0106\u017d\u0107\u017e\u0161\u0111" selected="selected">\u0160\u0110abc\u0106\u017d\u0107\u017e\u0161\u0111</option>\n<option value="\u0107\u017e\u0161\u0111">abc\u0107\u017e\u0161\u0111</option>\n</select>'
+
+# SelectMultiple Widget #######################################################
+
+>>> w = SelectMultiple()
+>>> print w.render('beatles', ['J'], choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+<select multiple="multiple" name="beatles">
+<option value="J" selected="selected">John</option>
+<option value="P">Paul</option>
+<option value="G">George</option>
+<option value="R">Ringo</option>
+</select>
+>>> print w.render('beatles', ['J', 'P'], choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+<select multiple="multiple" name="beatles">
+<option value="J" selected="selected">John</option>
+<option value="P" selected="selected">Paul</option>
+<option value="G">George</option>
+<option value="R">Ringo</option>
+</select>
+>>> print w.render('beatles', ['J', 'P', 'R'], choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+<select multiple="multiple" name="beatles">
+<option value="J" selected="selected">John</option>
+<option value="P" selected="selected">Paul</option>
+<option value="G">George</option>
+<option value="R" selected="selected">Ringo</option>
+</select>
+
+If the value is None, none of the options are selected:
+>>> print w.render('beatles', None, choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+<select multiple="multiple" name="beatles">
+<option value="J">John</option>
+<option value="P">Paul</option>
+<option value="G">George</option>
+<option value="R">Ringo</option>
+</select>
+
+If the value corresponds to a label (but not to an option value), none of the options are selected:
+>>> print w.render('beatles', ['John'], choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+<select multiple="multiple" name="beatles">
+<option value="J">John</option>
+<option value="P">Paul</option>
+<option value="G">George</option>
+<option value="R">Ringo</option>
+</select>
+
+If multiple values are given, but some of them are not valid, the valid ones are selected:
+>>> print w.render('beatles', ['J', 'G', 'foo'], choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+<select multiple="multiple" name="beatles">
+<option value="J" selected="selected">John</option>
+<option value="P">Paul</option>
+<option value="G" selected="selected">George</option>
+<option value="R">Ringo</option>
+</select>
+
+The value is compared to its str():
+>>> print w.render('nums', [2], choices=[('1', '1'), ('2', '2'), ('3', '3')])
+<select multiple="multiple" name="nums">
+<option value="1">1</option>
+<option value="2" selected="selected">2</option>
+<option value="3">3</option>
+</select>
+>>> print w.render('nums', ['2'], choices=[(1, 1), (2, 2), (3, 3)])
+<select multiple="multiple" name="nums">
+<option value="1">1</option>
+<option value="2" selected="selected">2</option>
+<option value="3">3</option>
+</select>
+>>> print w.render('nums', [2], choices=[(1, 1), (2, 2), (3, 3)])
+<select multiple="multiple" name="nums">
+<option value="1">1</option>
+<option value="2" selected="selected">2</option>
+<option value="3">3</option>
+</select>
+
+The 'choices' argument can be any iterable:
+>>> def get_choices():
+...     for i in range(5):
+...         yield (i, i)
+>>> print w.render('nums', [2], choices=get_choices())
+<select multiple="multiple" name="nums">
+<option value="0">0</option>
+<option value="1">1</option>
+<option value="2" selected="selected">2</option>
+<option value="3">3</option>
+<option value="4">4</option>
+</select>
+
+You can also pass 'choices' to the constructor:
+>>> w = SelectMultiple(choices=[(1, 1), (2, 2), (3, 3)])
+>>> print w.render('nums', [2])
+<select multiple="multiple" name="nums">
+<option value="1">1</option>
+<option value="2" selected="selected">2</option>
+<option value="3">3</option>
+</select>
+
+If 'choices' is passed to both the constructor and render(), then they'll both be in the output:
+>>> print w.render('nums', [2], choices=[(4, 4), (5, 5)])
+<select multiple="multiple" name="nums">
+<option value="1">1</option>
+<option value="2" selected="selected">2</option>
+<option value="3">3</option>
+<option value="4">4</option>
+<option value="5">5</option>
+</select>
+
+>>> w.render('nums', ['ŠĐĆŽćžšđ'], choices=[('ŠĐĆŽćžšđ', 'ŠĐabcĆŽćžšđ'), ('ćžšđ', 'abcćžšđ')])
