Hi,
I've been programming Python for 10 years now, mainly algorithms. I found
out about Web2py 4 months ago, and have been intensively learning it since.
So thanks for all contributors!
I'm developing a web interface where a user can create a new idea campaign.
Because the campaign has lots of parameters which can change per campaign,
I've decided to store most of the settings to the database as a dictionary
using Pickle. I want to cut the creation of the campaign into phases to
keep the visible form short.
Based on the documentation (excellent book) I've decided to use Session to
store the value from each phase and only store the variables into the
database after the user has filled all forms. I use the same page to show
different forms to keep the files to a minimum.
My problems are the following:
1) How to use SQLFORM.dictform with a dictionary so that it shows menu
options (and checklist) to some of the settings (e.g.
IS_IN_SET(['one','two'])). The dictionary is created during the process, so
the database doesn't have no values in it to fetch.
2) Am I doing to this properly (see code below)?
Here's my code (I've simplified it to make it more understandable)
Model:
db.define_table('campaign',
Field('name', unique=True),
Field('pagename', unique=True),
Field('description','text'),
Field('created_by','reference auth_user', default=auth.user_id),
Field('type', requires=IS_IN_SET(['open','private'])),
Field('general_settings','text', filter_in=(lambda x: pickle.dumps(x)),
filter_out=(lambda s: s and pickle.loads(s)),default=None))
Controller:
if request.args(0,cast=str) == 'prev':
try:
if session.step > 0:
session.step -= 1
else:
redirect(URL('index'))
except:
session.step = 0
#determine in which step
if not session.step:
session.step = 0
if session.step == 0:
form = SQLFORM(db.campaign, fields=['name','description'])
form.add_button('Cancel',URL('index'))
if form.validate():
session.step1_variables = form.vars
session.step = 1
redirect(URL('new_campaign'))
elif session.step == 1:
form = SQLFORM(db.campaign, fields=['pagename'])
form.add_button('Prev',URL('new_campaign',args='prev'))
if form.validate():
session.step2_variables = form.vars
session.step = 2
redirect(URL('new_campaign'))
elif session.step == 2:
settings_dict = dict(privacy="", registration="self")
form = SQLFORM.dictform(settings_dict)
form.add_button('Prev',URL('new_campaign',args='prev'))
form.custom.widget.privacy['requires'] =
IS_IN_SET(['open','closed'])
if form.validate():
session.step3_variables = form.vars
session.step = 3
redirect(URL('new_campaign'))
elif session.step == 3:
form = FORM.confirm('Are you sure?')
if form.accepted:
session.step = 0
#Store all variables to the database
#Redirect to the new campaign page
else:
redirect(URL('index'))
return dict(form=form, step=session.step)
View:
{extend 'layout.html'}}
{{if step == 0:}}
<h2>{{=T('Create new campaign')}}</h2>
{{=T('Welcome to XXX. Create a campaign using this simple wizard')}}
{{elif step == 1:}}
<h2>{{=T('Create new campaign')}}</h2>
{{=T('Please add your pagename')}}
{{elif step == 2:}}
<h2>{{=T('Create new campaign')}}</h2>
{{=T('Make some settings')}}
{{elif step == 3:}}
<h2>{{=T('Create new campaign')}}</h2>
{{=T('Here are all your settings. Click the button the accept them')}}
{{pass}}
{{=form}}
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