I've written and am using a BitFlagsField, but hadn't yet shared it since I haven't been able to get the ORM lookup stuff working the way I want it. I've pasted my code-in-progress at dpaste: http://dpaste.com/hold/96435/
The current code includes a model BitFlagsField, a form MultiCheckboxField, and a MultiCheckboxWidget. These three components are tested and work well together for displaying a set of bit flags as a set of checkboxes in the admin or a ModelForm. What I haven't yet been able to get working is the full range of ORM lookups with bitwise AND and OR. I'd really welcome others' eyes on this piece, as I'm not the most familiar with the ORM internals. AFAICT, it's not possible (outside of modifying Django) to redefine the semantics (or the generated SQL) of the various __ lookup types, as Craig wants to do (and I also was originally hoping to do). You can override get_db_prep_lookup, but that only allows you to mangle your field values, not change the SQL operators used. Thus, I think, Malcolm's recommendation of using a custom Q-like object. At the bottom of the dpaste there is some in-progress code trying to make this work, but I haven't gotten very far with it yet. I can do lookups for the presence of a given flag, but I can't yet AND or OR those lookups together; I wouldn't be surprised if I'm going about it completely backwards. Hope this code helps get the ball rolling. I'd love to see this available and working really well. If it's useful I'd be glad to put this code into Google code and give commit access to interested others; just mail me if you'd like to do this. Carl --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django developers" group. To post to this group, send email to django-developers@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-developers?hl=en -~----------~----~----~----~------~----~------~--~---
