Empty Thoughts

This Week in Django is a weekly podcast about all things Django.

This week we have discussion about a XSS vulnerability, Some cool projects and blog posts from the community, the Tip of the Week, and a question from the IRC.

Please see the Show Notes below for all the pertinent information and links

Downloads

AAC Enhanced Podcast (24.3 MB, 40:00, AAC)

MP3 Edition (27.5 MB, 40:00, MP3)

OGG Edition (21.7 MB, 40:00, Vorbis)

The Enhanced Podcast version contains screenshots and easy access links to all of the items we discuss throughout the podcast.

Feeds Available

iTunes Feeds are available. By subscribing using the iTunes feeds the podcasts will automatically be downloaded for you when we release them.

iTunes Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

Regular RSS Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

This Week in Django – OGG Edition

Give Us Feedback

Want to give us some feedback on the show? We’re always looking for ideas or suggestions that will help improve each episode. Please contact us at feedback __at__ thisweekindjango.com.

Show Notes

Tracking Trunk (1:26)

• Removed mark_safe from the saved request path on the admin login form (7521) – This prevents a potential XSS attack. Formal announcement will be forthcoming.
  • Django-Users Discussion
  • Django-Developers Discusssion
  • Reporting security issues on Django
  • Use the Security Email Address (security __at__ djangoproject.com) for reporting issues.

Community Catchup (7:56)

• Django Search – great aggregator and Google custom search of community blogs and projects by Alex Aster. Also check out his blog for some interesting posts.
  • Django Blog Search by Kevin Fricovsky
  • Django Search – similar solution by Tim Sloan.

• QuerySet.Update Improvement – Patch to allow updates to do updates back to the same column or even to update with literal values.
  • Ticket 7210

• RailsEnvy Podcast Poll Django Wins 2nd Place – The question, “What other Ruby frameworks are you interested in?”

• Перечисления на службе добра (Enumerations on the service it gathered) – Great post by Alexander Koshelev on different ways to handle choices in your models but also keep things DRY. It’s Russian, but if you do a translation using Google Translate or something similar that should help. The code sample alone are very educational.

• Byteflow Blog Engine – Pretty full featured blogging engine written in Django trunk.

• Changing language on the Admin Marc Garcia presents a nice snippet that makes modifications to the Admin to be able to select the Admin language setting.

• FeedClowd is Open Source – The source code for FeedClowd was released.
  • Nuno Mariz Internet Lifestream with Django

• Research Journal: Django vs Rails Code Size (Original Post Here unless it’s still running Rails) – Interesting post by Eivind Uggedal comparing framework code size. It’s completely unscientific and meaningless, but interesting nonetheless.

Tip of the Week (28:15)

How can I break apart my models.py file into individual files?

• Breaking Apart Models in Django – Nice post by Patrick Altman that sums it up.

IRC Ad Nauseam (32:23)

Django IRC FAQ

Backwards Incompatible Changes Information

My login form Isn’t working the first attempt I login at. The second attempt, it works though. How is this possible?

You probably neglected to send a test cookie on the first view of whatever page your login form is at.

• Django Documentation on Setting Test Cookies

Thank You! (37:34)

More information on Brian Rosner: http://oebfare.com/ and http://twitter.com/brosner/.

This past week I had the pleasure of being interviewed by Shabda Raaj at the 42 Topics Blog. It was a really enjoyable interview and he asked some very good questions (a few that stumped me). It’s not often that I get to be on the “other side of the mic,” so it was kind of a special treat for me. We did the interview through an chat client, so although it worked well at times it made it difficult to get thoughts to flow together very well. I wish Shabda great success with the blog and the 42 Topics website and I’m honored that he took the time for the interview.

This Week in Django is a weekly podcast about all things Django.

This week we have a couple of special guests. First, Eric Florenzano joins us for most of the show, and provides special insight into a few conversation items. Secondly we privileged to have Francis Cleary on the program to discuss a couple Tip of the Week items. We also cover all the regular stuff plus stream the program live on ustream.

Please see the Show Notes below for all the pertinent information and links

Downloads

AAC Enhanced Podcast (33.2 MB, 1:01:14, AAC)

MP3 Edition (42.1 MB, 1:01:14, MP3)

OGG Edition (31.9 MB, 1:01:14, Vorbis)

The Enhanced Podcast version contains screenshots and easy access links to all of the items we discuss throughout the podcast.

Feeds Available

iTunes Feeds are available. By subscribing using the iTunes feeds the podcasts will automatically be downloaded for you when we release them.

iTunes Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

Regular RSS Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

This Week in Django – OGG Edition

Give Us Feedback

Want to give us some feedback on the show? We’re always looking for ideas or suggestions that will help improve each episode. Please contact us at feedback __at__ thisweekindjango.com.

Show Notes

• Streaming the Show Live on UStream If you want to watch us do the show including show prep stuff follow Brian Rosner on Twitter for notifications.

Tracking Trunk (2:50)

• Allow Query objects to be values in filters (7494) – This has use with update statements. Problem remained in MySQL with a test in 7495 and a fix for nested updates in 7496.

• Allow QuerySets and Query objects to be pickled and unpickled (7499) – Pickle Query when you only want to recreate the necessary information to recreate the QuerySet, otherwise pickle the QuerySet.

