Ticket #6162: modelform-init.diff
| File modelform-init.diff, 13.2 KB (added by , 17 years ago) |
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django/newforms/models.py
262 262 return type.__new__(cls, name, bases, attrs) 263 263 264 264 class BaseModelForm(BaseForm): 265 def __init__(self, instance, data=None, files=None, auto_id='id_%s', prefix=None, 266 initial=None, error_class=ErrorList, label_suffix=':'): 267 self.instance = instance 265 def __init__(self, data=None, files=None, auto_id='id_%s', prefix=None, 266 initial=None, error_class=ErrorList, label_suffix=':', instance=None): 268 267 opts = self._meta 269 object_data = model_to_dict(instance, opts.fields, opts.exclude) 268 if instance is None: 269 self.instance = opts.model() 270 object_data = {} 271 else: 272 self.instance = instance 273 object_data = model_to_dict(instance, opts.fields, opts.exclude) 270 274 # if initial was provided, it should override the values from instance 271 275 if initial is not None: 272 276 object_data.update(initial) -
tests/modeltests/model_forms/models.py
156 156 ImproperlyConfigured: BadForm's base classes define more than one model. 157 157 158 158 159 # Old form_for_x tests #######################################################159 # Test valid ModelForms ####################################################### 160 160 161 161 >>> from django.newforms import ModelForm, CharField 162 162 >>> import datetime … … 167 167 >>> class CategoryForm(ModelForm): 168 168 ... class Meta: 169 169 ... model = Category 170 >>> f = CategoryForm( Category())170 >>> f = CategoryForm() 171 171 >>> print f 172 172 <tr><th><label for="id_name">Name:</label></th><td><input id="id_name" type="text" name="name" maxlength="20" /></td></tr> 173 173 <tr><th><label for="id_slug">Slug:</label></th><td><input id="id_slug" type="text" name="slug" maxlength="20" /></td></tr> … … 179 179 >>> print f['name'] 180 180 <input id="id_name" type="text" name="name" maxlength="20" /> 181 181 182 >>> f = CategoryForm( Category(),auto_id=False)182 >>> f = CategoryForm(auto_id=False) 183 183 >>> print f.as_ul() 184 184 <li>Name: <input type="text" name="name" maxlength="20" /></li> 185 185 <li>Slug: <input type="text" name="slug" maxlength="20" /></li> 186 186 <li>The URL: <input type="text" name="url" maxlength="40" /></li> 187 187 188 >>> f = CategoryForm( Category(),{'name': 'Entertainment', 'slug': 'entertainment', 'url': 'entertainment'})188 >>> f = CategoryForm({'name': 'Entertainment', 'slug': 'entertainment', 'url': 'entertainment'}) 189 189 >>> f.is_valid() 190 190 True 191 191 >>> f.cleaned_data … … 196 196 >>> Category.objects.all() 197 197 [<Category: Entertainment>] 198 198 199 >>> f = CategoryForm( Category(),{'name': "It's a test", 'slug': 'its-test', 'url': 'test'})199 >>> f = CategoryForm({'name': "It's a test", 'slug': 'its-test', 'url': 'test'}) 200 200 >>> f.is_valid() 201 201 True 202 202 >>> f.cleaned_data … … 210 210 If you call save() with commit=False, then it will return an object that 211 211 hasn't yet been saved to the database. In this case, it's up to you to call 212 212 save() on the resulting model instance. 213 >>> f = CategoryForm( Category(),{'name': 'Third test', 'slug': 'third-test', 'url': 'third'})213 >>> f = CategoryForm({'name': 'Third test', 'slug': 'third-test', 'url': 'third'}) 214 214 >>> f.is_valid() 215 215 True 216 216 >>> f.cleaned_data … … 225 225 [<Category: Entertainment>, <Category: It's a test>, <Category: Third test>] 226 226 227 227 If you call save() with invalid data, you'll get a ValueError. 