On Tue, 2007-03-27 at 11:18 -0700, Ben Stahl wrote: > Aren't you duplicating information with the newforms, violating the > DRY principle? What I mean is, aren't we separately creating most or > all of the same fields for a form as for the model whose data will be > bound to the form? Why can't a form be instantiated automatically when > passed a model (maybe with flags for which fields are enabled)? Or > better yet, bind the form to a model (or model instance), which would > at all times keep the form fields in sync with the model. You could > have a parameter for each model field like form=True or whatever if > that field should be included in a form. > > Maybe I'm not correctly understanding the relationships here though, > or missing something. Sorry if that's the case, I am new at Django, > but so far I love it.
Along with the other answers you've received about using form_for_instance and form_for_model, I'd like to point another piece of design logic behind newforms (and even oldforms). This is purely informational and maybe you already realise it: It's not always the case that a form consists of data for only one model. In my own experience, the forms I build collect data that is ultimately split between multiple models and/or the form fields are munged prior to being insert into a model -- for example, a comma-separated list of strings becomes multiple tag instances in the database. This sort of usage isn't something that I see discussed on this list a lot (the splitting tags is, but data -> multiple forms isn't), which makes me think that by the time you need that, form processing isn't that hard, or it isn't that common (I suspect the former). Tying form creation any more tightly to models that via the utility methods already provided would make the more generic form usage style a bit harder. Regards, Malcolm --~--~---------~--~----~------------~-------~--~----~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
