#4136: CharField(null=True, blank=True, unique=True)
-------------------------------------+-------------------------------------
     Reporter:  David Cramer         |                    Owner:
  <dcramer@…>                        |  aashu_dwivedi
         Type:  Bug                  |                   Status:  assigned
    Component:  Forms                |                  Version:  1.3-rc
     Severity:  Normal               |               Resolution:
     Keywords:                       |             Triage Stage:  Accepted
    Has patch:  1                    |      Needs documentation:  1
  Needs tests:  1                    |  Patch needs improvement:  1
Easy pickings:  0                    |                    UI/UX:  0
-------------------------------------+-------------------------------------

Comment (by anentropic):

 @collinanderson

 Can you elaborate?  Simply adding that to the model `save()` method alone
 seems to be insufficient because commonly we are using a `ModelForm` and
 that calls the instance's `validate_unique` method, which raises
 `ValidationError` before the `save` method is reached...

--
Ticket URL: <https://code.djangoproject.com/ticket/4136#comment:34>
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