228 >>> f = CategoryForm( Category(),{'name': '', 'slug': '', 'url': 'foo'})228 >>> f = CategoryForm({'name': '', 'slug': '', 'url': 'foo'}) 229 229 >>> f.errors 230 230 {'name': [u'This field is required.'], 'slug': [u'This field is required.']} 231 231 >>> f.cleaned_data … … 236 236 Traceback (most recent call last): 237 237 ... 238 238 ValueError: The Category could not be created because the data didn't validate. 239 >>> f = CategoryForm( Category(),{'name': '', 'slug': '', 'url': 'foo'})239 >>> f = CategoryForm({'name': '', 'slug': '', 'url': 'foo'}) 240 240 >>> f.save() 241 241 Traceback (most recent call last): 242 242 ... … … 253 253 >>> class ArticleForm(ModelForm): 254 254 ... class Meta: 255 255 ... model = Article 256 >>> f = ArticleForm( Article(),auto_id=False)256 >>> f = ArticleForm(auto_id=False) 257 257 >>> print f 258 258 <tr><th>Headline:</th><td><input type="text" name="headline" maxlength="50" /></td></tr> 259 259 <tr><th>Slug:</th><td><input type="text" name="slug" maxlength="50" /></td></tr> … … 286 286 ... class Meta: 287 287 ... model = Article 288 288 ... fields = ('headline','pub_date') 289 >>> f = PartialArticleForm( Article(),auto_id=False)289 >>> f = PartialArticleForm(auto_id=False) 290 290 >>> print f 291 291 <tr><th>Headline:</th><td><input type="text" name="headline" maxlength="50" /></td></tr> 292 292 <tr><th>Pub date:</th><td><input type="text" name="pub_date" /></td></tr> … … 298 298 >>> class RoykoForm(ModelForm): 299 299 ... class Meta: 300 300 ... model = Writer 301 >>> f = RoykoForm( w, auto_id=False)301 >>> f = RoykoForm(auto_id=False, instance=w) 302 302 >>> print f 303 303 <tr><th>Name:</th><td><input type="text" name="name" value="Mike Royko" maxlength="50" /><br />Use both first and last names.</td></tr> 304 304 … … 309 309 >>> class TestArticleForm(ModelForm): 310 310 ... class Meta: 311 311 ... model = Article 312 >>> f = TestArticleForm( art, auto_id=False)312 >>> f = TestArticleForm(instance=art, auto_id=False) 313 313 >>> print f.as_ul() 314 314 <li>Headline: <input type="text" name="headline" value="Test article" maxlength="50" /></li> 315 315 <li>Slug: <input type="text" name="slug" value="test-article" maxlength="50" /></li> … … 331 331 <option value="2">It's a test</option> 332 332 <option value="3">Third test</option> 333 333 </select> Hold down "Control", or "Command" on a Mac, to select more than one.</li> 334 >>> f = TestArticleForm( art, {'headline': u'Test headline', 'slug': 'test-headline', 'pub_date': u'1984-02-06', 'writer': u'1', 'article': 'Hello.'})334 >>> f = TestArticleForm({'headline': u'Test headline', 'slug': 'test-headline', 'pub_date': u'1984-02-06', 'writer': u'1', 'article': 'Hello.'}, instance=art) 335 335 >>> f.is_valid() 336 336 True 337 337 >>> test_art = f.save() … … 347 347 ... class Meta: 348 348 ... model = Article 349 349 ... fields=('headline', 'slug', 'pub_date') 350 >>> f = PartialArticleForm( art, {'headline': u'New headline', 'slug': 'new-headline', 'pub_date': u'1988-01-04'}, auto_id=False)350 >>> f = PartialArticleForm({'headline': u'New headline', 'slug': 'new-headline', 'pub_date': u'1988-01-04'}, auto_id=False, instance=art) 351 351 >>> print f.as_ul() 352 352 <li>Headline: <input type="text" name="headline" value="New