--- a/thirdparty/google_appengine/lib/django/tests/modeltests/model_forms/models.py Sun Sep 06 23:31:53 2009 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,464 +0,0 @@
-"""
-36. Generating HTML forms from models
-
-Django provides shortcuts for creating Form objects from a model class and a
-model instance.
-
-The function django.newforms.form_for_model() takes a model class and returns
-a Form that is tied to the model. This Form works just like any other Form,
-with one additional method: save(). The save() method creates an instance
-of the model and returns that newly created instance. It saves the instance to
-the database if save(commit=True), which is default. If you pass
-commit=False, then you'll get the object without committing the changes to the
-database.
-
-The function django.newforms.form_for_instance() takes a model instance and
-returns a Form that is tied to the instance. This form works just like any
-other Form, with one additional method: save(). The save()
-method updates the model instance. It also takes a commit=True parameter.
-
-The function django.newforms.save_instance() takes a bound form instance and a
-model instance and saves the form's clean_data into the instance. It also takes
-a commit=True parameter.
-"""
-
-from django.db import models
-
-class Category(models.Model):
- name = models.CharField(maxlength=20)
- url = models.CharField('The URL', maxlength=40)
-
- def __str__(self):
- return self.name
-
-class Writer(models.Model):
- name = models.CharField(maxlength=50, help_text='Use both first and last names.')
-
- def __str__(self):
- return self.name
-
-class Article(models.Model):
- headline = models.CharField(maxlength=50)
- pub_date = models.DateField()
- created = models.DateField(editable=False)
- writer = models.ForeignKey(Writer)
- article = models.TextField()
- categories = models.ManyToManyField(Category, blank=True)
-
- def save(self):
- import datetime
- if not self.id:
- self.created = datetime.date.today()
- return super(Article, self).save()
-
- def __str__(self):
- return self.headline
-
-class PhoneNumber(models.Model):
- phone = models.PhoneNumberField()
- description = models.CharField(maxlength=20)
-
- def __str__(self):
- return self.phone
-
-__test__ = {'API_TESTS': """
->>> from django.newforms import form_for_model, form_for_instance, save_instance, BaseForm, Form, CharField
->>> import datetime
-
->>> Category.objects.all()
-[]
-
->>> CategoryForm = form_for_model(Category)
->>> f = CategoryForm()
->>> print f
-<tr><th><label for="id_name">Name:</label></th><td><input id="id_name" type="text" name="name" maxlength="20" /></td></tr>
-<tr><th><label for="id_url">The URL:</label></th><td><input id="id_url" type="text" name="url" maxlength="40" /></td></tr>
->>> print f.as_ul()
-<li><label for="id_name">Name:</label> <input id="id_name" type="text" name="name" maxlength="20" /></li>
-<li><label for="id_url">The URL:</label> <input id="id_url" type="text" name="url" maxlength="40" /></li>
->>> print f['name']
-<input id="id_name" type="text" name="name" maxlength="20" />
-
->>> f = CategoryForm(auto_id=False)
->>> print f.as_ul()
-<li>Name: <input type="text" name="name" maxlength="20" /></li>
-<li>The URL: <input type="text" name="url" maxlength="40" /></li>
-
->>> f = CategoryForm({'name': 'Entertainment', 'url': 'entertainment'})
->>> f.is_valid()
-True
->>> f.clean_data
-{'url': u'entertainment', 'name': u'Entertainment'}
->>> obj = f.save()
->>> obj
-<Category: Entertainment>
->>> Category.objects.all()
-[<Category: Entertainment>]
-
->>> f = CategoryForm({'name': "It's a test", 'url': 'test'})
->>> f.is_valid()
-True
->>> f.clean_data
-{'url': u'test', 'name': u"It's a test"}
->>> obj = f.save()
->>> obj
-<Category: It's a test>
->>> Category.objects.all()
-[<Category: Entertainment>, <Category: It's a test>]
-
-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.
