unicode: Merged from trunk up to [5213].

git-svn-id: http://code.djangoproject.com/svn/django/branches/unicode@5214 bcc190cf-cafb-0310-a4f2-bffc1f526a37

3 files changed, 98 insertions, 1 deletions

diff --git a/tests/modeltests/model_forms/models.py b/tests/modeltests/model_forms/models.py
index 6855be0580..409cf83fcb 100644
--- a/tests/modeltests/model_forms/models.py
+++ b/tests/modeltests/model_forms/models.py
@@ -179,6 +179,18 @@ fields with the 'choices' attribute are represented by a ChoiceField.
 <option value="3">Third test</option>
 </select><br /> Hold down "Control", or "Command" on a Mac, to select more than one.</td></tr>
 
+You can restrict a form to a subset of the complete list of fields
+by providing a 'fields' argument. If you try to save a
+model created with such a form, you need to ensure that the fields
+that are _not_ on the form have default values, or are allowed to have
+a value of None. If a field isn't specified on a form, the object created
+from the form can't provide a value for that field!
+>>> PartialArticleForm = form_for_model(Article, fields=('headline','pub_date'))
+>>> f = PartialArticleForm(auto_id=False)
+>>> print f
+<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>
+
 You can pass a custom Form class to form_for_model. Make sure it's a
 subclass of BaseForm, not Form.
 >>> class CustomForm(BaseForm):
@@ -224,7 +236,23 @@ current values are inserted as 'initial' data in each Field.
 <option value="2">It&#39;s a test</option>
 <option value="3">Third test</option>
 </select>  Hold down "Control", or "Command" on a Mac, to select more than one.</li>
->>> f = TestArticleForm({'headline': u'New headline', 'pub_date': u'1988-01-04', 'writer': u'1', 'article': 'Hello.'})
+>>> f = TestArticleForm({'headline': u'Test headline', 'pub_date': u'1984-02-06', 'writer': u'1', 'article': 'Hello.'})
+>>> f.is_valid()
+True
+>>> test_art = f.save()
+>>> test_art.id
+1
+>>> test_art = Article.objects.get(id=1)
+>>> test_art.headline
+u'Test headline'
+
+You can create a form over a subset of the available fields
+by specifying a 'fields' argument to form_for_instance.
+>>> PartialArticleForm = form_for_instance(art, fields=('headline','pub_date'))
+>>> f = PartialArticleForm({'headline': u'New headline', 'pub_date': u'1988-01-04'}, auto_id=False)
+>>> print f.as_ul()
+<li>Headline: <input type="text" name="headline" value="New headline" maxlength="50" /></li>
+<li>Pub date: <input type="text" name="pub_date" value="1988-01-04" /></li>
 >>> f.is_valid()
 True
 >>> new_art = f.save()
diff --git a/tests/regressiontests/forms/tests.py b/tests/regressiontests/forms/tests.py
index 0d3a65277c..d6b08a0cd3 100644
--- a/tests/regressiontests/forms/tests.py
+++ b/tests/regressiontests/forms/tests.py
@@ -2752,6 +2752,64 @@ then the latter will get precedence.
 <li>Username: <input type="text" name="username" value="babik" maxlength="10" /></li>
 <li>Password: <input type="password" name="password" /></li>
 
+# Callable initial data ########################################################
+
+The previous technique dealt with raw values as initial data, but it's also
+possible to specify callable data.
+
+>>> class UserRegistration(Form):
+...    username = CharField(max_length=10)
+...    password = CharField(widget=PasswordInput)
+
+We need to define functions that get called later.
+>>> def initial_django():
+...     return 'django'
+>>> def initial_stephane():
+...     return 'stephane'
+
+Here, we're not submitting any data, so the initial value will be displayed.
+>>> p = UserRegistration(initial={'username': initial_django}, auto_id=False)
+>>> print p.as_ul()
+<li>Username: <input type="text" name="username" value="django" maxlength="10" /></li>
+<li>Password: <input type="password" name="password" /></li>
+
+The 'initial' parameter is meaningless if you pass data.
+>>> p = UserRegistration({}, initial={'username': initial_django}, auto_id=False)
+>>> print p.as_ul()
+<li><ul class="errorlist"><li>This field is required.</li></ul>Username: <input type="text" name="username" maxlength="10" /></li>
+<li><ul class="errorlist"><li>This field is required.</li></ul>Password: <input type="password" name="password" /></li>
+>>> p = UserRegistration({'username': u''}, initial={'username': initial_django}, auto_id=False)
+>>> print p.as_ul()
+<li><ul class="errorlist"><li>This field is required.</li></ul>Username: <input type="text" name="username" maxlength="10" /></li>
+<li><ul class="errorlist"><li>This field is required.</li></ul>Password: <input type="password" name="password" /></li>
+>>> p = UserRegistration({'username': u'foo'}, initial={'username': initial_django}, auto_id=False)
+>>> print p.as_ul()
+<li>Username: <input type="text" name="username" value="foo" maxlength="10" /></li>
+<li><ul class="errorlist"><li>This field is required.</li></ul>Password: <input type="password" name="password" /></li>
+
+A callable 'initial' value is *not* used as a fallback if data is not provided.
+In this example, we don't provide a value for 'username', and the form raises a
+validation error rather than using the initial value for 'username'.
+>>> p = UserRegistration({'password': 'secret'}, initial={'username': initial_django})
+>>> p.errors
+{'username': [u'This field is required.']}
+>>> p.is_valid()
+False
+
+If a Form defines 'initial' *and* 'initial' is passed as a parameter to Form(),
+then the latter will get precedence.
+>>> class UserRegistration(Form):
+...    username = CharField(max_length=10, initial=initial_django)
+...    password = CharField(widget=PasswordInput)
+>>> p = UserRegistration(auto_id=False)
+>>> print p.as_ul()
+<li>Username: <input type="text" name="username" value="django" maxlength="10" /></li>
+<li>Password: <input type="password" name="password" /></li>
+>>> p = UserRegistration(initial={'username': initial_stephane}, auto_id=False)
+>>> print p.as_ul()
+<li>Username: <input type="text" name="username" value="stephane" maxlength="10" /></li>
+<li>Password: <input type="password" name="password" /></li>
+
 # Help text ###################################################################
 
 You can specify descriptive text for a field by using the 'help_text' argument
diff --git a/tests/regressiontests/httpwrappers/tests.py b/tests/regressiontests/httpwrappers/tests.py
index f0a7ba5fef..e5d873c2c6 100644
--- a/tests/regressiontests/httpwrappers/tests.py
+++ b/tests/regressiontests/httpwrappers/tests.py
@@ -96,6 +96,12 @@ MultiValueDictKeyError: "Key 'foo' not found in <MultiValueDict: {}>"
 >>> q['name']
 u'john'
 
+>>> del q['name']
+>>> 'name' in q
+False
+
+>>> q['name'] = 'john'
+
 >>> q.get('foo', 'default')
 u'default'
 
@@ -367,6 +373,11 @@ AttributeError: This QueryDict instance is immutable
 >>> q.urlencode()
 'vote=yes&vote=no'
 
+>>> del q['vote']
+Traceback (most recent call last):
+...
+AttributeError: This QueryDict instance is immutable
+
 # QueryDicts must be able to handle invalid input encoding (in this case, bad
 # UTF-8 encoding).
 >>> q = QueryDict('foo=bar&foo=\xff')