I dont think they do. The only time i use raw sql + joins is for performance... eg:
When you have a model and for each instance of that model it has a reverse foreignkey relationship where you would have to call: <related_model_name>_set.all() in a for loop thus making heaps of sql queries. There are 3rd party addons for that: http://code.google.com/p/django-selectreverse/ Does a good job of avoiding the n+1 problem for most situations. Hope this helps cheers sam. On Wed, Aug 11, 2010 at 4:36 PM, Daniel Roseman <dan...@roseman.org.uk> wrote: > On Aug 11, 2:28 am, Phlip <phlip2...@gmail.com> wrote: >> > orders = Order.objects.filter( >> > pk=42, >> > order_items__product='whiteboards' >> > ) >> >> > Is this not what you want? >> >> We made a feeb attempt at that and gave up. Thanks! I will try it next. >> >> The next question, if it works, will be how to values_list() a field >> from a child record; it might follow that notation. >> >> Could I trouble you for its home page? Googling for [django queryset >> join] gives zillions of newbs trying simple queries... > > http://docs.djangoproject.com/en/1.2/topics/db/queries/#lookups-that-span-relationships > > -- > DR. > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To post to this group, send email to django-us...@googlegroups.com. > To unsubscribe from this group, send email to > django-users+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/django-users?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-us...@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