->>> f = CategoryForm({'name': 'Third test', 'url': 'third'})
->>> f.is_valid()
-True
->>> f.clean_data
-{'url': u'third', 'name': u'Third test'}
->>> obj = f.save(commit=False)
->>> obj
-<Category: Third test>
->>> Category.objects.all()
-[<Category: Entertainment>, <Category: It's a test>]
->>> obj.save()
->>> Category.objects.all()
-[<Category: Entertainment>, <Category: It's a test>, <Category: Third test>]
-
-If you call save() with invalid data, you'll get a ValueError.
->>> f = CategoryForm({'name': '', 'url': 'foo'})
->>> f.errors
-{'name': [u'This field is required.']}
->>> f.clean_data
-Traceback (most recent call last):
-...
-AttributeError: 'CategoryForm' object has no attribute 'clean_data'
->>> f.save()
-Traceback (most recent call last):
-...
-ValueError: The Category could not be created because the data didn't validate.
->>> f = CategoryForm({'name': '', 'url': 'foo'})
->>> f.save()
-Traceback (most recent call last):
-...
-ValueError: The Category could not be created because the data didn't validate.
-
-Create a couple of Writers.
->>> w = Writer(name='Mike Royko')
->>> w.save()
->>> w = Writer(name='Bob Woodward')
->>> w.save()
-
-ManyToManyFields are represented by a MultipleChoiceField, and ForeignKeys are
-represented by a ChoiceField.
->>> ArticleForm = form_for_model(Article)
->>> f = ArticleForm(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>
-<tr><th>Writer:</th><td><select name="writer">
-<option value="" selected="selected">---------</option>
-<option value="1">Mike Royko</option>
-<option value="2">Bob Woodward</option>
-</select></td></tr>
-<tr><th>Article:</th><td><textarea name="article"></textarea></td></tr>
-<tr><th>Categories:</th><td><select multiple="multiple" name="categories">
-<option value="1">Entertainment</option>
-<option value="2">It's a test</option>
-<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 pass a custom Form class to form_for_model. Make sure it's a
-subclass of BaseForm, not Form.
->>> class CustomForm(BaseForm):
-... def say_hello(self):
-... print 'hello'
->>> CategoryForm = form_for_model(Category, form=CustomForm)
->>> f = CategoryForm()
->>> f.say_hello()
-hello
-
-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.
->>> w = Writer.objects.get(name='Mike Royko')
->>> RoykoForm = form_for_instance(w)
->>> f = RoykoForm(auto_id=False)
->>> print f
-<tr><th>Name:</th><td><input type="text" name="name" value="Mike Royko" maxlength="50" /><br />Use both first and last names.</td></tr>
-
->>> art = Article(headline='Test article', pub_date=datetime.date(1988, 1, 4), writer=w, article='Hello.')
->>> art.save()
->>> art.id
-1
->>> TestArticleForm = form_for_instance(art)
->>> f = TestArticleForm(auto_id=False)
->>> print f.as_ul()
-<li>Headline: <input type="text" name="headline" value="Test article" maxlength="50" /></li>
-<li>Pub date: <input type="text" name="pub_date" value="1988-01-04" /></li>
-<li>Writer: <select name="writer">
-<option value="">---------</option>
-<option value="1" selected="selected">Mike Royko</option>
-<option value="2">Bob Woodward</option>
-</select></li>
-<li>Article: <textarea name="article">Hello.</textarea></li>
-<li>Categories: <select multiple="multiple" name="categories">
-<option value="1">Entertainment</option>
-<option value="2">It'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.is_valid()
-True
->>> new_art = f.save()
->>> new_art.id
-1
->>> new_art = Article.objects.get(id=1)
->>> new_art.headline
-'New headline'
-
-Add some categories and test the many-to-many form output.
->>> new_art.categories.all()
-[]
->>> new_art.categories.add(Category.objects.get(name='Entertainment'))
->>> new_art.categories.all()
-[<Category: Entertainment>]
->>> TestArticleForm = form_for_instance(new_art)
->>> f = TestArticleForm(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>
-<li>Writer: <select name="writer">
-<option value="">---------</option>
-<option value="1" selected="selected">Mike Royko</option>
-<option value="2">Bob Woodward</option>
-</select></li>
-<li>Article: <textarea name="article">Hello.</textarea></li>
-<li>Categories: <select multiple="multiple" name="categories">
-<option value="1" selected="selected">Entertainment</option>
-<option value="2">It'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': u'Hello.', 'categories': [u'1', u'2']})
->>> new_art = f.save()
->>> new_art.id
-1
->>> new_art = Article.objects.get(id=1)
->>> new_art.categories.all()
-[<Category: Entertainment>, <Category: It's a test>]
-
-Now, submit form data with no categories. This deletes the existing categories.