+u'<select multiple="multiple" name="nums">\n<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="\u0160\u0110\u0106\u017d\u0107\u017e\u0161\u0111" selected="selected">\u0160\u0110abc\u0106\u017d\u0107\u017e\u0161\u0111</option>\n<option value="\u0107\u017e\u0161\u0111">abc\u0107\u017e\u0161\u0111</option>\n</select>'
+
+# RadioSelect Widget ##########################################################
+
+>>> w = RadioSelect()
+>>> print w.render('beatle', 'J', choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+<ul>
+<li><label><input checked="checked" type="radio" name="beatle" value="J" /> John</label></li>
+<li><label><input type="radio" name="beatle" value="P" /> Paul</label></li>
+<li><label><input type="radio" name="beatle" value="G" /> George</label></li>
+<li><label><input type="radio" name="beatle" value="R" /> Ringo</label></li>
+</ul>
+
+If the value is None, none of the options are checked:
+>>> print w.render('beatle', None, choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+<ul>
+<li><label><input type="radio" name="beatle" value="J" /> John</label></li>
+<li><label><input type="radio" name="beatle" value="P" /> Paul</label></li>
+<li><label><input type="radio" name="beatle" value="G" /> George</label></li>
+<li><label><input type="radio" name="beatle" value="R" /> Ringo</label></li>
+</ul>
+
+If the value corresponds to a label (but not to an option value), none of the options are checked:
+>>> print w.render('beatle', 'John', choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+<ul>
+<li><label><input type="radio" name="beatle" value="J" /> John</label></li>
+<li><label><input type="radio" name="beatle" value="P" /> Paul</label></li>
+<li><label><input type="radio" name="beatle" value="G" /> George</label></li>
+<li><label><input type="radio" name="beatle" value="R" /> Ringo</label></li>
+</ul>
+
+The value is compared to its str():
+>>> print w.render('num', 2, choices=[('1', '1'), ('2', '2'), ('3', '3')])
+<ul>
+<li><label><input type="radio" name="num" value="1" /> 1</label></li>
+<li><label><input checked="checked" type="radio" name="num" value="2" /> 2</label></li>
+<li><label><input type="radio" name="num" value="3" /> 3</label></li>
+</ul>
+>>> print w.render('num', '2', choices=[(1, 1), (2, 2), (3, 3)])
+<ul>
+<li><label><input type="radio" name="num" value="1" /> 1</label></li>
+<li><label><input checked="checked" type="radio" name="num" value="2" /> 2</label></li>
+<li><label><input type="radio" name="num" value="3" /> 3</label></li>
+</ul>
+>>> print w.render('num', 2, choices=[(1, 1), (2, 2), (3, 3)])
+<ul>
+<li><label><input type="radio" name="num" value="1" /> 1</label></li>
+<li><label><input checked="checked" type="radio" name="num" value="2" /> 2</label></li>
+<li><label><input type="radio" name="num" value="3" /> 3</label></li>
+</ul>
+
+The 'choices' argument can be any iterable:
+>>> def get_choices():
+...     for i in range(5):
+...         yield (i, i)
+>>> print w.render('num', 2, choices=get_choices())
+<ul>
+<li><label><input type="radio" name="num" value="0" /> 0</label></li>
+<li><label><input type="radio" name="num" value="1" /> 1</label></li>
+<li><label><input checked="checked" type="radio" name="num" value="2" /> 2</label></li>
+<li><label><input type="radio" name="num" value="3" /> 3</label></li>
+<li><label><input type="radio" name="num" value="4" /> 4</label></li>
+</ul>
+
+You can also pass 'choices' to the constructor:
+>>> w = RadioSelect(choices=[(1, 1), (2, 2), (3, 3)])
+>>> print w.render('num', 2)
+<ul>
+<li><label><input type="radio" name="num" value="1" /> 1</label></li>
+<li><label><input checked="checked" type="radio" name="num" value="2" /> 2</label></li>
+<li><label><input type="radio" name="num" value="3" /> 3</label></li>
+</ul>
+
+If 'choices' is passed to both the constructor and render(), then they'll both be in the output:
+>>> print w.render('num', 2, choices=[(4, 4), (5, 5)])
+<ul>
+<li><label><input type="radio" name="num" value="1" /> 1</label></li>
+<li><label><input checked="checked" type="radio" name="num" value="2" /> 2</label></li>
+<li><label><input type="radio" name="num" value="3" /> 3</label></li>
+<li><label><input type="radio" name="num" value="4" /> 4</label></li>
+<li><label><input type="radio" name="num" value="5" /> 5</label></li>
+</ul>
+
+The render() method returns a RadioFieldRenderer object, whose str() is a <ul>.
+You can manipulate that object directly to customize the way the RadioSelect
+is rendered.
