Hello, I read mentioned thread and still can't figure out how I can pass arbitrary values to widgets. OK, I'll rephrase question (it was "task" in the previous email): how I can make widget that takes two values out of the model without changing ModelForm behavior or doing separate query in the widget?
Probably it is bad mailing list to ask such questions, should I go to devel instead? Thanks, Serge. On Tue, Feb 10, 2009 at 12:21 AM, Alex Gaynor <alex.gay...@gmail.com> wrote: > > > On Mon, Feb 9, 2009 at 5:18 PM, Serge S. Koval <serge.ko...@gmail.com>wrote: > >> >> Hello, >> >> I'm fairly new Django user, but have some background experience with >> other frameworks. Sorry if this topic was discussed before, but I was >> not able to find any mention of it. >> >> My question is related to architectural decisions of the forms, >> fields and widgets. >> >> At the moment in Django, all "incoming" data is processed by the >> widget and clean by the field. Data flow: raw data -> widget -> field -> >> form. >> However, reverse process is different: data -> form -> widget >> data. As you can see, field does not play and role in reverse data >> conversion. >> >> Let's examine simple task. ModelForm calls model_to_dict() to >> initialize form fields with initial data. In case of models data is >> their id's. >> But what if one will want to develop widget that requires more >> than just a model id? For example: str(model) and model.id at the same >> time? There are not so many options how it can be done right now: or >> derive from ModelForm and override it's data gathering behavior >> (rewrite model_to_dict()) or run extra query in the widget itself (which >> is not optimal). >> >> Possible naive solution: if it would be possible to make field work in >> _both_ directions, it would be awesome. >> If field will know that it works with models (like ModelForm related >> fields), it will be responsible for cleaning data to the >> widget-appropriate format. >> >> It is my two cents. I don't know if somebody already tried to make it >> work this way of there were some reasons not to do this way... I don't >> know. >> >> Thanks, >> Serge. >> >> -- >> Best regards, >> Serge mailto:serge.ko...@gmail.com >> >> >> >> > I would recommend searching the dev list for a thread titled: "Controlling > form/widgets output". > > Alex > --~--~---------~--~----~------------~-------~--~----~ 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 django-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