->>> f = TestArticleForm({'headline': u'New headline', 'pub_date': u'1988-01-04',
-... 'writer': u'1', 'article': u'Hello.'})
->>> new_art = f.save()
->>> new_art.id
-1
->>> new_art = Article.objects.get(id=1)
->>> new_art.categories.all()
-[]
-
-Create a new article, with categories, via the form.
->>> ArticleForm = form_for_model(Article)
->>> f = ArticleForm({'headline': u'The walrus was Paul', 'pub_date': u'1967-11-01',
-... 'writer': u'1', 'article': u'Test.', 'categories': [u'1', u'2']})
->>> new_art = f.save()
->>> new_art.id
-2
->>> new_art = Article.objects.get(id=2)
->>> new_art.categories.all()
-[<Category: Entertainment>, <Category: It's a test>]
-
-Create a new article, with no categories, via the form.
->>> ArticleForm = form_for_model(Article)
->>> f = ArticleForm({'headline': u'The walrus was Paul', 'pub_date': u'1967-11-01',
-... 'writer': u'1', 'article': u'Test.'})
->>> new_art = f.save()
->>> new_art.id
-3
->>> new_art = Article.objects.get(id=3)
->>> new_art.categories.all()
-[]
-
-Here, we define a custom Form. Because it happens to have the same fields as
-the Category model, we can use save_instance() to apply its changes to an
-existing Category instance.
->>> class ShortCategory(Form):
-... name = CharField(max_length=5)
-... url = CharField(max_length=3)
->>> cat = Category.objects.get(name='Third test')
->>> cat
-<Category: Third test>
->>> cat.id
-3
->>> sc = ShortCategory({'name': 'Third', 'url': '3rd'})
->>> save_instance(sc, cat)
-<Category: Third>
->>> Category.objects.get(id=3)
-<Category: Third>
-
-Here, we demonstrate that choices for a ForeignKey ChoiceField are determined
-at runtime, based on the data in the database when the form is displayed, not
-the data in the database when the form is instantiated.
->>> ArticleForm = form_for_model(Article)
->>> f = ArticleForm(auto_id=False)
->>> print f.as_ul()
-<li>Headline: <input type="text" name="headline" maxlength="50" /></li>
-<li>Pub date: <input type="text" name="pub_date" /></li>
-<li>Writer: <select name="writer">
-<option value="" selected="selected">---------</option>
-<option value="1">Mike Royko</option>
-<option value="2">Bob Woodward</option>
-</select></li>
-<li>Article: <textarea name="article"></textarea></li>
-<li>Categories: <select multiple="multiple" name="categories">
-<option value="1">Entertainment</option>
-<option value="2">It's a test</option>
-<option value="3">Third</option>
-</select> Hold down "Control", or "Command" on a Mac, to select more than one.</li>
->>> Category.objects.create(name='Fourth', url='4th')
-<Category: Fourth>
->>> Writer.objects.create(name='Carl Bernstein')
-<Writer: Carl Bernstein>
->>> print f.as_ul()
-<li>Headline: <input type="text" name="headline" maxlength="50" /></li>
-<li>Pub date: <input type="text" name="pub_date" /></li>
-<li>Writer: <select name="writer">
-<option value="" selected="selected">---------</option>
-<option value="1">Mike Royko</option>
-<option value="2">Bob Woodward</option>
-<option value="3">Carl Bernstein</option>
-</select></li>
-<li>Article: <textarea name="article"></textarea></li>
-<li>Categories: <select multiple="multiple" name="categories">
-<option value="1">Entertainment</option>
-<option value="2">It's a test</option>
-<option value="3">Third</option>
-<option value="4">Fourth</option>
-</select> Hold down "Control", or "Command" on a Mac, to select more than one.</li>
-
-# ModelChoiceField ############################################################
-
->>> from django.newforms import ModelChoiceField, ModelMultipleChoiceField
-
->>> f = ModelChoiceField(Category.objects.all())
->>> 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.']
