Creating feeds in Django is freaking simple. I’ll start with an example of just updating a feed with the newest objects (for instace, newest blog posts). Similar to the forms.py way of handling our different forms, I’ve created a feeds.py to handle the feeds. from django.contrib.syndication.feeds import Feed from colddirt.dirty.models import Dirt class LatestDirts(Feed): title = "Cold Dirt" link = "/" description = "When you have dirt, you've got dirt. Right..." copyright = 'All Rights Unreserved' def items(self): return Dirt.objects.all()[:50] What this will do is query our Dirt DB and return an obj. The fields here are pretty well documented in the Django docs, …

Since I’ve already covered a really simple syndication example, I’ll move onto something a little more complex. Let’s say you want to offer syndication that is slightly more custom. The Django syndication docs give an example from Adrian’s Chicagocrime.org syndication of beats. I had to ponder a minute to get “custom” syndication to work, so here’s my example from start to finish. First, as usual, feeds.py class PerDirt(Feed): link = "/" copyright = 'Copyright (c) 2007, Blog Mozaic' def get_object(self, bits): from django.shortcuts import get_object_or_404 if len(bits) != 1: raise ObjectDoesNotExist my_dirt = get_object_or_404(Dirt, slug__exact=bits[0]) …

I hear many complaints and questions about newforms, but I’ve personally found it rather easy and logical to use. There are numerous ways for you to use do forms in Django, and most likely the best way to see them all is to read the docs. On the Colddirt demo site, this is how I used newforms. I’ll take the index page as an example. I’ve accessed the newforms module like so:

So, the Django developers, in my opinion, are freaking smart. Instead of bundling Django with a particular library, they have added XML and JSON serialization; us humble users can choose whatever AJAX library we want. Prototype 1.5.1 has been pretty fun to work with, so I’ll kick off this demo with a really simple example. How simple? The intended goal is to have the total number of ‘dirts’ update without user intervention. Laaaammmeee. If you are a visual type of person, take a look on the Colddirt huh page. That number automatically increases without user intervention. And this is how. The process (some pseudocode) will go like this:

Note: Colddirt’s source code is run from Django SVN, check out on May 10th-ish. If you are using a newer branch, some things have changed. i.e. clean_data has been renamed cleaned_data. Remember to check the BackwardsIncompatible page in the wiki. Part 1: Simple AJAX with Django Part 2: Django Newforms Usage Part 3: Search with Django Part 4: Django’s Syndication Framework (simple) Part 5: Django’s Syndication Framework (little more complex) Feel free to see the source code from Github.

Having been in I.T. for quite a few years, upgrading can sometimes be quite a hassle. Having switched to Linux for many years, the crazy upgrade madness of windows is gone. So, how easy is upgrading in Linux? Yea, pretty darn easy, I must admit. And my system certainly isn’t normal! It has been an upgrade from Debian Sarge(ish) -> Ubuntu LTS(ish) -> 6.10 -> 7.04… The only hiccup was at some point when the fonts were reinstalling (I totally ignored the “close all programs” warning:

As you can see by my previous post, my question to squeeze more req/sec from the server, I decided to try out Gentoo (again, last time was four years ago). Now, I like Gentoo, there is no doubt about that. However, I realized things took just too long to get set up. I guess that is the disadvantage of a source based package management tool. Back to Debian I go.

I have a love-hate relationship with Linux. I love it because if there is a problem, I can actually tinker and find the problem and fix it. But I hate it because I like to tinker. Recently I’ve been doing a fair amount of Django programming – enjoying every minute of it. After completing several of my projects I decided to do some benchmarks, and the results are in! Generally I can server cached/semi-cached pages at about 200req/sec. 200req! Considering this is 5,000,000 or so requests a day, and a number I am never going to reach, I still began to wonder: why isn’t it higher? I mean, serving a static html page is at like 1000+ req/sec, so why would a cached page be significantly different? I …

I’m writing this just in case somebody runs into this same issue. I’m about to go live with a website and figured it would be best to have the latest SVN snapshot checked out from Django. I updated, and noticed that my voting module didn’t quite work as expected. I was getting the following error: 'module' object has no attribute 'GenericForeignKey' I jumped into Trac and noticed that just yesterday some things were rearranged. In short, if you are using generic relations, you’ll need to change two parts of your code. First, the generic relations field must be imported out of conttenttype.

I really like using PSAD, both on my server and my laptop. You never know where the mean people are. I also seem to use syslog-ng quite often, meanwhile PSAD seems oriented to syslog. This is fine, and I’m pretty sure the install.pl for the source built will configure syslog-ng.conf automatically. However, I almost always tend to stick with packages if I can – if they are even remotely close to the current version. Anyways, if you need to get syslog-ng.conf configured for PSAD, this is what you need to do: Add this code to the “# pipes” section, maybe stick to keeping it alphabetical.