Oh, i guess i didn't define my models using the "through" relationship. Thanks for the help! :)
On Tue, Jun 22, 2010 at 4:10 PM, euan.godd...@googlemail.com < euan.godd...@gmail.com> wrote: > If i understand you correctly you've got a couple of solutions. You > can define a "through" relationship between Student and Teacher usinf > Techer_profile as the "through" table (http://docs.djangoproject.com/ > en/dev/topics/db/models/#extra-fields-on-many-to-many-relationships<http://docs.djangoproject.com/%0Aen/dev/topics/db/models/#extra-fields-on-many-to-many-relationships> > ). > Then you should be able to do: > > teachers = Teacher.objects.filter(student__name="Jonny") > > I think the ORM should take care of this query for you and select only > those teachers. > > Euan > > On Jun 22, 3:39 am, Jx <l3earl3ea...@gmail.com> wrote: > > Hi, > > > > i recently encountered a problem due to inefficient performance of > > django pagination. After researching, i realized that there is a need > > to use django database queries when dealing with django-pagination as > > "LIMIT" will automatically be added. This is useful especially when > > dealing with huge chunk of data. > > > > However, i came across a problem where i could not figure out how to > > use django database query to extract the data. > > > > Lets say i have 3 tables, "Teachers", "Students", and > > "Teachers_profile" with a one-many relationship. > > > > The Teacher table contains teacher_id,.....(teacher info) > > The Student table contains student_id,name,...(student info) > > The Teacher_profile table is the link between the 2 tables. It > > contains teacher_id,student_id > > > > How can i use django database query with filters to extract the > > teachers who is managing a student named "Jonny" for example? > > > > i'm not sure if this is an easy question, but i'm having some trouble > > in solving it :( > > -- > 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<django-users%2bunsubscr...@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.
