Django community: RSS
This page, updated regularly, aggregates Community blog posts from the Django community.
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Django Buildbot
Some very cool news – Django now has a public build site up (http://buildbot.djangoproject.com/)and running, matching the trunk and one of the branches against an assortment of versions of python and databases. Matt Croydon and I are going to be … Continue reading → -
Python and Java
I wondering if http://sourceforge.net/projects/pyjdbc/ can be used to let django use http://sequoia.continuent.org/HomePage as a way to scale up postgres Post to Del.icio.us -
Django Sprint
Amanhã, dia 14 de setembro (extendendo para todo ofinal de semana) ocorrerá um Django Sprint[1] pelo mundo todo. Ouseja, será um dia onde os djangers focalizarão sua atenção em melhoraro Django.Um dos objetivos do Sprint é unir as features que estão prontas nobranch do django com o projeto atual, como o newforms-admin,GeoDjango, suporte a multi-databases entre outras features. Outroobjetivo é resolver os tickets em aberto no sistema de tickets doDjango que chegam a mais de 1000 tickets em aberto.Se você quiser participar é só acompanhar e adicionar seu nome napágina do wiki[1]. São mais de 100 pessoas do mundo todo inscritas!Entre elas 9 são brasileiros!Aproveitando o gancho do Sprint Mundial, a comunidade de Django aquino Brasil resolveu fazer um Sprint também, iniciando no mesmo dia (14) e prolongando até o dia 16. Esse Sprint tem como objetivo resolveralgumas coisas relacionadas ao site do djangobrasil, a tradução doDjango, tradução da documentação e alistamento e organização de dois projetos: bingo[2] ( um cms ) e ajaxforms[3] ( newforms + ajax).Se você deseja participar, acesse a página da Sprint do DjangoBrasil[4] para obter maiores informações e assinar a lista depresença.Eu já me inscrevi no Sprint Mundial e marcarei presença no Sprint dodjangobrasil também!!!E … -
The sorry state of database journalism
I’ve been following with interest as Derek Willis explores Caspio, a sort of hosted data-driven web app tool for journalists. The following started out as a comment on his blog, but soon ballooned, so I’m posting it over here where it’ll have more space to breathe. Of course, for this to make any sense, you should read Derek’s articles first: Outsourcing Database Development, or the Caspio Issue (be sure to also read Caspio CEO David Milliron’s comments, too). -
Django Rapidinhas (1)
Ordenar model's randomicamente no DjangoEu resolvi fazer uma série de post's rápidos de dicas sobre Django. As 'Django Rapidinhas'.E o tema de hoje é ordenar model's randomincamente no Django. Para isso precisamos de um model de exemplo. Vamos criar um model que represente um Aluno de uma escola ou faculdade.class Aluno(models.Model): nome = models.CharField(max_lenght=40) idade = models.IntegerField()Para retornarmos em uma lista todos os usuários usando o ORM do Django usamos o método all(): >> Aluno.objects.all()Para ordenarmos essa lista usamos o método order_by, que necessita de um parâmetro informando o nome do campo que será a referência para a ordenação. Para um ordenação descendente adicionamos o '-' ao início do parâmetro e para uma ordenação ascendente não adicionamos nada, só o nome do campo basta. Ordenar por nome, de forma ascendente:>> Aluno.objects.all().order_by('nome') Ordenar por nome de forma descendente: >> Aluno.object.all().order_by('-nome') E para ordenar randomicamente? É difícil?A resposta é não. Pelo contrário. É muito fácil. É só passar uma interrogação (?) como parâmetro. >> Aluno.objects.all().order_by('?') Fácil não? -
More on the two column layout
More tweaks on the two column layout. In addition to using multiple columns to pull the comments up alongside the original posting, I can use the second column for a single prominent ad and a few navigational tools. This gives the ad a persistent spot on the page in a location that doesn't compete with the content, but maintains a certain amount of weight and commands some attention in so far as there is a little animation involved without it actually competing with the content. Part of me wants to put the comment form over there as well. You might also notice that the system is now making recommendations for additional articles based on a combination of the current article and past articles you've read. Ultimately, I'm going to have a mix of strategies that build a single list. Right now, there are content targeted entries and behaviorally targeted ones. I want to add featured articles that I select, articles deemed most popular by page viewing, and articles that match whatever search term last brought you to the site. I'll be presenting them separately until I understand a little better how each performs, but I hope to ultimately have a … -
PyConBrasil