+>>> w = RadioSelect()
+>>> r = w.render('beatle', 'J', choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
+>>> for inp in r:
+...     print inp
+<label><input checked="checked" type="radio" name="beatle" value="J" /> John</label>
+<label><input type="radio" name="beatle" value="P" /> Paul</label>
+<label><input type="radio" name="beatle" value="G" /> George</label>
+<label><input type="radio" name="beatle" value="R" /> Ringo</label>
+>>> for inp in r:
+...     print '%s<br />' % inp
+<label><input checked="checked" type="radio" name="beatle" value="J" /> John</label><br />
+<label><input type="radio" name="beatle" value="P" /> Paul</label><br />
+<label><input type="radio" name="beatle" value="G" /> George</label><br />
+<label><input type="radio" name="beatle" value="R" /> Ringo</label><br />
+>>> for inp in r:
+...     print '<p>%s %s</p>' % (inp.tag(), inp.choice_label)
+<p><input checked="checked" type="radio" name="beatle" value="J" /> John</p>
+<p><input type="radio" name="beatle" value="P" /> Paul</p>
+<p><input type="radio" name="beatle" value="G" /> George</p>
+<p><input type="radio" name="beatle" value="R" /> Ringo</p>
+>>> for inp in r:
+...     print '%s %s %s %s %s' % (inp.name, inp.value, inp.choice_value, inp.choice_label, inp.is_checked())
+beatle J J John True
+beatle J P Paul False
+beatle J G George False
+beatle J R Ringo False
+
+# CharField ###################################################################
+
+>>> f = CharField(required=False)
+>>> f.clean(1)
+u'1'
+>>> f.clean('hello')
+u'hello'
+>>> f.clean(None)
+u''
+>>> f.clean([1, 2, 3])
+u'[1, 2, 3]'
+
+CharField accepts an optional max_length parameter:
+>>> f = CharField(max_length=10, required=False)
+>>> f.clean('')
+u''
+>>> f.clean('12345')
+u'12345'
+>>> f.clean('1234567890')
+u'1234567890'
+>>> f.clean('1234567890a')
+Traceback (most recent call last):
+...
+ValidationError: [u'Ensure this value has at most 10 characters.']
+
+CharField accepts an optional min_length parameter:
+>>> f = CharField(min_length=10, required=False)
+>>> f.clean('')
+Traceback (most recent call last):
+...
+ValidationError: [u'Ensure this value has at least 10 characters.']
+>>> f.clean('12345')
+Traceback (most recent call last):
+...
+ValidationError: [u'Ensure this value has at least 10 characters.']
+>>> f.clean('1234567890')
+u'1234567890'
+>>> f.clean('1234567890a')
+u'1234567890a'
+
+# IntegerField ################################################################
+
+>>> f = IntegerField()
+>>> f.clean('1')
+1
+>>> isinstance(f.clean('1'), int)
+True
+>>> f.clean('23')
+23
+>>> f.clean('a')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a whole number.']
+>>> f.clean('1 ')
+1
+>>> f.clean(' 1')
+1
+>>> f.clean(' 1 ')
+1
+>>> f.clean('1a')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a whole number.']
+
+# DateField ###################################################################
+
+>>> import datetime
+>>> f = DateField()
+>>> f.clean(datetime.date(2006, 10, 25))
+datetime.date(2006, 10, 25)
+>>> f.clean(datetime.datetime(2006, 10, 25, 14, 30))
+datetime.date(2006, 10, 25)
+>>> f.clean(datetime.datetime(2006, 10, 25, 14, 30, 59))
+datetime.date(2006, 10, 25)
+>>> f.clean(datetime.datetime(2006, 10, 25, 14, 30, 59, 200))
+datetime.date(2006, 10, 25)
+>>> f.clean('2006-10-25')
+datetime.date(2006, 10, 25)
+>>> f.clean('10/25/2006')
+datetime.date(2006, 10, 25)
+>>> f.clean('10/25/06')
+datetime.date(2006, 10, 25)
+>>> f.clean('Oct 25 2006')
+datetime.date(2006, 10, 25)
+>>> f.clean('October 25 2006')
+datetime.date(2006, 10, 25)
+>>> f.clean('October 25, 2006')
+datetime.date(2006, 10, 25)
+>>> f.clean('25 October 2006')
+datetime.date(2006, 10, 25)
+>>> f.clean('25 October, 2006')
+datetime.date(2006, 10, 25)
+>>> f.clean('2006-4-31')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid date.']
+>>> f.clean('200a-10-25')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid date.']
+>>> f.clean('25/10/06')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid date.']
+>>> f.clean(None)
+Traceback (most recent call last):
+...
+ValidationError: [u'This field is required.']
+
+>>> f = DateField(required=False)
+>>> f.clean(None)
+>>> repr(f.clean(None))
+'None'
+>>> f.clean('')
+>>> repr(f.clean(''))
+'None'
+
+DateField accepts an optional input_formats parameter:
+>>> f = DateField(input_formats=['%Y %m %d'])
+>>> f.clean(datetime.date(2006, 10, 25))
+datetime.date(2006, 10, 25)
+>>> f.clean(datetime.datetime(2006, 10, 25, 14, 30))
+datetime.date(2006, 10, 25)
+>>> f.clean('2006 10 25')
+datetime.date(2006, 10, 25)
+
+The input_formats parameter overrides all default input formats,
+so the default formats won't work unless you specify them:
+>>> f.clean('2006-10-25')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid date.']
+>>> f.clean('10/25/2006')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid date.']
+>>> f.clean('10/25/06')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid date.']