->>> f.clean(0)
-Traceback (most recent call last):
-...
-ValidationError: [u'Select a valid choice. That choice is not one of the available choices.']
->>> f.clean(3)
-<Category: Third>
->>> f.clean(2)
-<Category: It's a test>
-
-# Add a Category object *after* the ModelChoiceField has already been
-# instantiated. This proves clean() checks the database during clean() rather
-# than caching it at time of instantiation.
->>> Category.objects.create(name='Fifth', url='5th')
-<Category: Fifth>
->>> f.clean(5)
-<Category: Fifth>
-
-# Delete a Category object *after* the ModelChoiceField has already been
-# instantiated. This proves clean() checks the database during clean() rather
-# than caching it at time of instantiation.
->>> Category.objects.get(url='5th').delete()
->>> f.clean(5)
-Traceback (most recent call last):
-...
-ValidationError: [u'Select a valid choice. That choice is not one of the available choices.']
-
->>> f = ModelChoiceField(Category.objects.filter(pk=1), required=False)
->>> print f.clean('')
-None
->>> f.clean('')
->>> f.clean('1')
-<Category: Entertainment>
->>> f.clean('100')
-Traceback (most recent call last):
-...
-ValidationError: [u'Select a valid choice. That choice is not one of the available choices.']
-
-# ModelMultipleChoiceField ####################################################
-
->>> f = ModelMultipleChoiceField(Category.objects.all())
->>> 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([1])
-[<Category: Entertainment>]
->>> f.clean([2])
-[<Category: It's a test>]
->>> f.clean(['1'])
-[<Category: Entertainment>]
->>> f.clean(['1', '2'])
-[<Category: Entertainment>, <Category: It's a test>]
->>> f.clean([1, '2'])
-[<Category: Entertainment>, <Category: It's a test>]
->>> f.clean((1, '2'))
-[<Category: Entertainment>, <Category: It's a test>]
->>> f.clean(['100'])
-Traceback (most recent call last):
-...
-ValidationError: [u'Select a valid choice. 100 is not one of the available choices.']
->>> f.clean('hello')
-Traceback (most recent call last):
-...
-ValidationError: [u'Enter a list of values.']
-
-# Add a Category object *after* the ModelChoiceField has already been
-# instantiated. This proves clean() checks the database during clean() rather
-# than caching it at time of instantiation.
->>> Category.objects.create(id=6, name='Sixth', url='6th')
-<Category: Sixth>
->>> f.clean([6])
-[<Category: Sixth>]
-
-# Delete a Category object *after* the ModelChoiceField has already been
-# instantiated. This proves clean() checks the database during clean() rather
-# than caching it at time of instantiation.
->>> Category.objects.get(url='6th').delete()
->>> f.clean([6])
-Traceback (most recent call last):
-...
-ValidationError: [u'Select a valid choice. 6 is not one of the available choices.']
-
->>> f = ModelMultipleChoiceField(Category.objects.all(), required=False)
->>> f.clean([])
-[]
->>> f.clean(())
-[]
->>> f.clean(['10'])
-Traceback (most recent call last):
-...
-ValidationError: [u'Select a valid choice. 10 is not one of the available choices.']
->>> f.clean(['3', '10'])
-Traceback (most recent call last):
-...
-ValidationError: [u'Select a valid choice. 10 is not one of the available choices.']
->>> f.clean(['1', '10'])
-Traceback (most recent call last):
-...
-ValidationError: [u'Select a valid choice. 10 is not one of the available choices.']
-
-# PhoneNumberField ############################################################
-
->>> PhoneNumberForm = form_for_model(PhoneNumber)
->>> f = PhoneNumberForm({'phone': '(312) 555-1212', 'description': 'Assistance'})
->>> f.is_valid()
-True
->>> f.clean_data
-{'phone': u'312-555-1212', 'description': u'Assistance'}
-"""}