Hi, I was migrating some django project recently from django 1.0.4 to 1.2. In Django 1.2/1.1 I found that if model have 'evaluate' attribute then one will get exception in admin edit page for that model if the page contains inline forms with related models:
Exception Value: 'Shipper' object has no attribute 'prepare' Exception Location: .../django/db/models/sql/expressions.py in __init__, line 12 It is caused by the fact that add_filter function in django/db/models/ sql/query.py does such a check: ... 1005. elif hasattr(value, 'evaluate'): 1006. # If value is a query expression, evaluate it 1007. value = SQLEvaluator(value, self) ... 1008. having_clause = value.contains_aggregate ... The problem is that "value" in this case is Shipper model which in have "evaluate" method so it is recognized as query expression here. I share about this cause I thought that maybe it is worth noting in documentation, or this check should be changed somehow? Greetings, -- You received this message because you are subscribed to the Google Groups "Django developers" group. To post to this group, send email to django-develop...@googlegroups.com. To unsubscribe from this group, send email to django-developers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-developers?hl=en.
