Python-сообщество

from applications.blog.models import Article
from django.contrib import admin

def content_handler(source):
    from html5lib import HTMLParser
    from html5lib.treebuilders import getTreeBuilder
    
    parser = HTMLParser(tree=getTreeBuilder('dom'))
    doc = parser.parse(source)
    
    for el in doc.getElementsByTagName('code'):
        if el.hasAttribute('lang'):
            lang = el.getAttribute('lang').strip()
            el.setAttribute('class', 'highlight[%s]' % lang)
            el.removeAttribute('lang')
            
            data = el.firstChild.data
            el.firstChild.data = data.strip()
            
    return doc.toxml()

class ArticleAdmin(admin.ModelAdmin):
    #exclude = ['cached_content', ]
    list_display = ['title', 'published', 'created', 'updated']
    
    def save_model(self, request, obj, form, change):
        obj.cached_content = content_handler(obj.content)
        obj.save()

admin.site.register(Article, ArticleAdmin)