+
+# DateTimeField ###############################################################
+
+>>> import datetime
+>>> f = DateTimeField()
+>>> f.clean(datetime.date(2006, 10, 25))
+datetime.datetime(2006, 10, 25, 0, 0)
+>>> f.clean(datetime.datetime(2006, 10, 25, 14, 30))
+datetime.datetime(2006, 10, 25, 14, 30)
+>>> f.clean(datetime.datetime(2006, 10, 25, 14, 30, 59))
+datetime.datetime(2006, 10, 25, 14, 30, 59)
+>>> f.clean(datetime.datetime(2006, 10, 25, 14, 30, 59, 200))
+datetime.datetime(2006, 10, 25, 14, 30, 59, 200)
+>>> f.clean('2006-10-25 14:30:45')
+datetime.datetime(2006, 10, 25, 14, 30, 45)
+>>> f.clean('2006-10-25 14:30:00')
+datetime.datetime(2006, 10, 25, 14, 30)
+>>> f.clean('2006-10-25 14:30')
+datetime.datetime(2006, 10, 25, 14, 30)
+>>> f.clean('2006-10-25')
+datetime.datetime(2006, 10, 25, 0, 0)
+>>> f.clean('10/25/2006 14:30:45')
+datetime.datetime(2006, 10, 25, 14, 30, 45)
+>>> f.clean('10/25/2006 14:30:00')
+datetime.datetime(2006, 10, 25, 14, 30)
+>>> f.clean('10/25/2006 14:30')
+datetime.datetime(2006, 10, 25, 14, 30)
+>>> f.clean('10/25/2006')
+datetime.datetime(2006, 10, 25, 0, 0)
+>>> f.clean('10/25/06 14:30:45')
+datetime.datetime(2006, 10, 25, 14, 30, 45)
+>>> f.clean('10/25/06 14:30:00')
+datetime.datetime(2006, 10, 25, 14, 30)
+>>> f.clean('10/25/06 14:30')
+datetime.datetime(2006, 10, 25, 14, 30)
+>>> f.clean('10/25/06')
+datetime.datetime(2006, 10, 25, 0, 0)
+>>> f.clean('hello')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid date/time.']
+>>> f.clean('2006-10-25 4:30 p.m.')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid date/time.']
+
+DateField accepts an optional input_formats parameter:
+>>> f = DateTimeField(input_formats=['%Y %m %d %I:%M %p'])
+>>> f.clean(datetime.date(2006, 10, 25))
+datetime.datetime(2006, 10, 25, 0, 0)
+>>> f.clean(datetime.datetime(2006, 10, 25, 14, 30))
+datetime.datetime(2006, 10, 25, 14, 30)
+>>> f.clean(datetime.datetime(2006, 10, 25, 14, 30, 59))
+datetime.datetime(2006, 10, 25, 14, 30, 59)
+>>> f.clean(datetime.datetime(2006, 10, 25, 14, 30, 59, 200))
+datetime.datetime(2006, 10, 25, 14, 30, 59, 200)
+>>> f.clean('2006 10 25 2:30 PM')
+datetime.datetime(2006, 10, 25, 14, 30)
+
+The input_formats parameter overrides all default input formats,
+so the default formats won't work unless you specify them:
+>>> f.clean('2006-10-25 14:30:45')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid date/time.']
+
+# RegexField ##################################################################
+
+>>> f = RegexField('^\d[A-F]\d$')
+>>> f.clean('2A2')
+u'2A2'
+>>> f.clean('3F3')
+u'3F3'
+>>> f.clean('3G3')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid value.']
+>>> f.clean(' 2A2')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid value.']
+>>> f.clean('2A2 ')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid value.']
+
+Alternatively, RegexField can take a compiled regular expression:
+>>> f = RegexField(re.compile('^\d[A-F]\d$'))
+>>> f.clean('2A2')
+u'2A2'
+>>> f.clean('3F3')
+u'3F3'
+>>> f.clean('3G3')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid value.']
+>>> f.clean(' 2A2')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid value.']
+>>> f.clean('2A2 ')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid value.']
+
+RegexField takes an optional error_message argument:
+>>> f = RegexField('^\d\d\d\d$', 'Enter a four-digit number.')
+>>> f.clean('1234')
+u'1234'
+>>> f.clean('123')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a four-digit number.']
+>>> f.clean('abcd')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a four-digit number.']
+
+# EmailField ##################################################################
+
+>>> f = EmailField()
+>>> f.clean('person@example.com')
+u'person@example.com'
+>>> f.clean('foo')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid e-mail address.']
+>>> f.clean('foo@')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid e-mail address.']
+>>> f.clean('foo@bar')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid e-mail address.']
+
+# URLField ##################################################################
+
+>>> f = URLField()
+>>> f.clean('http://example.com')
+u'http://example.com'
+>>> f.clean('http://www.example.com')
+u'http://www.example.com'
+>>> f.clean('foo')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid URL.']
+>>> f.clean('example.com')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid URL.']
+>>> f.clean('http://')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid URL.']
+>>> f.clean('http://example')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid URL.']
+>>> f.clean('http://example.')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid URL.']
+>>> f.clean('http://.com')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid URL.']
+
+URLField takes an optional verify_exists parameter, which is False by default.
