On Apr 28, 10:48 am, mixit <s...@blueyonder.co.uk> wrote: > Using an Inline in an Admin form: > The main Form model has various text fields, and one Inline, using a > custom little form of its own. > The Inline model has an parentFK pointing to the parent Form model and > has an different FK to a large table, which is displayed as a popup > (or dropdown) menu with ALL its entries - all works perfectly :o) > > I want to filter the Inline's FK popup menu (because its too large) by > the ID of the parent model instance (plus various other factors). > > Working part of the Implementation: > A "populated" (i.e. already 'saved') inline has an instance, thus I > can access the parentFK from the Inline via 'self.instance.parentFK" > and filter the popup menu by filtering its queryset... again works > perfectly :o) > > Problem: > The Inline has 'extra: 1' set, to give me one empty extra Inline. > This empty extra however has NO instance before saving (i.e. > self.instance is None), therefore I cannot use the above technique to > get to its parent model, so I cannot filter its popup menu as before : > ( > > Horrible hack workaround: > use formfield_for_foreignkey(), > hunt for the popup field name, > grab the request.META['PATH_INFO'] > regexp it and pull out the parent model ID. > finally, use the parent model ID thus acquired to filter the popup > menu queryset. > > Question: > Is there no other way to access the parent Form model ID from an > unsaved, "empty" Inline? > > I've spent a couple of days wading through the Admin code but can't > find anyway for an empty, "extra" Inline to know anything about the > form model it is embedded in... > > Can anyone advise if there is some nifty field, attribute or function > that I am missing? > regards > si >
The inline formset itself (rather than its forms) has an "instance" attribute which refers to the instance of the parent form. -- 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.
