On Jan 12, 2008 1:17 PM, Ian J Cottee <[EMAIL PROTECTED]> wrote:
>
> I've actually written a couple of basic apps in Django but today I
> thought I'd play around with doc tests and realised I didn't know as
> much as I thought I did. This is all done with latest trunk.
>
> Let's take a model definition that has just the following:
>
> class PartType(models.Model):
> code = models.CharField(max_length=15)
> description = models.CharField(max_length=50)
>
> We can play around with this in the shell and do this:
>
> >>> pt = PartType()
> >>> pt.validate()
> {'code': [u'This field is required.'], 'description': [u'This field is
> required.']}
>
> Which is what we expect. These two fields are required.
>
> >>> pt.code='ACODE'
> >>> pt.description='A description'
> >>> pt.validate()
> {}
> >>> pt.save()
>
> All good, it validates and saves. Now let's give it something a little
> longer than it can't cope with.
>
> >>> pt.code='THISISLONGERTHANFIFTEENCHARS'
> >>> pt.validate()
> {}
>
> Odd - it validates but we know our code field can only be 15 characters.
>
> >>> pt.save()
> Traceback (most recent call last):
> File "<console>", line 1, in <module>
> File
> "/usr/local/lib/python2.5/site-packages/django/db/models/base.py", line
> 238, in save
> db_values + self._meta.pk.get_db_prep_lookup('exact', pk_val))
> File
> "/usr/local/lib/python2.5/site-packages/django/db/backends/util.py",
> line 18, in execute
> return self.cursor.execute(sql, params)
> ProgrammingError: value too long for type character varying(15)
>
> BANG!
>
> I'd be expecting for Django to tell me before postgres does, that the
> field does not validate. Am I misunderstanding something?
>
Did you miss the "This is an experimental feature!" note at the top of:
http://www.djangoproject.com/documentation/models/validation/
?
Last I recall seeing it mentioned here, model validation is still a work in
progress. Meaning I don't believe everything is supposed to work just yet.
Karen
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