Re: Mutually exclusive fields in model validation

[Daniel Roseman]

On Sep 15, 11:19 pm, Sonal Breed  wrote:
> Thanks a lot Cliff, I implemented it in a similar manner, just wanted
> to know if we
> have anything like validation rules a la Access.
>
> Thanks again,
> Sincerely,
> Sonal.

Not yet. Honza Kral's Google Summer of Code project for model
validation is due to be merged reasonably soon though, so this will be
in version 1.2 - or in trunk at some earlier point if you don't want
to wait that long.
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Re: Mutually exclusive fields in model validation

[Sonal Breed]

Thanks a lot Cliff, I implemented it in a similar manner, just wanted
to know if we
have anything like validation rules a la Access.

Thanks again,
Sincerely,
Sonal.

On Sep 15, 3:08 pm, "J. Cliff Dyer"  wrote:
> Override the save method on your model, something like:
>
> class MyModel(models.Model):
>     field1 = models.TextField(blank=True)
>     field2 = models.TextField(blank=True)
>
>     def save(self):
>         if (self.field1 and self.field2):
>             raise ModelValidationError, "only one can live"
>         elif (not self.field1 and not self.field2):
>             raise ModelValidationError, "one must live"
>         else:
>             super(MyModel, self).save()
>
> Untested code.  I don't remember if ModelValidationError exists, and I
> don't know if you need to tweak the signature on your save method, but
> that should get you pointed in the right direction.
>
> Cheers,
> Cliff
>
> On Tue, 2009-09-15 at 14:33 -0700, Sonal Breed wrote:
> > Hi all,
>
> > I have a model wherein I want to put a validation as
> > You must enter Field1 or Field2, but not both.
>
> > This model is at the back end and not visible through forms.
> > How do I accomplish it?
>
> > Thanks,
>
> > Sincerely,
> > Sonal
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Re: Mutually exclusive fields in model validation

[J. Cliff Dyer]

Override the save method on your model, something like:

class MyModel(models.Model):
field1 = models.TextField(blank=True)
field2 = models.TextField(blank=True)

def save(self):
if (self.field1 and self.field2):
raise ModelValidationError, "only one can live"
elif (not self.field1 and not self.field2):
raise ModelValidationError, "one must live"
else:
super(MyModel, self).save()

Untested code.  I don't remember if ModelValidationError exists, and I
don't know if you need to tweak the signature on your save method, but
that should get you pointed in the right direction.

Cheers,
Cliff


On Tue, 2009-09-15 at 14:33 -0700, Sonal Breed wrote:
> Hi all,
> 
> I have a model wherein I want to put a validation as
> You must enter Field1 or Field2, but not both.
> 
> This model is at the back end and not visible through forms.
> How do I accomplish it?
> 
> Thanks,
> 
> Sincerely,
> Sonal
> > 


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Mutually exclusive fields in model validation

[Sonal Breed]

Hi all,

I have a model wherein I want to put a validation as
You must enter Field1 or Field2, but not both.

This model is at the back end and not visible through forms.
How do I accomplish it?

Thanks,

Sincerely,
Sonal
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