On Jul 14, 8:09 am, Sam Walters <mr.sam...@gmail.com> wrote: > Hi Django world > I keep getting problems accessing and storing data in foreignkey and > one-to-one relationships. > Error is basically of the form: > "AttributeError > Exception Value: 'DirectoryAdmin' object has no attribute 'abbrev'" > > The models.py file is here:http://pastebin.com/mcc4ee45 > The SQL it produces is here:http://pastebin.com/m5b70bce5 > > I don't think the problem is in here but you can see what I am trying to > achieve. At the moment i am just trying to save multiple records in 'class > DirectoryType' which relate through a foreignkey to Directory. > > MAIN CULPRIT: > Views.pyhttp://pastebin.com/m10eac87f > > I seem to be able to .save() new instances of Directory, DirectoryAdmin, > DirectoryType > > However i cant get Directory to associate with multiple instances of > DirectoryType or even DirectoryAdmin. > At a more fundamental level the .add() method says: > > 'DirectoryType' object has no attribute 'add' > > And if i try to see an attribute in another table: > > var = dirdir.admin.abbrev #error: 'DirectoryAdmin' object has no attribute > 'name' > > However i seem to be able to access the database for id's. > var = dirdir.admin.id #works > > Any help would be greatly appreciated as i dont know what is going wrong > beyond this.
I think you have misunderstood how foreign key fields work. The model that declares a ForeignKey field is the *many* side of the 1-to-many relationship - ie the way you have it, each Directory has a single DirectoryType, and a DirectoryType has multiple Directories. If this is right, the misunderstanding is how you then set each side of the relationship. From a Directory, you just do dir.directoryType = x where x is a DirectoryType instance. But that does mean your loop doesn't make sense. However if you do want mulitple directorytypes for each directory, the foreignkey field needs to live on the directorytype, and you would then do dir.directorytype_set.add(x). -- 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-users@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 -~----------~----~----~----~------~----~------~--~---
