bmodels.Contact.objects.select_related('IR_contact','consumer_contact','program','consumer').filter(consumer__file=file).order_by('-
date')Yeah, I figured as much. -S On Feb 17, 4:34 pm, Jeremy Dunck <[email protected]> wrote: > Erm, and the queryset creation. > > Also, people are en route to PyCon, so responses may be a bit slow. > > On Wed, Feb 17, 2010 at 3:30 PM, [email protected] <[email protected]> wrote: > >http://dpaste.com/160722/ > > > class Contact(models.Model): > > program = models.ForeignKey('agency.Program') > > consumer = > > models.ForeignKey('consumer.Consumer',null=True,blank=True) > > date = models.DateField('Contact Date') > > notes = models.TextField() > > date_added = models.DateTimeField(editable=False) > > method = > > models.CharField(max_length=10,choices=choices.CONTACT_METHOD,\ > > null=True,blank=True) > > > # consumer_contact > > class Contact(basemodels.Contact): > > base = models.OneToOneField(basemodels.Contact, > > parent_link=True,related_name="consumer_contact") > > service = models.ForeignKey(Service) > > confidential = models.BooleanField(default=False,help_text='These > > notes will not be visible to general staff') > > group = models.ForeignKey(Group,null=True,blank=True) > > group_contact = > > models.ForeignKey('consumer.GroupContact',blank=True,null=True) > > > def save(self, *args, **kwargs): > > super(Contact, self).save(*args,**kwargs) > > > class Meta: > > permissions = ( > > ("allow_confidential", "Can make contacts confidential"), > > ) > > > #ir_contact > > class Contact(basemodels.Contact): > > > base=models.OneToOneField(BaseContact,parent_link=True,related_name='IR_contact') > > IR=models.ForeignKey(IR,blank=True,null=True) > > > referred_from=models.ForeignKey(ReferralSource,related_name='IR_referred_from') > > > referred_to=models.ManyToManyField(ReferralSource,related_name='IR_referred_to') > > > information=models.ManyToManyField(Information,verbose_name='Information > > Requested') > > > On Feb 17, 4:15 pm, Jeremy Dunck <[email protected]> wrote: > >> We'll need your model definitions in order to help much. > > >> On Wed, Feb 17, 2010 at 2:54 PM, Steve <[email protected]> wrote: > >> > Hello all, > > >> > I believe select_related is creating some extraneous joins in situations > >> > where one is joining child models from a base model (model inheritance). > > >> > Take the following SQL generated (dpaste here, probably more readable > >> >http://dpaste.com/160677/) > > >> > ==== > > >> > SELECT (fields) FROM `base_contact` > > >> > LEFT OUTER JOIN `consumer_consumer` ON (`base_contact`.`consumer_id` = > >> > `consumer_consumer`.`id`) # ok > > >> > INNER JOIN `agency_program` ON (`base_contact`.`program_id` = > >> > `agency_program`.`id`) # ok > > >> > LEFT OUTER JOIN `consumer_contact` ON (`base_contact`.`id` = > >> > `consumer_contact`.`base_id`) # ok > > >> > INNER JOIN `base_contact` T5 ON (`consumer_contact`.`base_id` = T5.`id`) > >> > # > >> > ?!? > > >> > # These next two are questionable, since they are joined on a LEFT OUTER > >> > (so > >> > they may potentially not be there) > > >> > INNER JOIN `consumer_service` ON (`consumer_contact`.`service_id` = > >> > `consumer_service`.`id`) > > >> > INNER JOIN `consumer_servicetype` ON (`consumer_service`.`type_id` = > >> > `consumer_servicetype`.`id`) > > >> > LEFT OUTER JOIN `IR_contact` ON (`base_contact`.`id` = > >> > `IR_contact`.`base_id`) # ok > > >> > INNER JOIN `base_contact` T9 ON (`IR_contact`.`base_id` = T9.`id`) # ?!? > > >> > WHERE `consumer_consumer`.`file` = 06-1757 ORDER BY `base_contact`.`date` > >> > DESC > > >> > ==== > > >> > There are two joins I simply can't explain (marked "?!?"). Removing them > >> > gives me my expected results. select_related in on case seems to > >> > correctly > >> > create a LEFT OUTER, but then follows up by creating an unwanted INNER. > > >> > Keep in mind I made a note about the 'questionable' join above, but even > >> > removing that entirely creates the same problem. > > >> > I'll be glad to file a ticket, if the issue is something other than my > >> > ignorance. > > >> > -Steve > > >> > -- > >> > You received this message because you are subscribed to the Google Groups > >> > "Django developers" group. > >> > To post to this group, send email to [email protected]. > >> > To unsubscribe from this group, send email to > >> > [email protected]. > >> > For more options, visit this group at > >> >http://groups.google.com/group/django-developers?hl=en. > > > -- > > You received this message because you are subscribed to the Google Groups > > "Django developers" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]. > > For more options, visit this group > > athttp://groups.google.com/group/django-developers?hl=en. -- You received this message because you are subscribed to the Google Groups "Django developers" group. 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