Class FormPreview

x.__init__(...) initializes x; see x.__class__.__doc__ for signature

Overrides: object.__init__

(inherited documentation)

Given a first-choice name, adds an underscore to the name until it reaches a name that isn't claimed by any field in the form.

This is calculated rather than being hard-coded so that no field names are off-limits for use in the form.

Validates the POST data. If valid, displays the preview page. Else, redisplays form.

Validates the POST data. If valid, calls done(). Else, redisplays form.

Given captured args and kwargs from the URLconf, saves something in
self.state and/or raises Http404 if necessary.

For example, this URLconf captures a user_id variable:

    (r'^contact/(?P<user_id>\d{1,6})/$', MyFormPreview(MyForm)),

In this case, the kwargs variable in parse_params would be
{'user_id': 32} for a request to '/contact/32/'. You can use that
user_id to make sure it's a valid user and/or save it for later, for
use in done().

Calculates the security hash for the given Form instance.

This creates a list of the form field names/values in a deterministic order, pickles the result with the SECRET_KEY setting and takes an md5 hash of that.

Subclasses may want to take into account request-specific information such as the IP address.