> -----Original Message-----
> From: django-users@googlegroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of M.Ganesh
> Sent: 06 June 2008 14:19
> To: django-users@googlegroups.com
> Subject: Help - m2m field in my model
>
>
> Hi,
>
> Excuse me for the dumb question.
>
> My model :
>
> class phonenumber(models.Model):
> location_type = models.ForeignKey(location_type)
> location_description = models.CharField(max_length=50, blank=True)
>
> def __unicode__(self):
> if self.location_description:
> retval = self.location_description + ' - '
> else:
> retval = self.location_type + ' - '
> return retval
>
> class Meta:
> app_label = 'contacts'
>
>
> I get an error saying :
> TypeError at /contacts/phonenumber/
> unsupported operand type(s) for +: 'location_type' and 'str'
>
> How do I get the location_type __unicode__ for the fk?
self.location_type is a ForeignKey object (linked to your location_type
model subclass) not a string, so you either need to do
self.location_type.foo where foo is an attribute of the location_type class
with type str, or define a __str__ method of the location_type object.
If you call your phonenumber class PhoneNumber, and your location_type class
LocationType, it will help make it clearer what is an object and what is a
variable. In particular this line will be clearer:
location_type = models.ForeignKey(LocationType)
(location_type is variable, LocationType is class name)
Hope this is not confusing (/ wrong!!).
Em
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