+This verifies that the URL is live on the Internet and doesn't return a 404 or 500:
+>>> f = URLField(verify_exists=True)
+>>> f.clean('http://www.google.com') # This will fail if there's no Internet connection
+u'http://www.google.com'
+>>> f.clean('http://example')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid URL.']
+>>> f.clean('http://www.jfoiwjfoi23jfoijoaijfoiwjofiwjefewl.com') # bad domain
+Traceback (most recent call last):
+...
+ValidationError: [u'This URL appears to be a broken link.']
+>>> f.clean('http://google.com/we-love-microsoft.html') # good domain, bad page
+Traceback (most recent call last):
+...
+ValidationError: [u'This URL appears to be a broken link.']
+
+# BooleanField ################################################################
+
+>>> f = BooleanField()
+>>> f.clean(True)
+True
+>>> f.clean(False)
+False
+>>> f.clean(1)
+True
+>>> f.clean(0)
+False
+>>> f.clean('Django rocks')
+True
+
+# ChoiceField #################################################################
+
+>>> f = ChoiceField(choices=[('1', '1'), ('2', '2')])
+>>> f.clean(1)
+u'1'
+>>> f.clean('1')
+u'1'
+>>> f.clean(None)
+Traceback (most recent call last):
+...
+ValidationError: [u'This field is required.']
+>>> f.clean('')
+Traceback (most recent call last):
+...
+ValidationError: [u'This field is required.']
+>>> f.clean('3')
+Traceback (most recent call last):
+...
+ValidationError: [u'Select a valid choice. 3 is not one of the available choices.']
+
+>>> f = ChoiceField(choices=[('J', 'John'), ('P', 'Paul')])
+>>> f.clean('J')
+u'J'
+>>> f.clean('John')
+Traceback (most recent call last):
+...
+ValidationError: [u'Select a valid choice. John is not one of the available choices.']
+
+# MultipleChoiceField #########################################################
+
+>>> f = MultipleChoiceField(choices=[('1', '1'), ('2', '2')])
+>>> f.clean([1])
+[u'1']
+>>> f.clean(['1'])
+[u'1']
+>>> f.clean(['1', '2'])
+[u'1', u'2']
+>>> f.clean([1, '2'])
+[u'1', u'2']
+>>> f.clean((1, '2'))
+[u'1', u'2']
+>>> f.clean('hello')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a list of values.']
+>>> f.clean([])
+Traceback (most recent call last):
+...
+ValidationError: [u'This field is required.']
+>>> f.clean(())
+Traceback (most recent call last):
+...
+ValidationError: [u'This field is required.']
+>>> f.clean(['3'])
+Traceback (most recent call last):
+...
+ValidationError: [u'Select a valid choice. 3 is not one of the available choices.']
+
+# ComboField ##################################################################
+
+ComboField takes a list of fields that should be used to validate a value,
+in that order:
+>>> f = ComboField(fields=[CharField(max_length=20), EmailField()])
+>>> f.clean('test@example.com')
+u'test@example.com'
+>>> f.clean('longemailaddress@example.com')
+Traceback (most recent call last):
+...
+ValidationError: [u'Ensure this value has at most 20 characters.']
+>>> f.clean('not an e-mail')
+Traceback (most recent call last):
+...
+ValidationError: [u'Enter a valid e-mail address.']
+>>> f.clean('')
+Traceback (most recent call last):
+...
+ValidationError: [u'This field is required.']
+>>> f.clean(None)
+Traceback (most recent call last):
+...
+ValidationError: [u'This field is required.']
+
+# Form ########################################################################
+
+>>> class Person(Form):
+...     first_name = CharField()
+...     last_name = CharField()
+...     birthday = DateField()
+>>> p = Person()
+>>> print p
+<tr><td>First name:</td><td><input type="text" name="first_name" /></td></tr>
+<tr><td>Last name:</td><td><input type="text" name="last_name" /></td></tr>
+<tr><td>Birthday:</td><td><input type="text" name="birthday" /></td></tr>
+>>> print p.as_table()
+<tr><td>First name:</td><td><input type="text" name="first_name" /></td></tr>
+<tr><td>Last name:</td><td><input type="text" name="last_name" /></td></tr>
+<tr><td>Birthday:</td><td><input type="text" name="birthday" /></td></tr>
+>>> print p.as_ul()
+<li>First name: <input type="text" name="first_name" /></li>
+<li>Last name: <input type="text" name="last_name" /></li>
+<li>Birthday: <input type="text" name="birthday" /></li>
+>>> print p.as_table_with_errors()
+<tr><td colspan="2"><ul><li>This field is required.</li></ul></td></tr>
+<tr><td>First name:</td><td><input type="text" name="first_name" /></td></tr>
+<tr><td colspan="2"><ul><li>This field is required.</li></ul></td></tr>
