Thanks Ryan for the reply. Another idea that came to me is .... can we make an input like a list? as in <input type="text" name=alotofinput[] ...
all the text inputs will have a similar name then iterate over them using POST and then pump the data into the database? Will something like that work? On Sun, Nov 16, 2008 at 6:01 PM, Ryan Witt <[EMAIL PROTECTED]> wrote: > > I've recently had a situation where I needed to create dynamic forms > and corresponding code to handle them. > > One thing that you should know about python is that there's nothing > special about classes, you can take a collection of attributes and > methods and use them to create a new class on-the-fly using python's > type() function. You can use this to dynamically build a form class > with a new field. > > My roommate wrote a great blog post on how to do build classes > dynamically (http://askawizard.blogspot.com/2008/09/metaclasses-python- > saga-part-4_30.html), which you should read before attempting this. > > Once you understand what that is talking about (or not), you end up > writing some code like this: > > If you want this form to be dynamic: > > class MyDynamicForm(Form): > foo = CharField(max_len = 100) > bar = IntegerField() > def clean_foo(self): > value = self.cleaned_data['foo'] > if value != 'foo': > raise ValidationError('foo is not foo!') > def clean_bar(self): > value = self.cleaned_data['bar'] > if value != 42: > raise ValidationError('wrong answer') > > You could build it programatically with: > > # Our base classes (which you could build programatically if you > wanted) > bases = (Form,) > > # Our class attributes > attys = { > 'foo' : CharField(max_len = 100), > 'bar' : IntegerField(), > } > > # This returns a clean method built from some parameters > def general_clean(name, correct_value, error_text): > def inner(self): > value = self.cleaned_data[name] > if value != correct_value: > raise ValidationError(error_text) > return inner > > # Now add the clean methods. You could just define methods and assign, > but this illustrates generating them programatically. > for name, correct_value, error_text in ( > ('foo', 'foo', 'foo is not foo!'), > ('bar', 42, 'wrong answer'), > ): > attys['clean_' + name] = general_clean(name, correct_value, > error_text) > > # Now, to create the dynamic class, you need the following > incantation: > DynamicForm = getattr(Form, '__metaclass__', type)('DynamicForm', > bases, attys) > > # That only creates the *class*, we still have to create an instance > form = DynamicForm({'foo': 'foo', 'bar': 42}) > > Does this help? It would let you dynamically add elements and handlers > to the form that django is aware of, thus you get all the benefits of > using the form framework. Let me know if this is a bit thick and I'll > be happy to explain it and perhaps blog a more coherent example. > > --Ryan > > > > > > -- Low Kian Seong blog: http://lowkster.blogspot.com --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
