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Simple View Middleware to allow a Prefilter

Author:
tclineks
Posted:
April 22, 2008
Language:
Python
Version:
.96
Tags:
middleware process_view prefilter beforefilter
Score:
2 (after 2 ratings)

This allows you to define a 'prefilter' function in your view modules which will be invoked before any view in that same. This provides an easy place to decorate the request or modify arguments.

For simplicity it doesn't allow configuration of the name of the prefilter function. I also skipped recursing into parent modules since that's somewhat edgecase.

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from sys import modules

class ViewModulePrefilter(object):
    """Simple Django View Middleware to allow a prefilter function in view modules"""
    def process_view(self, request, view_func, view_args, view_kwargs):
        module = modules[view_func.__module__]
        prefilter_func_name = 'prefilter'
        if hasattr(module, prefilter_func_name):
            prefilter_func = getattr(module, prefilter_func_name)
            response = prefilter_func(request, view_func, view_args, view_kwargs)
            if response:
                return response

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