Hi, I'm trying to use Model Managers to write some per model functionality. I have a Book model that needs to be able to convert some of it's members into SoldBook items.
I want to be able to do: Book.objects.filter(supplier='Jones').convert_sold() I'm basing my code on http://stackoverflow.com/questions/2163151?tab=votes#tab-top but my model looks like this: from custom_queryset import CustomQuerySetManager #see link above from django.db.models.query import QuerySet class Book(models.Model): objects = CustomQuerySetManager() class QuerySet(QuerySet): def convert_sold(self): for book in self.all(): sb = SoldBook() sb.title = book.title #etc sb.save() book.delete() but when I call it with Book.objects.filter(supplier='Jones').convert_sold() File "/home/user/webapps/django/lib/python2.5/django/db/models/sql/ compiler.py", line 843, in as_sql placeholder = field.get_placeholder(val, self.connection) TypeError: get_placeholder() takes exactly 2 arguments (3 given) Unfortunately I'm using django trunk revision 11728 (5 months old?) because webfaction haven't fixed their GIS database support for more recent djangos :-( Any idea how to fix this would be greatly appreciated. -- 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.
