Hello,
I am trying to do a model with a file that shouldn't be modified. But the comment of the file can be.
Here is what I did, but we cannot modify the comment. How can I test if a new file (using the browse button) as been sent and in this case only, create a new instance of the model ? If no upload of a new file, update the comment.
admin.py
class CGUAdminForm(forms.ModelForm):
class Meta:
model = ConditionsUtilisation
def clean_file(self):
if self.instance and self.instance.pk is not None:
raise forms.ValidationError(_(u'You cannot modify the file. Thank you to create a new instance.'))
# do something that validates your data
return self.cleaned_data["file"]
class CGUAdmin(admin.ModelAdmin):
form = CGUAdminForm
admin.site.register(ConditionsUtilisation, CGUAdmin)
models.py
class ConditionsUtilisation(models.Model):
date = models.DateField(_(u'Date d\'upload'), editable=False, auto_now_add=True)
comment = models.TextField(_(u'Commentaire de modification'))
file = models.FileField(_(u'CGU'), upload_to='subscription/cgu/', storage=CGUFileSystemStorage())