Model Validation - Best practices

Hi Guys,

I just been working my way through Django, top framework by
the way.

Anyways I just wondering if any one can shed some light
model
validation,

It seems the only validations are either through the
newforms or
simple validation through the fields.  But there doesn't
seem to be
any bussiness rule validation functions for models.  My
concern is
that validations should really be kept in the model and not
in
forms.

So I was just wondering how people go about validating
models.

Cheers,
Cameron Singe


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On 24-Oct-07, at 10:10 AM, Camo wrote:

> So I was just wondering how people go about validating
models.

overide the save() method and add your own business rules in
the model

-- 

regards
kg
http://lawgon.livejourn
al.com
http://nrcfosshelpline
.in/web/



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On Wed, 2007-10-24 at 04:40 +0000, Camo wrote:
> Hi Guys,
> 
> I just been working my way through Django, top
framework by the way.
> 
> Anyways I just wondering if any one can shed some light
model
> validation,
> 
> It seems the only validations are either through the
newforms or
> simple validation through the fields.  But there
doesn't seem to be
> any bussiness rule validation functions for models.  My
concern is
> that validations should really be kept in the model and
not in
> forms.
> 
> So I was just wondering how people go about validating
models.

At the moment this is work in progress. There is some
development going
on to finish up model-aware validation and complete some
earlier work on
model validation. At that time, you'll be able to call
my_model.validate() and have things work similarly to how
they do with
newforms.

Right now, there's a validate() method on the Model class,
but it is
incomplete and not recommended for production use.

In the interim, doing things in the save() method is
possible, although
it's not a brilliantly nice design, since save() should
never raise
validation errors and, if it does, you won't get feedback
to, say, the
admin interface or places like that. But it's the workaround
you need to
do at the moment.

Regards,
Malcolm

-- 
Atheism is a non-prophet organization. 
http://www.pointy-s
tick.com/blog/


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