headline" maxlength="50" /></li> 353 353 <li>Slug: <input type="text" name="slug" value="new-headline" maxlength="50" /></li> … … 370 370 >>> class TestArticleForm(ModelForm): 371 371 ... class Meta: 372 372 ... model = Article 373 >>> f = TestArticleForm( new_art, auto_id=False)373 >>> f = TestArticleForm(auto_id=False, instance=new_art) 374 374 >>> print f.as_ul() 375 375 <li>Headline: <input type="text" name="headline" value="New headline" maxlength="50" /></li> 376 376 <li>Slug: <input type="text" name="slug" value="new-headline" maxlength="50" /></li> … … 393 393 <option value="3">Third test</option> 394 394 </select> Hold down "Control", or "Command" on a Mac, to select more than one.</li> 395 395 396 >>> f = TestArticleForm( new_art,{'headline': u'New headline', 'slug': u'new-headline', 'pub_date': u'1988-01-04',397 ... 'writer': u'1', 'article': u'Hello.', 'categories': [u'1', u'2']} )396 >>> f = TestArticleForm({'headline': u'New headline', 'slug': u'new-headline', 'pub_date': u'1988-01-04', 397 ... 'writer': u'1', 'article': u'Hello.', 'categories': [u'1', u'2']}, instance=new_art) 398 398 >>> new_art = f.save() 399 399 >>> new_art.id 400 400 1 … … 403 403 [<Category: Entertainment>, <Category: It's a test>] 404 404 405 405 Now, submit form data with no categories. This deletes the existing categories. 406 >>> f = TestArticleForm( new_art,{'headline': u'New headline', 'slug': u'new-headline', 'pub_date': u'1988-01-04',407 ... 'writer': u'1', 'article': u'Hello.'} )406 >>> f = TestArticleForm({'headline': u'New headline', 'slug': u'new-headline', 'pub_date': u'1988-01-04', 407 ... 'writer': u'1', 'article': u'Hello.'}, instance=new_art) 408 408 >>> new_art = f.save() 409 409 >>> new_art.id 410 410 1 … … 416 416 >>> class ArticleForm(ModelForm): 417 417 ... class Meta: 418 418 ... model = Article 419 >>> f = ArticleForm( Article(),{'headline': u'The walrus was Paul', 'slug': u'walrus-was-paul', 'pub_date': u'1967-11-01',419 >>> f = ArticleForm({'headline': u'The walrus was Paul', 'slug': u'walrus-was-paul', 'pub_date': u'1967-11-01', 420 420 ... 'writer': u'1', 'article': u'Test.', 'categories': [u'1', u'2']}) 421 421 >>> new_art = f.save() 422 422 >>> new_art.id … … 429 429 >>> class ArticleForm(ModelForm): 430 430 ... class Meta: 431 431 ... model = Article 432 >>> f = ArticleForm( Article(),{'headline': u'The walrus was Paul', 'slug': u'walrus-was-paul', 'pub_date': u'1967-11-01',432 >>> f = ArticleForm({'headline': u'The walrus was Paul', 'slug': u'walrus-was-paul', 'pub_date': u'1967-11-01', 433 433 ... 'writer': u'1', 'article': u'Test.'}) 434 434 >>> new_art = f.save() 435 435 >>> new_art.id … … 443 443 >>> class ArticleForm(ModelForm): 444 444 ... class Meta: 445 445 ... model = Article 446 >>> f = ArticleForm( Article(),{'headline': u'The walrus was Paul', 'slug': 'walrus-was-paul', 'pub_date': u'1967-11-01',446 >>> f = ArticleForm({'headline': u'The walrus was Paul', 'slug': 'walrus-was-paul', 'pub_date': u'1967-11-01', 447 447 ... 