Uma semana após o PyConBrasil resolvi me pronunciar sobre o evento!Para começar, levei aproximadamente 30 horas de viagem para chegar em Joinville! Na viagem estava muito ansioso, por não conhecer ninguém da comunidade pessoalmente e por nunca ter participado de um PyCon e por começar dando um treinamento de um Framework Web que está iniciando em um ambiente onde há muitos desenvolvedores que utilizam Zope/Plone.Meu primeiro contato com o pessoal, na Assembleia tirou todas essas baboseiras da minha cabeça.Aliás a melhor coisa que estou trazendo do evento são as amizades que fiz lá. Realmente estava lá uma comunidade. Muito bate papo entre uma palestra e outra e nas palestras também. Muitas piadas e brincadeiras nos Happy Hour. O humor do pessoal é enorme.No primeiro dia, eu participei dos dois treinamentos: sobre programação com python em celulares nokia e sobre Grok. Os dois treinamentos foram conceitos introdutórios, mas foram muitos importantes para conhecer um pouquinho sobre cada ferramenta. No final do primeiro dia fui avisado que teria uma mesa redonda sobre Python para Web e eu representaria o Django, Dorneles o Plone e Luciano Ramalho o Grok. Nós três tivemos a idéia de falarmos sobre cada ferramenta de forma divertida e … -
Digg-style pagination in Django
Since I’ve finally been picked up by the Django community aggregator (Thanks Jacob!), I figured I’d put out a little snippet for people to use/critique; hopefully more use than critique. I really, really liked the PaginatorTag on the Django Wiki, but I’ve always wanted my sites to have configurable Digg-like behavior; if you wanna know what I’m talking about, just check out how pagination works on Digg. Here’s how the PaginatorTag looks compared to the Digg-style tags. Like the PaginatorTag, this tag is a very basic inclusion tag that builds on the variables already set on the context when paginating with the generic object_list view. There are a few additional context variables created: page_numbers – a list of page numbers to display in_leading_range – boolean if the page is within the leading range in_trailing_range – boolean if the page is within the trailing range pages_outside_leading_range – a list of page numbers outside the leading range pages_outside_trailing_range – a list of page numbers outside the trailing range If you don’t understand what these are, don’t worry – I don’t remember either. I could’ve just appended what needed to be displayed in page_numbers, but instead, I broke it out into what needed … -
Django on Jython
It's on! Leo writes about his experience porting Django to Jython and there's a thread on the django-developers group too. Funny how things seem to click for a bunch of people all at once - the release of Jython 2.2 seemingly the catalyst. For my part I've been working on porting sections of Django to Jython on and off for a couple of weeks. Whilst Java is great for paying the bills, developing web applications with it is pretty slow (by comparison). My stack from bottom up looks something like this MSSQL -> {Spring: [Hibernate , Service tier]} -> Web framework. Yes, it's Enterprisey in the pejorative sense! ;) One of the web frameworks is actually Flex Data Services, which is great for RIAs but terrible where you want to bang together a quick admin app. I figured the architectural gaps between Velocity templates and the enterprise business tier I mentioned above could be filled very nicely with parts of Django, such as New Forms: Where Leo adopts a more holistic approach outside of the container, I've been fiddling around with the appealing concept of Django MVC as Struts 3.0!! Lessons Today, Django in Jython not only involves not only … -
Texas Python Regional Unconference
Just a quick announcement for all the Houston and surrounding area Python lovers out there. There is a Texas Python Regional Unconference being held in a couple weeks (Sept. 15 – 16) at the University of Houston main campus. Registration is free and as simple as adding your name to the registration wiki page. I’ll [...] -
Django vs feedparser on dates
I'm having trouble storing feedparser results in a Django model. It's all about timestamps. Feedparser returns timestamps in a standard time nine-tuple, asserting UTC. Django wants datetime objects. So, I'm trying to translate: django_timestamp = datetime.datetime.fromtimestamp(time.mktime(feedparser_timestamp)) feedparser_timestamp = django_timestamp.utctimetuple() This works fine for the majority of timestamps, but sometimes translating to datetime and back mutates the timestamp. In turn, that makes get-if-modified-since somewhat unreliable. Here are some examples, from my log file: WARNING: (2004, 11, 19, 5, 13, 31, 4, 324, 0) => datetime.datetime(2004, 11, 19, 6, 13, 31) => (2004, 11, 19, 6, 13, 31, 4, 324, 0) WARNING: (2005, 11, 2, 2, 17, 55, 2, 306, 0) => datetime.datetime(2005, 11, 2, 3, 17, 55) => (2005, 11, 2, 3, 17, 55, 2, 306, 0) WARNING: (2006, 12, 13, 0, 21, 25, 2, 347, 0) => datetime.datetime(2006, 12, 13, 1, 21, 25) => (2006, 12, 13, 1, 21, 25, 2, 347, 0) WARNING: (2004, 11, 14, 23, 55, 31, 6, 319, 0) => datetime.datetime(2004, 11, 15, 0, 55, 31) => (2004, 11, 15, 0, 55, 31, 0, 320, 0) I'm off by an hour. I smell a problem with daylight savings. I just wish I knew what to do … -
My "personal security" plan
