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Django / Forms

clean method

Learn clean method in Django with a dedicated explanation, a topic-specific example, edge guidance, and a mastery check.

12 min read • Intermediate
django-034.py
python 
def clean(self):
    data = super().clean()
    if data.get("due_at") and data.get("issued_at") and data["due_at"] < data["issued_at"]:
        raise forms.ValidationError("Due date cannot precede issue date")
    return data
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