So,
a little example with dynamic forms, I hope you don't mind
pseudo-code, I don't feel like writing a working standalone example
and I cannot publish my application (its in Czech anyway ;) )
urls.py:
urlpatterns = patterns('some.app.views',
(r'wizard/$', 'my_wizard' ),
)
some/app/views.py:
from django import newforms as forms
from django.contrib.formtools import wizard
# we always have to supply at least one form
class FirstForm( forms.Form ):
item_list = forms.MultipleChoiceField( choices=[ (1,'ONE'), ( 2, 'TWO) ] )
# function that will generate a second form for us dynamically:
def get_second_form( items ):
# second form contains only labels for items selected in FirstForm
class SecondForm( forms.Form ):
def __init__( self, **kwargs ):
super( SecondForm, self ).__init__( **kwargs )
for i in items:
self.fields['label_%s' % i ] = forms.CharField( max_length=100 )
return SecondForm
# our wizard
class LabelManyWizard( wizard.Wizard ):
# after submitting the first form, create the second and append it
to form_list
def process_step( self, request, form, step ):
if step == 0:
form.full_clean()
self.form_list.append( get_second_form( form.clean_data['item_list'] ) )
super(LabelManyWizard, self ).process_step( request, form, step )
# when both forms are validly filled, do what you always wanted to do
def done( self, request, form_list ):
first, second = form_list
first.full_clean()
second.full_clean()
for i in first.clean_data['item_list']:
print "Label for item %s is %s" % ( i, second.clean_data[
'label_%s' % i ])
return HttpresponseRedirect( '/' )
# a little wrapper function - we could put the LabelManyWizard(
[FirstForm] ) into urls as a callable,
# but since it modifies its form_list it wouldn't work, hence this
little work around
# (this is only neccessary for dynamic wizards)
def my_wizard( request ):
wiz = LabelManyWizard( [FirstForm] )
return wiz( request )
------------- DONE -------------------
in order for this to work, you will need patch from ticket #3193 -
that is needed to pass the values from FirstForm.item_list because
normal as_hidden() wouldn't work for MultipleChoiceField...
looking forward to any comments
Honza
On 12/26/06, Honza Kr l <[EMAIL PROTECTED]> wrote:
Hello all,
I got bored during the holiday, so I put together a simple
implementation of django.contrib.formtools.wizard...
Features:
all data are kept in POST, nothing is stored on the server (this is
simply not very good for file uploads, but should be OK for the
majority)
security_hash from preview.py (by adrian) is used to ensure that
previously submitted data didn't change (if they have, returns to the
step in question), successful validation is only done once
old data are stored as individual fields not pickled by step
process_step() is called after successful validation of every step
or after verifying the step's hash.. it is not meant to change
something in the DB, it is meant as a hook to change the wizard's
state (for example after processing step 1, generate form for step 2).
That's also why it is called every time a form is submitted for all
submitted steps (except the current one if its invalid)
done() is THE method to override, it receives list of form instances
with valid data corresponding to the form_list, and the request
object, its output is returned directly...
Bugs:
there is no (or very little) way of introducing your own logic or
overriding some defaults (for example there is no way to supply the
step number vie URL), this will change (see TODO)
no documentation so far - I first want to make sure people are OK
with the state of things before I start doing some. However if someone
needs to know more than is written here to give it a try, let me
know...
Usage:
1) subclass it and supply a done() method, that will taje request
and a list of form instances with valid data
2) into urls enter:
( r'SOMETHING', MyWizard( [MyForm1, MyForm2, ...] ) ),
3) supply a template (default is test.html so far, or override it in
get_template() ) taht looks like this:
<form action="." method="POST">
FORM( {{ step }}): {{ form }}
previous_fields: {{ previous_fields }}
<input type="submit">
</form>
4) report bugs and enhancement requests here or to me personally
I am looking forward for any feedback
Thanks
Honza
On 12/20/06, rassilon <[EMAIL PROTECTED]> wrote:
>
> One slight modification, there was debugging code left in, which I've
> now fixed.
>
>
> > >
>
--
Honza Kr l
E-Mail: [EMAIL PROTECTED]
ICQ#: 107471613
Phone: +420 606 678585
--
Honza Kr l
E-Mail: [EMAIL PROTECTED]
ICQ#: 107471613
Phone: +420 606 678585
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