My personal security plan Prompted by recent reading on cryptography and computer security, I’ve been rethinking my pretty lax personal security plan. Right now I’m doing a number of pretty stupid things, including reusing just a couple passwords (“high” and “low” security), using browser/keychain password remembering too much, and storing important documents (tax returns, etc.) unencrypted. A co-worker just had his laptop stolen, and I’ve realized just how screwed I could be if that happens to me. -
Of Meta Tags and Context Processors
We just launched a site that required heavy utilization of <meta> tags. The most demanding aspect of this process was ... -
Edit inline with ImageField or FileField in Django admin
Django admin lets you edit related model objects “inline”. For example when editing a Recipe you can add/eding a group of Ingredient models. Core fields for edit_inline The related model being edited inline must specify one or more “core” fields using core=True. If the core fields are filled in, the related model is added. If the core fields are empty, the related model is removed. This works great for normal objects with CharFields, etc, but not so well if you want to have images or files uploaded using inline editing. If the only core field is a FileField or ImageField, you’ll get strange behaviour like the file/image being removed when you edit an existing model in the admin. Using inline editing with ImageField or FileField In a recent project I wanted to have an item with title and description and zero or more photos. The Photo model just has an ImageField. To make it easy to edit, I wanted the photos set to edit_inline. Here’s my first attempt: class Item(models.Model): title = models.CharField(max_length=100) description = models.TextField() class Admin: pass class Photo(models.Model): item = models.ForeignKey(Item, related_name='photos', edit_inline=models.STACKED) image = models.ImageField(blank=False, upload_to='items', core=True) Notice that the ImageField in Photo has core=True to … -
iPhone says Welcome to Django
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iPhone says Welcome to Django
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Custom Python installation for Django on Dreamhost
Now that my MBA class is finally done for the summer, I can focus on more important things… like upgrading my Python installation on Dreamhost for my Django application. Seeing as how Dreamhost is still behind the Python times, with Python 2.4 hidden in Dreamhost obscurity, I figured I’d blog about updating your Dreamhost Python installation (and subsequent MySQLdb libraries) to Python 2.5. The very first thing I did was search Google. You know, I really don’t know how people lived pre-Googs. In any case, I found this blog posting describing exactly what I wanted to do. Thanks Ben! Since I’m not a big fan of running one large batch script people create in their blogs, I’ll break it down for the non-*nix fans out there. Before I begin, I’m assuming that you already have Django running on Dreamhost. If you’re having a “wtf” moment, make sure to stop by Jeff’s blog and read “Setting up Django on Dreamhost“. (This is how I set mine up). To follow my short tutorial, you’ll need shell access to your Dreamhost account. After ssh’ing into your Dreamhost account, you should be in your home directory (/home/username). According to the Filesystem Hierarchy Standard, the … -
Permalink decorator pt. 2
Since writing briefly about Django's permalink decorator I've had quite a few emails regarding the use of the permalink decorator and generic views. Here is what works for me... I often have the following urlconf in urls.py: urlpatterns = patterns('django.views.generic.date_based', (r'^(?P<year>d{4})/(?P<month>d{1,2})/(?P<day>w{1,2})/(?P<slug>[-w]+)/$', 'object_detail', dict(info_dict, month_format='%m')), ) And the corresponding get_absolute_url method cut straight from my class looks like this: @permalink def get_absolute_url(self): """ return absolute url of this object """ #pylint: disable-msg=E1101 return ('django.views.generic.date_based.object_detail', None, { 'year': self.create_date.year, 'month': self.create_date.strftime('%m'), 'day': self.create_date.strftime('%d'), 'slug': self.slug}) This is already well documented here and here, but I hope this extra example helps. Note: For completeness, I use Eclipse with Emacs key bindings and the Pydev plug-in with pylint activated - hence the pylint ignore directive. Posted by Cam on Mon, 20 Aug 2007 13:47:02 +1000 -
Mixing OpenID into Django's authentication system
NOTE: This code is now outdated, and it's certainly not the best way to do OpenID in Django. I recommend you take a look at django-authopenid, a fantastic registration system that combines Django's authentication framework with OpenID sign-in. Ross, 17th April 2008 According to the OpenID website, from a consumers point of view OpenID is "the elimination of multiple user names and passwords and a smoother, more secure, online experience. ". What it provides is a single identity for you to use at multiple websites. Instead of having a username and password for each website you peruse, you have an identity (usually a URL to your blog or an OpenID provider) that you use to login. The only password you have to remember is that of your OpenID provider - and you don't have to provide your password to any websites you visit. Simon Willison has been a fantastic campaigner for OpenID, especially for integration with Django. He's written the fantastic django-openidconsumer package which provides the framework for a Django Application to act as an OpenID consumer (that is, people login to your Django app using their OpenID). Simon's package creates a new OpenID object within your application, but is … -
