Add a get_context(self, request, step) method to FormWizard

[Rob Hudson <treborhudson@…>]

If you want to simply add context to a step of a FormWizard there are currently two documented ways, both of which have shortcomings...

1. Override render_template. The problem with this is quite a bit is happening in the to the variables in the context. The user mostly has to copy/paste the code, get it right, and hope this method doesn't change out from underneath him for future releases, just to add context.

2. Override process_step. If the above turns the user's stomach, this seems like the next best place. The problem, as noted in the documentation, is that "... this method is called every time a page is rendered for all submitted steps." If you are only adding context, not processing anything, this can result in a pretty heavy load, for example if you are doing database calls to get a list of objects to display on a certain step.

I'm proposing adding a method just for adding context to any given step, and make it called only when the step is rendered.

[Russell Keith-Magee]

Not necessarily sold on adding a method as the solution, but the idea (allowing for extra_context) is certainly valid.

[Jannis Leidel]

Superseded by #9200.