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Since version trunk 288 you can create dummy databases with SQLDB(None) and they can be used to generate form. Here is how.

Define the following helper function:

def form_factory(*a): return SQLFORM(SQLDB(None).define_table(*a))

and now you can create a controller like the following

def index():
         form=form_factory('myform',
                SQLField('name','string',requires=IS_NOT_EMPTY()),
                SQLField('age','integer',requires=IS_INT_IN_RANGE(0,150)),
                SQLField('image','upload'))
         if form.accepts(request.vars,session):
             response.flash='form accepted'
             ### do something with form.vars, perhaps redirect somewhere else
         elif form.errors:
             response.flash='errors in form'
         else:
             response.flash='please fill the form'
         return dict(form=form)

the form object, returned by form factory, behaves like a SQLFORM except that there is no insert because there is no DB. Notice that the image has been stored in a temporary file under uploads and its new name is in `form.vars.image_newfilename`

AlterEgo

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