Inherit your forms from model from this ModelForm and it will check all the database fields with unique=True in is_valid()
.
This is a hack around #5736. It is actually a part of a grand problem mentioned in #4895. You can use this hack until the issue is fully resolved.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | from django import newforms as forms
class CleanUniqueField:
"""Wrap the clean_XXX method."""
def __init__(self, form, name):
try:
self.clean = getattr(form, 'clean_' + name)
except AttributeError:
self.clean = None
self.form = form
self.name = name
def __call__(self):
if self.clean:
result = self.clean()
else:
result = self.form.cleaned_data[self.name]
queryset = self.form._meta.model.objects
if self.form.instance.pk:
queryset = queryset.exclude(pk=self.form.instance.pk)
try:
queryset.get(**{self.name: result})
except self.form._meta.model.DoesNotExist:
return result
else:
raise forms.ValidationError(
u'The %s is already in use.' % self.name)
class ModelForm(forms.ModelForm):
"""A hack around the Django ticket #4895."""
def __init__(self, *args, **kwargs):
super(ModelForm, self).__init__(*args, **kwargs)
for field in self._meta.model._meta.fields:
if field.unique and field.name in self.base_fields:
setattr(self,
'clean_' + field.name,
CleanUniqueField(self, field.name))
|
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Comments
line 30 self.name doesn't handle i18n dunno why
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from django import newforms as forms
class CleanUniqueField: """Wrap the clean_XXX method."""
class ModelForm(forms.ModelForm): """A hack around the Django ticket #4895."""
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I've not commented what the code above is the verbose_name is introduced because self.name isn't the real name to display in the error message
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Thanks visik7, this is a valid point indeed. Is verbose_name unicode safe? I am confused a little because you put a #FIXME there.
How about
Will it solve the issue? Visik7 do you have a way of testing it?
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