Mixing OpenID into Django's authentication system
NOTE: This code is now outdated, and it's certainly not the best way to do OpenID in Django. I recommend you take a look at django-authopenid, a fantastic registration system that combines Django's authentication framework with OpenID sign-in. Ross, 17th April 2008 According to the OpenID website, from a consumers … -
Validating a Username via jQuery with Ajax
It all starts when John hits your website and clicks the big 'Register' link. John types his name, 'John' into the username box, and hands over his e-mail address and password (unless you're cool and hip, and you let him sign up using his OpenID) and hit 'Submit', just like every other website he's signed up to in the past. Except this time, somebody else called John (what are the chances, eh?) has already signed up using that username, so after waiting a few seconds John sees an error message asking him to select another username. He types a new username and tries 'Submit' again, unsure as to whether his new selection will be suitable. So we fix this problem easily - we tell your users, while they're entering their username, whether their selection is available. To achieve this we're going to use jQuery with it's fantastic Ajax support. To get started, we create a simple view in Django that confirms the presence of a given username. This view will be accessible at /check_username/; and will expect a username via a GET paramater. def checkusername(request): from django.contrib.auth.models import User from django.http import HttpResponse username = request.POST.get('username', False) if username: u … -
Validating a Username via jQuery with Ajax
It all starts when John hits your website and clicks the big 'Register' link. John types his name, 'John' into the username box, and hands over his e-mail address and password (unless you're cool and hip, and you let him sign up using his OpenID) and hit 'Submit', just like … -
Managing local settings in Django
Sometimes it is nice to be able to configure specific Django settings for a single host and not get tons of conflicts the next time you do svn up. I personally solve this by exploiting that the Django settings.py is nothing but Python code. At the last line of the file I do a: from local_settings import * That is, way I do a relative import from local_settings.py and gets every global symbol mixed into the current namespace, allowing me to overwrite every option. An example could be to configure the global settings.py to use sqlite as a database backend for the project, but in the production environment overwrite the DATABASE_* options in the local_settings.py. This goes as well for caching - not many developers run a PostgreSQL and memcached on their laptop. To make sure that local_settings.py never is committed to the repo (and maybe compromising database passwords), it is a good idea to add it to the Subversion property svn:ignore: svn propset svn:ignore local_settings.py /path/to/your/project Furthermore, I usually put up a local_settings.py.dist with a couple of commented out examples for the developers of what could be done here. -
Facebook/Washington Post, Performance Tuning
This final post about my group's work (at Washington Post.Newsweek Interactive) on our Facebook Platform app The Compass is long overdue. But now the time has come! Let's talk Postgresql and Apache performance.In the first two posts on this subject, I wrote about the Facebook Platform itself and the Compass' architecture. In this post, we'll look at some of the challenges we encountered while serving the app and areas we focused on to improve our Postgresql and Apache performance.NOTE: All of this is anecdotal, based on my experience with this app. I'm no performance guru and don't hold myself up as such. I think, too, different applications have different needs, and the requirements of something like Facebook could not be optimal for other situations.Caching LimitationsAs I mentioned last time, all of FBML we load into a profile is cached and served by Facebook, but the hits to our application pages are hits to our servers as well. The first thing that comes to mind with Django is, "well, make sure you have caching enabled." There are a couple reasons why this doesn't work as well as one would like.First, the caching for a Django site is bypassed when the request … -
Django no Ubuntu
Foi criado um package para o Django no Ubuntu [1]. Com isso é possível instalar o Django no Ubuntu com apenas um comando: sudo apt-get install python-djangoSimples, fácil e rápido como tudo na vida deve ser![1] - http://packages.ubuntu.com/feisty-backports/python/python-django
