Thanks for that. Here's where I'm confused: 1. In your suggested 'else' you say to get the values from the form. Where do I create the form? Do I do it there (as well as in the GET branch)? I'd like to create the form only one time. 2. You say I do a form.process in the GET branch? I thought I do form.process() only on a POST. Sorry for my rookie questions. After some reading (and before reading your most recent post) I thought I should do this (comments welcome):
form = FORM(...) # don't insert any values if form.accepts(...): # process request.post_vars... redirect(...) elif form.errors: # error processing else: # Pre-populate form elements return dict(form=form) Or am I off base here? Thanks. On Wednesday, October 31, 2012 6:45:36 PM UTC-6, Niphlod wrote: > > If you cached the values no distinction between post or get matters. you > fetch them one-time only. > If you don't want to cache them, it's another story > > Basic workflow > > - requesting values > - form = FORM() > - users press submit (form.process) > - re-requesting values (your unfortunate case) > - process the values sent by the form > > But, you are afraid that requesting values from db 2 times is too much > (sound like premature optimization, but anyway, let's go with it). > You did > > if post_vars > process the values sent > else > fetch values > form = FORM() > > This leaves you with open doors to XSRF and double submissions (not using > form.process or form.accepts). > You can still skip the fetch part if the page has been POSTed (don't need > for default values at that point), so the logic goes this way > > if page is GETted > fetch values > form = FORM() > user press submit (form.process) > else (page is POSTed) > don't fetch the data > process the values from the form > > --