+<tr><td>Last name:</td><td><input type="text" name="last_name" /></td></tr>
+<tr><td colspan="2"><ul><li>This field is required.</li></ul></td></tr>
+<tr><td>Birthday:</td><td><input type="text" name="birthday" /></td></tr>
+>>> print p.as_ul_with_errors()
+<li><ul><li>This field is required.</li></ul>First name: <input type="text" name="first_name" /></li>
+<li><ul><li>This field is required.</li></ul>Last name: <input type="text" name="last_name" /></li>
+<li><ul><li>This field is required.</li></ul>Birthday: <input type="text" name="birthday" /></li>
+
+>>> p = Person({'first_name': u'John', 'last_name': u'Lennon', 'birthday': u'1940-10-9'})
+>>> p.errors()
+{}
+>>> p.is_valid()
+True
+>>> p.errors().as_ul()
+u''
+>>> p.errors().as_text()
+u''
+>>> p.clean()
+{'first_name': u'John', 'last_name': u'Lennon', 'birthday': datetime.date(1940, 10, 9)}
+>>> print p['first_name']
+<input type="text" name="first_name" value="John" />
+>>> print p['last_name']
+<input type="text" name="last_name" value="Lennon" />
+>>> print p['birthday']
+<input type="text" name="birthday" value="1940-10-9" />
+>>> for boundfield in p:
+...     print boundfield
+<input type="text" name="first_name" value="John" />
+<input type="text" name="last_name" value="Lennon" />
+<input type="text" name="birthday" value="1940-10-9" />
+>>> print p
+<tr><td>First name:</td><td><input type="text" name="first_name" value="John" /></td></tr>
+<tr><td>Last name:</td><td><input type="text" name="last_name" value="Lennon" /></td></tr>
+<tr><td>Birthday:</td><td><input type="text" name="birthday" value="1940-10-9" /></td></tr>
+
+>>> p = Person({'last_name': u'Lennon'})
+>>> p.errors()
+{'first_name': [u'This field is required.'], 'birthday': [u'This field is required.']}
+>>> p.is_valid()
+False
+>>> p.errors().as_ul()
+u'<ul class="errorlist"><li>first_name<ul class="errorlist"><li>This field is required.</li></ul></li><li>birthday<ul class="errorlist"><li>This field is required.</li></ul></li></ul>'
+>>> print p.errors().as_text()
+* first_name
+  * This field is required.
+* birthday
+  * This field is required.
+>>> p.clean()
+>>> repr(p.clean())
+'None'
+>>> p['first_name'].errors
+[u'This field is required.']
+>>> p['first_name'].errors.as_ul()
+u'<ul class="errorlist"><li>This field is required.</li></ul>'
+>>> p['first_name'].errors.as_text()
+u'* This field is required.'
+
+>>> p = Person()
+>>> print p['first_name']
+<input type="text" name="first_name" />
+>>> print p['last_name']
+<input type="text" name="last_name" />
+>>> print p['birthday']
+<input type="text" name="birthday" />
+
+"auto_id" tells the Form to add an "id" attribute to each form element.
+If it's a string that contains '%s', Django will use that as a format string
+into which the field's name will be inserted.
+>>> p = Person(auto_id='id_%s')
+>>> print p.as_ul()
+<li>First name: <input type="text" name="first_name" id="id_first_name" /></li>
+<li>Last name: <input type="text" name="last_name" id="id_last_name" /></li>
+<li>Birthday: <input type="text" name="birthday" id="id_birthday" /></li>
+
+If auto_id is any True value whose str() does not contain '%s', the "id"
+attribute will be the name of the field.
+>>> p = Person(auto_id=True)
+>>> print p.as_ul()
+<li>First name: <input type="text" name="first_name" id="first_name" /></li>
+<li>Last name: <input type="text" name="last_name" id="last_name" /></li>
+<li>Birthday: <input type="text" name="birthday" id="birthday" /></li>
+
+If auto_id is any False value, an "id" attribute won't be output unless it
+was manually entered.
+>>> p = Person(auto_id=False)
+>>> print p.as_ul()
+<li>First name: <input type="text" name="first_name" /></li>
+<li>Last name: <input type="text" name="last_name" /></li>
+<li>Birthday: <input type="text" name="birthday" /></li>
+
+In this example, auto_id is False, but the "id" attribute for the "first_name"
+field is given.
+>>> class PersonNew(Form):
+...     first_name = CharField(widget=TextInput(attrs={'id': 'first_name_id'}))
+...     last_name = CharField()
+...     birthday = DateField()
+>>> p = PersonNew(auto_id=False)
+>>> print p.as_ul()
+<li>First name: <input type="text" id="first_name_id" name="first_name" /></li>
+<li>Last name: <input type="text" name="last_name" /></li>
+<li>Birthday: <input type="text" name="birthday" /></li>
+
+If the "id" attribute is specified in the Form and auto_id is True, the "id"
+attribute in the Form gets precedence.