'writer': u'1', 'article': u'Test.', 'categories': [u'1', u'2']}) 448 448 >>> new_art = f.save(commit=False) 449 449 … … 474 474 <Category: Third test> 475 475 >>> cat.id 476 476 3 477 >>> form = ShortCategory( cat, {'name': 'Third', 'slug': 'third', 'url': '3rd'})477 >>> form = ShortCategory({'name': 'Third', 'slug': 'third', 'url': '3rd'}, instance=cat) 478 478 >>> form.save() 479 479 <Category: Third> 480 480 >>> Category.objects.get(id=3) … … 486 486 >>> class ArticleForm(ModelForm): 487 487 ... class Meta: 488 488 ... model = Article 489 >>> f = ArticleForm( Article(),auto_id=False)489 >>> f = ArticleForm(auto_id=False) 490 490 >>> print f.as_ul() 491 491 <li>Headline: <input type="text" name="headline" maxlength="50" /></li> 492 492 <li>Slug: <input type="text" name="slug" maxlength="50" /></li> … … 690 690 >>> class PhoneNumberForm(ModelForm): 691 691 ... class Meta: 692 692 ... model = PhoneNumber 693 >>> f = PhoneNumberForm( PhoneNumber(),{'phone': '(312) 555-1212', 'description': 'Assistance'})693 >>> f = PhoneNumberForm({'phone': '(312) 555-1212', 'description': 'Assistance'}) 694 694 >>> f.is_valid() 695 695 True 696 696 >>> f.cleaned_data -
docs/modelforms.txt
24 24 ... model = Article 25 25 26 26 # Creating a form to add an article. 27 >>> article = Article() 28 >>> form = ArticleForm(article) 27 >>> form = ArticleForm() 29 28 30 29 # Creating a form to change an existing article. 31 30 >>> article = Article.objects.get(pk=1) 32 >>> form = ArticleForm( article)31 >>> form = ArticleForm(instance=article) 33 32 34 33 Field types 35 34 ----------- … … 166 165 The ``save()`` method 167 166 --------------------- 168 167 169 Every form produced by ``ModelForm`` also has a ``save()`` method. This 170 method creates and saves a database object from the data bound to the form. 171 A subclass of ``ModelForm`` also requires a model instance as the first 172 arument to its constructor. For example:: 168 Every form produced by ``ModelForm`` also has a ``save()`` 169 method. This method creates and saves a database object from the data 170 bound to the form. A subclass of ``ModelForm`` can accept an existing 171 model instance as the keyword argument ``instance``; if this is 172 supplied, ``save()`` will update that instance. If it's not supplied, 173 ``save()`` will create a new instance of the specified model:: 173 174 174 175 # Create a form instance from POST data. 175 >>> a = Article() 176 >>> f = ArticleForm(a, request.POST) 176 >>> f = ArticleForm(request.POST) 177 177 178 178 # Save a new Article object from the form's data. 179 179 >>> new_article = f.save() 180 180 181 # Create a form to edit an existing Article. 182 >>> a = Article.objects.get(pk=1) 183 >>> f = ArticleForm(instance=a) 184 181 185 Note that ``save()`` will raise a ``ValueError`` if the data in the form 182 186 doesn't validate -- i.e., ``if form.errors``. 183 187 … … 201 205 ``save_m2m()`` to save the many-to-many form data. For example:: 202 206 203 207 # Create a form instance with POST data. 204 >>> a = Author() 205 >>> f = AuthorForm(a, request.POST) 208 >>> f = AuthorForm(request.POST) 206 209 207 210 # Create, but don't save the new author instance. 208 211 >>> new_author = f.save(commit=False) … … 222 225 For example:: 223 226 224 227 # Create a form instance with POST data. 225 >>> a = Author() 226 >>> f = AuthorForm(a, request.POST) 228 >>> f = AuthorForm(request.POST) 227 229 228 230 # Create and save the new author instance. There's no need to do anything else. 229 231 >>> new_author = f.save() … … 277 279 manually set anyextra required fields:: 278 280 279 281 instance = Instance(required_field='value') 280 form = InstanceForm( instance, request.POST)282 form = InstanceForm(request.POST, instance=instance) 281 283 new_instance = form.save() 282 284 283 285 instance = form.save(commit=False)