gestiojeux/accounts/forms.py

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from django.forms import ModelForm, ValidationError
from .models import User
class AccountSettingsForm(ModelForm):
error_css_class = "errorfield"
class Meta:
model = User
fields = ["public_name"]
def clean_public_name(self):
public_name = self.cleaned_data["public_name"]
public_name = public_name.strip()
if (
User.objects.filter(public_name=public_name)
.exclude(pk=self.instance.pk)
.exists()
):
raise ValidationError("Un autre compte utilise déjà ce nom ou ce pseudo.")
return public_name