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How can I implement custom cleaning in Django forms?

An example of an AI chatbot conversation about Django forms and custom cleaning methods.

😀
You

How can I implement custom cleaning in Django forms?

MagicBuddy
MagicBuddy

You can implement custom cleaning in Django forms by overriding the clean() method or defining custom field clean methods.

😀
You

Can you give me an example of overriding the clean method?

MagicBuddy
MagicBuddy

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
😀
You

What if I want to clean multiple fields?

MagicBuddy
MagicBuddy

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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