apparently i pasted that in there twice. woops...
On Aug 19, 8:57 am, ocgstyles <[EMAIL PROTECTED]> wrote:
> Hi saeb,
>
> I believe you misunderstand the purpose of select_related(). When
> used, it does the extra database work to retrieve related objects at
> the beginning, rather than when you try to access them. Here's an
> example:
>
> # in this example, notice how __dict__ isn't populated with the
> _site_cache until AFTER we manually refer to the site (f.site.domain)
>
> >>> from feedback.models import Feedback
> >>> f = Feedback.objects.get(pk=1)
> >>> f.__dict__
>
> {'display_name': u'Keith', 'site_id': 1L, 'comments': u'YAY', 'id':
> 1L, 'pub_date': datetime.datetime(2008, 8, 1, 23, 35, 7)}>>> f.site.domain
> u'shopfha.com'
> >>> f.__dict__
>
> {'display_name': u'Keith', 'site_id': 1L, 'comments': u'hello', 'id':
> 1L, '_site_cache': <Site: example.com>, 'pub_date':
> datetime.datetime(2008, 8, 1, 23, 35, 7)}
>
> # in this example, notice how __dict__ is now populated with the
> _site_cache without first referring to the site
>
> >>> from feedback.models import Feedback
> >>> f = Feedback.objects.select_related().get(pk=2)
> >>> d.__dict__
>
> {'display_name': u'Paul', 'site_id': 1L, 'comments': u"hello", 'id':
> 2L, '_site_cache': <Site: example.com>, 'pub_date':
> datetime.datetime(2008, 8, 1, 23, 37, 41)}
>
> HTH
>
> Keith
>
> On Aug 18, 11:50 pm, saeb <[EMAIL PROTECTED]> wrote:
>
> > Sorry to ask a stupid question, but following is my basic model
> > structure. I want to create a custom manager for a class which has a
> > foreignKey to another class. And to call that manager function in list
> > display to display all the related properties. Am I doing it right? I
> > don't see any associated fields when I execute the following in shell.
> > Please help me with this issue, Thanks.
>
> > class privateAcctManager(models.Manager):
> > def show_acct(self):
> > return super(privateAcctManager,
> > self).get_query_set().select_related()
>
> > class privateAcct(models.Model):
> > id = models.ForeignKey(Acct)
> > obj = privateAcctManager()
>
> > def all_acct(self):
> > return self.obj.show_acct()
>
> > class Meta:
> > db_table= 'private_acct'
>
> > class PublicAcct(models.Model):
> > id = models.ForeignKey(Acct)
> > class Meta:
> > db_table= 'public_acct'
>
> > class Account(models.Model):
> > name = models.TextField()
> > balance = models.decimalfield()
>
> > class PrivateAcctAdmin(admin.modelAdmin):
> > list_display =( id, all_acct.name , all_acct.balance)
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