+>>> p = PersonNew(auto_id=True)
+>>> print p.as_ul()
+<li>First name: <input type="text" id="first_name_id" name="first_name" /></li>
+<li>Last name: <input type="text" name="last_name" id="last_name" /></li>
+<li>Birthday: <input type="text" name="birthday" id="birthday" /></li>
+
+>>> class SignupForm(Form):
+...     email = EmailField()
+...     get_spam = BooleanField()
+>>> f = SignupForm()
+>>> print f['email']
+<input type="text" name="email" />
+>>> print f['get_spam']
+<input type="checkbox" name="get_spam" />
+
+>>> f = SignupForm({'email': 'test@example.com', 'get_spam': True})
+>>> print f['email']
+<input type="text" name="email" value="test@example.com" />
+>>> print f['get_spam']
+<input checked="checked" type="checkbox" name="get_spam" />
+
+Any Field can have a Widget class passed to its constructor:
+>>> class ContactForm(Form):
+...     subject = CharField()
+...     message = CharField(widget=Textarea)
+>>> f = ContactForm()
+>>> print f['subject']
+<input type="text" name="subject" />
+>>> print f['message']
+<textarea name="message"></textarea>
+
+as_textarea() and as_text() are shortcuts for changing the output widget type:
+>>> f['subject'].as_textarea()
+u'<textarea name="subject"></textarea>'
+>>> f['message'].as_text()
+u'<input type="text" name="message" />'
+
+The 'widget' parameter to a Field can also be an instance:
+>>> class ContactForm(Form):
+...     subject = CharField()
+...     message = CharField(widget=Textarea(attrs={'rows': 80, 'cols': 20}))
+>>> f = ContactForm()
+>>> print f['message']
+<textarea rows="80" cols="20" name="message"></textarea>
+
+Instance-level attrs are *not* carried over to as_textarea() and as_text():
+>>> f['message'].as_text()
+u'<input type="text" name="message" />'
+>>> f = ContactForm({'subject': 'Hello', 'message': 'I love you.'})
+>>> f['subject'].as_textarea()
+u'<textarea name="subject">Hello</textarea>'
+>>> f['message'].as_text()
+u'<input type="text" name="message" value="I love you." />'
+
+For a form with a <select>, use ChoiceField:
+>>> class FrameworkForm(Form):
+...     name = CharField()
+...     language = ChoiceField(choices=[('P', 'Python'), ('J', 'Java')])
+>>> f = FrameworkForm()
+>>> print f['language']
+<select name="language">
+<option value="P">Python</option>
+<option value="J">Java</option>
+</select>
+>>> f = FrameworkForm({'name': 'Django', 'language': 'P'})
+>>> print f['language']
+<select name="language">
+<option value="P" selected="selected">Python</option>
+<option value="J">Java</option>
+</select>
+
+MultipleChoiceField is a special case, as its data is required to be a list:
+>>> class SongForm(Form):
+...     name = CharField()
+...     composers = MultipleChoiceField()
+>>> f = SongForm()
+>>> print f['composers']
+<select multiple="multiple" name="composers">
+</select>
+>>> class SongForm(Form):
+...     name = CharField()
+...     composers = MultipleChoiceField(choices=[('J', 'John Lennon'), ('P', 'Paul McCartney')])
+>>> f = SongForm()
+>>> print f['composers']
+<select multiple="multiple" name="composers">
+<option value="J">John Lennon</option>
+<option value="P">Paul McCartney</option>
+</select>
+>>> f = SongForm({'name': 'Yesterday', 'composers': ['P']})
+>>> print f['name']
+<input type="text" name="name" value="Yesterday" />
+>>> print f['composers']
+<select multiple="multiple" name="composers">
+<option value="J">John Lennon</option>
+<option value="P" selected="selected">Paul McCartney</option>
+</select>
+
+There are a couple of ways to do multiple-field validation. If you want the
+validation message to be associated with a particular field, implement the
+clean_XXX() method on the Form, where XXX is the field name. As in
+Field.clean(), the clean_XXX() method should return the cleaned value:
+>>> class UserRegistration(Form):
+...    username = CharField(max_length=10)
+...    password1 = CharField(widget=PasswordInput)
+...    password2 = CharField(widget=PasswordInput)
+...    def clean_password2(self):
+...        if self.clean_data.get('password1') and self.clean_data.get('password2') and self.clean_data['password1'] != self.clean_data['password2']:
+...            raise ValidationError(u'Please make sure your passwords match.')
+...        return self.clean_data['password2']
+>>> f = UserRegistration()
+>>> f.errors()
+{'username': [u'This field is required.'], 'password1': [u'This field is required.'], 'password2': [u'This field is required.']}
+>>> f = UserRegistration({'username': 'adrian', 'password1': 'foo', 'password2': 'bar'})
+>>> f.errors()
+{'password2': [u'Please make sure your passwords match.']}
+>>> f = UserRegistration({'username': 'adrian', 'password1': 'foo', 'password2': 'foo'})
+>>> f.errors()
+{}
+>>> f.clean()
+{'username': u'adrian', 'password1': u'foo', 'password2': u'foo'}
+
+Another way of doing multiple-field validation is by implementing the
+Form's clean() method. If you do this, any ValidationError raised by that
+method will not be associated with a particular field; it will have a
+special-case association with the field named '__all__'. Note that
+Form.clean() still needs to return a dictionary of all clean data:
+>>> class UserRegistration(Form):
+...    username = CharField(max_length=10)
+...    password1 = CharField(widget=PasswordInput)
+...    password2 = CharField(widget=PasswordInput)
+...    def clean(self):
+...        if self.clean_data.get('password1') and self.clean_data.get('password2') and self.clean_data['password1'] != self.clean_data['password2']:
+...            raise ValidationError(u'Please make sure your passwords match.')
