We need to code a 5-step form wizard. The first step should let you
select products with various options, validate them, then add those
items to a basket, then proceed when you are ready. The next few
steps are straightforward - personal details, delivery details,
payment.
The FormWizard in 1.3 makes all the later steps very easy, but we're
fighting it on step 1. Has anyone done anything like this?
In more detail, Step 1 should have buttons on it for "add current item
to basket" (which has to validate a couple of fields with standard
error messages behaviour), "proceed to checkout", plus a 'delete'
button for each element in the basket. The problem is that
FormWizard by default moves you to the next step when validation on
Form 1 succeeds. Ideally I'd want to validate the new item and then
redisplay the current page, or (if they hit a Delete button) amend the
hidden variables storing the basket and redisplay the same page.
I'm looking at two options
1. Write a form-level clean() method which will proceed if the user
hit 'checkout' (i.e. if there is a key-value pair on the request
matching that button's name/value), and will fail if they hit 'add to
basket', but in the process of failing will create some extra numeric-
prefixed hidden fields to store the new basket item, then redisplay
the form. In this case the Wizard code will not need touching.
2. Overriding the __call__ method of the 1.3 FormWizard, which
contains the following, to not always jump forward a step, but instead
maybe see if the form has a 'next_step' or 'finished' attribute. Then
our Form for the first page could indicate that it is not ready to
move forwards yet.
if form.is_valid():
self.process_step(request, form, current_step)
next_step = current_step + 1
3. Any other ideas?
FormWizard is very nice in our case as it adds some very useful
security and validation features. I'm hoping someone will tell me
there is an easy way around this!
Thanks,
Andy
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