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from dajngo import forms
from .models import Article #contains title and article field
class ArticleForm(forms.ModelForm):
class Meta:
model = Article
field = ['title', 'article']
def clean(self):
data = self.cleaned_data
title = data.get('title')
queryset = Article.objects.filter(title__icontains=title)
if queryset.exists():
self.add_error("title is taken")
return data