+...        return self.clean_data
+>>> f = UserRegistration()
+>>> print f.as_table()
+<tr><td>Username:</td><td><input type="text" name="username" /></td></tr>
+<tr><td>Password1:</td><td><input type="password" name="password1" /></td></tr>
+<tr><td>Password2:</td><td><input type="password" name="password2" /></td></tr>
+>>> f.errors()
+{'username': [u'This field is required.'], 'password1': [u'This field is required.'], 'password2': [u'This field is required.']}
+>>> f = UserRegistration({'username': 'adrian', 'password1': 'foo', 'password2': 'bar'})
+>>> f.errors()
+{'__all__': [u'Please make sure your passwords match.']}
+>>> print f.as_table()
+<tr><td>Username:</td><td><input type="text" name="username" value="adrian" /></td></tr>
+<tr><td>Password1:</td><td><input type="password" name="password1" value="foo" /></td></tr>
+<tr><td>Password2:</td><td><input type="password" name="password2" value="bar" /></td></tr>
+>>> print f.as_table_with_errors()
+<tr><td colspan="2"><ul><li>Please make sure your passwords match.</li></ul></td></tr>
+<tr><td>Username:</td><td><input type="text" name="username" value="adrian" /></td></tr>
+<tr><td>Password1:</td><td><input type="password" name="password1" value="foo" /></td></tr>
+<tr><td>Password2:</td><td><input type="password" name="password2" value="bar" /></td></tr>
+>>> print f.as_ul_with_errors()
+<li><ul><li>Please make sure your passwords match.</li></ul></li>
+<li>Username: <input type="text" name="username" value="adrian" /></li>
+<li>Password1: <input type="password" name="password1" value="foo" /></li>
+<li>Password2: <input type="password" name="password2" value="bar" /></li>
+>>> f = UserRegistration({'username': 'adrian', 'password1': 'foo', 'password2': 'foo'})
+>>> f.errors()
+{}
+>>> f.clean()
+{'username': u'adrian', 'password1': u'foo', 'password2': u'foo'}
+
+It's possible to construct a Form dynamically by adding to the self.fields
+dictionary in __init__(). Don't forget to call Form.__init__() within the
+subclass' __init__().
+>>> class Person(Form):
+...     first_name = CharField()
+...     last_name = CharField()
+...     def __init__(self):
+...         super(Person, self).__init__()
+...         self.fields['birthday'] = DateField()
+>>> p = Person()
+>>> print p
+<tr><td>First name:</td><td><input type="text" name="first_name" /></td></tr>
+<tr><td>Last name:</td><td><input type="text" name="last_name" /></td></tr>
+<tr><td>Birthday:</td><td><input type="text" name="birthday" /></td></tr>
+
+A Form's fields are displayed in the same order in which they were defined.
+>>> class TestForm(Form):
+...     field1 = CharField()
+...     field2 = CharField()
+...     field3 = CharField()
+...     field4 = CharField()
+...     field5 = CharField()
+...     field6 = CharField()
+...     field7 = CharField()
+...     field8 = CharField()
+...     field9 = CharField()
+...     field10 = CharField()
+...     field11 = CharField()
+...     field12 = CharField()
+...     field13 = CharField()
+...     field14 = CharField()
+>>> p = TestForm()
+>>> print p
+<tr><td>Field1:</td><td><input type="text" name="field1" /></td></tr>
+<tr><td>Field2:</td><td><input type="text" name="field2" /></td></tr>
+<tr><td>Field3:</td><td><input type="text" name="field3" /></td></tr>
+<tr><td>Field4:</td><td><input type="text" name="field4" /></td></tr>
+<tr><td>Field5:</td><td><input type="text" name="field5" /></td></tr>
+<tr><td>Field6:</td><td><input type="text" name="field6" /></td></tr>
+<tr><td>Field7:</td><td><input type="text" name="field7" /></td></tr>
+<tr><td>Field8:</td><td><input type="text" name="field8" /></td></tr>
+<tr><td>Field9:</td><td><input type="text" name="field9" /></td></tr>
+<tr><td>Field10:</td><td><input type="text" name="field10" /></td></tr>
+<tr><td>Field11:</td><td><input type="text" name="field11" /></td></tr>
+<tr><td>Field12:</td><td><input type="text" name="field12" /></td></tr>
+<tr><td>Field13:</td><td><input type="text" name="field13" /></td></tr>
+<tr><td>Field14:</td><td><input type="text" name="field14" /></td></tr>
+"""
+
+if __name__ == "__main__":
+    import doctest
+    doctest.testmod()