How can I implement custom cleaning in Django forms?
You can implement custom cleaning in Django forms by overriding the clean()
method or defining custom field clean methods.
Can you give me an example of overriding the clean method?
Sure! Here's a simple example:
class MyForm(forms.Form):
name = forms.CharField(max_length=100)
def clean_name(self):
name = self.cleaned_data.get('name')
if 'badword' in name:
raise forms.ValidationError('Inappropriate word used!')
return name
What if I want to clean multiple fields?
You can override the clean()
method to validate multiple fields together. Here's an example:
def clean(self):
cleaned_data = super().clean()
field1 = cleaned_data.get('field1')
field2 = cleaned_data.get('field2')
if field1 and field2 and field1 == field2:
raise forms.ValidationError('Field1 and Field2 cannot be the same!')
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