ModelQueryForm - does it exist?

Has anyone written a ModelQueryForm class that subclasses
BaseModelForm and implements a query function

The idea would be to have a convenience form class that you can use to
create quick, model based, search forms.

The view would be mostly like view based around ModelForm CRUD -
except instead of calling clean/save methods on the bound form, one
would call a 'query' method that would return a queryset, which the
form could then add to the render context to the template as
"results".

-Preston

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