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Apr 20th, 2014
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  1. class YourModelAdminForm(forms.ModelForm):
  2. def clean_your_field(self):
  3. if format_is_not_valid:
  4. raise forms.ValidationError('Format is not valid')
  5.  
  6.  
  7. class YourModelAdmin(admin.ModelAdmin):
  8. form = YourModelAdminForm
  9.  
  10.  
  11. admin.site.register(YourModel, YourModelAdmin)
  12.  
  13. class YourModel(models.Model):
  14. your_field = models.FileField(validators=[your_validator])
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