On Wed, Nov 4, 2009 at 10:50 PM, DavodM <david.mcc...@gmail.com> wrote: > > Hello, > > I have a many to many relationship between 'Projects' and 'Tags' in my > app. > > In the admin screen I would like to be able to use the > filter_horizontal interface for adding/editing from both sides of the > relationship but I can only seem to get it for one or the other. > > I have tried the solution here > > http://stackoverflow.com/questions/1339409/, > > Which involves creating the projects_tags table manually in models > using a foreign key to each side (as you would do manually in SQL) and > then referring to it as the model for an AdminInline. > This allows me to display an inline to edit both sides of the > relationship but I don't seem to be able to display the inlines as > filter_horizontal because the relationships are now one to many.
You're getting two different terms confused here. filter_horizontal is a single-widget representation for a m2m field. This can't be applied in the reverse direction - an m2m widget is only automatically generated on model that defines the relation. On the other hand, Inlines are a way of representing objects related to a given object by displaying a sub-form for each related object. In the workaround you describe, the 'related object' is the row describing the intermediate table - i.e., the 'relationship' is actually the object, not the object on the other side of the m2m. > I have also tried a different approach from the documentation here > > http://docs.djangoproject.com/en/dev/ref/contrib/admin/#working-with-many-to-many-models > > Which says to use Tag.projects.through as the model for the > AdminInline > But I get an error saying that Tag.projects.through does not exist. (I > have checked and the SQL for the sqlite database and it is adding the > projects_tags table). > > So either I would like a way to display an inline from a many to many > relationship as filter_horizontal, or I need help getting the through > attribute to work. The through attribute was added last night to the trunk version of Django. Unfortunately, I forgot to add the "new in development version" marker to the documentation. I've made the change to the documentation source; it should be updated online shortly. However, as noted previously - the through model won't help you get the filter_horizontal widget. The through model is just a cleaner way of doing an Inline for m2m relations. If you want to have a filter_horizontal widget for the reverse direction of an m2m relation, you will need to define a custom ModelForm that defines a widget for the reverse relation, and provide that form to the ModelAdmin definition. Yours, Russ Magee %-) --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
