Custom Django filters in Google App Engine

Jun
19
2008

Custom Django filters in Google App Engine

You want to create your own custom Django filters in App Engine without running a whole Django stack? Here's how in a few lines of code.

First create a specific python file to hold your custom filters at the root of your application. In my case I use customfilters.py like this:

import re
from google.appengine.ext import webapp
 
register = webapp.template.create_template_register()
 
def escapeimg(body):
	return re.sub(r'&lt;img (.*)/&gt;', '[IMG]', body)
 
register.filter(escapeimg)

Then in your main application source file, call the following line outside of the main() definition, for example just after your modules loading:

"""Load custom Django template filters"""
webapp.template.register_template_library('customfilters')

You should then be able to use the new filters you registered in customfilters.py straight away in any of your Django templates without any % load foobar % call

Written by w00kie in: Work stuff, internet | Tags: app engine, code, google

7 Comments »

Comment | August 15, 2008

Sav

Wow!!! Thanks for this post, it was a huge, huge help.
Comment | September 11, 2008

Steve

Thanks very much for this.
Comment | December 5, 2008

Maluku

Awesome, thank you very much
Comment | January 4, 2009

Big Barry Banossi

I’ve just discovered custom filters thanks to this posts – and DAMN aren’t they powerful! Solved a bunch of stuff for me and made everything so small, neat and simple. Thank you HEAPS for this info.
March 2, 2009
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Comment | May 1, 2009

dH

Thanks a lot, works like charm!
Comment | June 5, 2009

Tyson

This was great. Thanks, just what I needed. Very concise. Cheers!