Django snippets: Wrapper-function Pattern

def wrapper_function(*args, **kwargs):
    arg_names = original_function.func_code.co_varnames
    params = dict(zip(arg_names, args))
    params.update(kwargs)
    
    # now you have args and kwargs collected to the dictionary params
    # you can read and modify them here and then call the original function
    
    return original_function(**params)

More like this

Other approach of making middleware (by decorators) by diverman 11 months, 1 week ago
object-oriented generic views by carljm 3 years, 5 months ago
Owner required decorator by polarbear 3 years, 7 months ago
Resolve URLs to view name and args/kwargs by fahhem 1 year, 2 months ago
A templatetag to insert the output of another view (or local URL) by jamesgpearce 2 years, 7 months ago

This is an example how to create a wrapping function that can read all incoming arguments, do something with them and then call the original function. This pattern works well with generic views.

Note that wrapper function accepts arguments in both ways: as a list of unnamed arguments and as a list of keyword-value pairs.

A real-world example:

def published_object_list(request, *args, **kwargs):
    arg_names = original_function.func_code.co_varnames
    params = dict(zip(arg_names, args))
    params.update(kwargs)

    params['queryset'] = params['queryset'].filter(is_published=True)
    if request.is_ajax():
        params['template_name'] = "ajax/" + params['template_name']

    return object_list(request, **params)

Author:: Archatas
Posted:: April 14, 2010
Language:: Python
Django Version:: 1.1
Tags:: function view wrapper
Score:: 0 (after 0 ratings)

Django snippets

Wrapper-function Pattern

More like this

Tools

Comments

Snippets

About