Carlos, Thank you for this! Your solution is what I am looking for,but for some reason I get an error message: "NameError: name 'university' is not defined" <http://dpaste.com/ 278024/>
Figuring this could an issue with Python and not Django, i added university ='' to the top. The validate command returned the message: Error: One or more models did not validate: socialmediacourses.departments: 'university' has a relation with model , which has either not been installed or is abstract. socialmediacourses.university: Reverse query name for m2m field 'departments' clashes with field 'departments.university'. Add a related_name argument to the definition for 'departments'. what am I doing wrong? On Nov 21, 4:23 am, Carlos Daniel Ruvalcaba Valenzuela <clsdan...@gmail.com> wrote: > Depends on you requirements, you could have used a Foreign Key to the > University on the Department model and marking it as required, thus > there cannot be a Department without university and set the > related_name property on the ForeignKey to the "departments" so you > can access University.departments property for the list of > departments. > > You may not want this if you only want to have 1 kind of department > which will be linked to many universities, but I see this may not be > the case, thus your models may end like this: > > class departments(models.Model): > > GENDER = ((u'M', u'Male'),(u'F', u'Female'),) > > university = models.ForeignKey(university, related_name="departments") > name = models.CharField(max_length=60) > head_name = models.CharField(max_length=60) > head_email = models.EmailField(max_length=60) > head_gender = models.CharField(max_length=2, choices=GENDER) > > Regards, > Carlos Ruvalcaba > > > > On Sat, Nov 20, 2010 at 6:19 PM, Bruno Amaral <m...@brunoamaral.eu> wrote: > > I have been trying to create a database for Universities, Departments > > and Courses. > > > The idea is that a University has many departments, which in turn have > > one or more courses. > > > So far, this model works:http://dpaste.com/277850/ > > > With one caveat, it allows a department to exist without a University > > linked to it. > > > I am at a loss here, even after reading over all the documentation I > > could find on the website, does anyone have an idea on what I am doing > > wrong, or where I should look for a solution? > > > -- > > 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 > > athttp://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.
