Question

在表单中，我有某些字段，但未经过正确验证。我希望覆盖django验证并改为使用自己的验证。当我覆盖imageViews.add(subImage)方法时，字段clean()已经填充了来自错误验证字段的错误。我应该覆盖哪种方法，这些错误产生在哪里？

通过覆盖self.errors和类似方法，只能实现对django默认验证的扩展。我想阻止这种默认验证的发生。

编辑：尝试验证员
这是我试过的：

clean()

甚至没有调用那些验证器。似乎错误搜索过程在253 def validate_gallery(value): 254 print 'validate galley' 255 return True 256 257 def validate_cover_photo(value): 258 print 'validate_cf' 259 return True 260 261 cover_photo_widget = SelectWithDefaultOptions(attrs={ 262 'class': 'chosen-select-no-single', 263 'id': 'select-cover-photo', 264 'data-placeholder': 'Select Cover Photo', 265 'style': 'width: 200px;', 266 'tabindex': '-1', 267 }); 268 269 gallery_widget = SelectWithDefaultOptions(attrs={ 270 'class': 'chosen-select-no-single', 271 'id': 'select-galley', 272 'data-placeholder': 'Select Gallery', 273 'style': 'width: 200px;', 274 'gallery-select': '', 275 'tabindex': '-1', 276 'organisator-profile-specific': '', 277 }); 278 279 gallery = forms.ChoiceField(widget = gallery_widget, validators = [validate_gallery]) 280 cover_photo = forms.ChoiceField(widget = cover_photo_widget, validators = [validate_cover_photo])函数调用结束，这在调用任何验证器之前发生。

编辑：发布全班

validate()

在240 def validate_gallery(value): 241 print 'validate galley' 242 return True 243 244 def validate_cover_photo(value): 245 print 'validate_cf' 246 return True 247 248 class EventDetailForm(NgFormValidationMixin, NgModelForm): 249 def __init__(self, *args, **kwargs): 250 super(EventDetailForm, self).__init__(*args, **kwargs) 251 self.fields['end_date'].required = False 252 self.fields['description'].required = False 253 self.fields['start_date'].input_formats = DATE_TIME_INPUT_FORMATS 254 self.fields['end_date'].input_formats = DATE_TIME_INPUT_FORMATS 255 256 arguments_length = len(args) 257 if arguments_length > 0: 258 post_data = args[0] 259 self.old_title = post_data.get('old_title', None) 260 261 cover_photo_widget = SelectWithDefaultOptions(attrs={ 262 'class': 'chosen-select-no-single', 263 'id': 'select-cover-photo', 264 'data-placeholder': 'Select Cover Photo', 265 'style': 'width: 200px;', 266 'tabindex': '-1', 267 }); 268 269 gallery_widget = SelectWithDefaultOptions(attrs={ 270 'class': 'chosen-select-no-single', 271 'id': 'select-galley', 272 'data-placeholder': 'Select Gallery', 273 'style': 'width: 200px;', 274 'gallery-select': '', 275 'tabindex': '-1', 276 'organisator-profile-specific': '', 277 }); 278 279 gallery = forms.ChoiceField(widget = gallery_widget, validators = [validate_gallery]) 280 cover_photo = forms.ChoiceField(widget = cover_photo_widget, validators = [validate_cover_photo]) 281 282 class Meta: 283 model = Event 284 fields = ('title', 'description', 'end_date', 'start_date') 285 widgets = { 286 'title': forms.TextInput(attrs={ 287 'editable-detail': '', 288 }), 289 'description': forms.TextInput(attrs={ 290 'class': 'panel-body', 291 'id': 'event-description-editable', 292 'editable-detail': '', 293 }), 294 'start_date': DateTimeWidget(attrs = { 295 'class': 'datetimepicker col-xs-6', 296 'id': 'event-start-date-editable', 297 'editable-detail': '', 298 }), 299 'end_date': DateTimeWidget(attrs = { 300 'class': 'datetimepicker col-xs-6', 301 'id': 'event-end-date-editable', 302 'editable-detail': '', 303 }), 304 } 305 306 def clean(self): 307 cleaned_data = self.cleaned_data 308 309 print self.errors 310 311 return cleaned_data 312 313 def save(self, commit=True): 314 old_title = self.old_title 315 event = Event() 316 317 cover_photo_title = self.cleaned_data['cover_photo'] 318 cover_photo = Photo.objects.filter(title=cover_photo_title) 319 320 gallery_title = self.cleaned_data['gallery'] 321 gallery = Gallery.objects.filter(title=gallery_title) 322 323 event.title = self.cleaned_data['title'] 324 event.description = self.cleaned_data['desription'] 325 event.start_date = self.cleaned_date['start_date'] 326 event.end_date = self.cleaned_data['end_date'] 327 event.cover_photo = cover_photo 328 event.gallery = gallery 329 330 if commit: 331 event.save() 332 333 return event 334我可以看到错误存在，clean()永远不会被执行。

Answer 1

为什么不编写自己的Field类，它有自己的验证方法，因为它在验证器本身之前被调用：

class MyCustomChoiceField(ChoiceField):

    def validate(self, value):
        <do something to validate your field>

然后使用它：

gallery = MyCustomChoiceField(widget = gallery_widget)

Answer 2

除非字段的验证依赖于另一个字段的值，否则最好是在表单字段定义中设置验证器函数。

Django documentation的示例：

from django import forms

class MyForm(forms.Form):
    even_field = forms.IntegerField(validators=[validate_even])

如果验证不是特定于表单，您甚至可以在模型中设置验证器。

Answer 3

您可以覆盖调用以清理数据的def clean_YOUR_VARIABLE_NAME方法

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例如：

class EmailForm(forms.Form):
    your_email = forms.EmailField(label='Your E-mail address', required=True)

    def clean_your_email(self):
        data = self.cleaned_data['your_email']
        # Check some condition over data
        # raise ValidationError for bad results
        # else return data

Django表单 - 如何覆盖字段验证

3 个答案: