django-wizard 0.1.2

A wizard that helps to control page flow.

Django Wizard

Django wizard uses Step classes to control page flow.

To create a wizard, you need a url route defined that is going to point to a
view and take a step parameter, like this:

url(r'^(?P<step>[a-zA-Z]+)?$', views.NewWizard.as_view(), name='new_wizard'),

That view then must instantiate the wizard passing it the url name, and a list of steps.
Then the wizard's handle_request method should be called and returned with the request
and the current step name (From the url)

IE:
def my_view(request, step):
Wizard('new_wizard', [('StepOne', mysteps.StepOne), ('StepTwo', mysteps.StepTwo)])
return wizard.handle_request(request, step)


The wizard also has a defaulted navigation_opts argument that can be passed in the __init__
navigation options are a dictionary with a key of a string that will map to a field in
the Request, and the value is an int. These tell the wizard what direction to go and how far
in which scenarios.

The defaults are:

wizard_save: 0
wizard_continue: 1
wizard_previous: -1
wizard_next: 1

The view can also set a few additional things on the wizard:

set_redirect_args(*args, **kwargs)
- use this to tell the wizard what it needs to privode to django's reverse function
when doing redirects

set_step_init_args(*args, **kwargs)
- use this to supply additional arguments to your step class __init__'s

set_common_template_args(dict)
- use this to add stuff that will always be available in all of your wizard created
templates

A Step class is just an object that must the following methods

display
- only takes self as an argument and returns the object that should be
passed to django's template engine

save
- only takes self as an argument and returns nothing

template
- only takes self as an argument and must return the template object to be used
by the wizard to render the response

IE: return loader.get_template('some_template_file.html')

prereq
- only takes self as an argument and can raise a wizard.PrereqMissing when
an error occurs in the page flow

when each step is instantiated by the wizard it is passed any url args or kwargs that
may be present

The wizard then adds the following properties

_key = which is the string used as the step's key
_wizard = is the current instance of the wizard
_current_step is the key of the current_step

PrereqMissing is an exception that can modify the standard page flow
- the __init__ accepts an optional step key, a request and a message

- if the step key is provided, the wizard will redirect to that step

- if a request and message are provided it will add the message to
django's messaging framework

SaveStepException is an exception that can be raised in the save method that
lets the wizard know that the step could not be saved and needs to be repeated