• Fixed problem with double-negation queries on Oracle (7509)

Branching & Merging (8:53)

• Allow a formset to be passed through _inlineformset_factory. (7508)

• Implemented change history for the admin (7507) – This includes the ability to track changes on a newform. Model formsets now only return the changed/new objects saved. A big thanks to Karen Tracey and Alex Gaynor.

Community Catchup (19:38)

• Django l10n – Marc Garcia, who was on last week’s show provides a followup post that does a great job of pulling together the information we discussed as well as stuff we did not get time to cover.

• jQuery style chaining with the Django ORM – Informative post by Simon Willison that discusses the chaining capabilities of the ORM as well as an interesting approach to expanding the QuerySet methods.
  • Snippet 734 on QuerySetManager

• Inheritance vs. Composition – Excellent post by Eric Florenzano on the differences between inheritance and composition approaches to structuring your models in Django.

• An interview with Russell Keith-Magee – Django core contributor – Another great interview by Shabda Raaj at the 42 Topics Blog.

Tip of the Week (36:16)

Francis Cleary is on the show with us this week to present his tip that he entered in the Win Cool Stuff Contest and was our grand prize winner.

Multiple view prefixes

Rather then have complex and long urls like so

urlpatterns += patterns('',
   (r'^$', 'mySite.Project.views.mainpage' ),
   (r'^custom/view/$', 'mySite.Project.views.'view_function'),
   (r'^lookup/tag/(?P<tag>\w+)/$', 'mySite.Project.views.tag_list'),
   (r'^users/$' , 'django.views.generic.list_detail.object_list', user_dict),
   (r'^recent/$','django.views.generic.list_detail.object_list', all_dict),
   (r^text/$', 'django.views.generic.date_based.object_detail', object_dict),
)

Take advantage of the first argument to the patterns() function to specify a prefix to apply to each view function. just make sure you have the += not just =.

urlpatterns += patterns('mySite.Project.views',
   (r'^$', 'mainpage'),
   (r'^custom/view/$', 'view_function'),
   (r'^lookup/tag/(?P<tag>\w+)/$', 'tag_list'),
)

urlpatterns += patterns('django.views.generic',
   (r'^users/$' , 'list_detail.object_list', user_dict),
   (r'^recent/$', 'list_detail.object_list', all_dict),
   (r'^(?P<year>\d{4})/$', 'date_based.archive_year', object_dict),
)

• Django Documentation on Multiple View Prefixes

Advanced Generic Views

If you don’t want your urls.py filling up with dictionary or would like to do more complicated filtering or extra work to a list. Define view functions that return your generic view and dictionary.

In this example from the Django Book. We will use a generic view to display an author but we want to update the last_accessed data.

urls.py

from mysite.books.views import author_detail

urlpatterns = patterns('',
   #...
   (r'^authors/(?P<author_id>d+)/$', author_detail),
)

views.py

import datetime
from mysite.books.models import Author
from django.views.generic import list_detail
from django.shortcuts import get_object_or_404

def author_detail(request, author_id):
   # Look up the Author (and raise a 404 if she's not found)
   author = get_object_or_404(Author, pk=author_id)

   # Record the last accessed date
   author.last_accessed = datetime.datetime.now()
   author.save()

   # Show the detail page
   return list_detail.object_detail(
       request,
       queryset = Author.objects.all(),
       object_id = author_id,
   )

Rather then calling the generic view from the urls.py you can once again see how uncoupled things are in django and just return the generic view from your own wrapped view.

• Django tips: get the most out of generic views – Great post on wrapping generic views by James Bennett.

• Are you generic? – Great earlier post by Wilson Miner on using Generic Views for non-programmers.

IRC Ad Nauseam (45:33)

Django IRC FAQ

Backwards Incompatible Changes Information

• We have discussed the changes to the Paginator that occured during the PyCon 2008 sprints, but we are still seeing people tripping up over it. Paginator originally worked only on QuerySets, but has now been abstracted out. Paginiator is now generalized enough to work on lists. This is the reason for QuerySetPaginator. It special cases certain things to prevent performing the wrong operation on the QuerySet.

>>> from cameras.models import CameraImage
>>> CameraImage.objects.all().count()
248788L
>>> from django.core.paginator import Paginator 
>>> paginator = Paginator( CameraImage.objects.all(), 48, True)
>>> import time;start=time.time(); page = paginator.page(50); print time.time()-start
17.4773068428

Some questions about general IRC

We get lots of questions about IRC in general, so maybe a few little tidbits here and there:

Why don’t you use manners? When I say Thank You, you don’t respond.

Okay here’s the deal, there’s no reason to increase the noise level on IRC. That means although we appreciate the thanks, often we will not acknowledge it. So don’t take it personally.

I asked a question and no one responded. Why is that?

People will answer if they know. You can re-ask but please wait a bit. Don’t use the #django-dev channel, that’s the wrong thing to do.

It might be good to think about how you can rephrase the question.

Use the Django-Users Mailing list. It’s another avenue available.

Can anyone help with a NewForms-Admin Question?

Don’t ask to ask. Just ask straight away. It depends often on the area of the question. So it’s best to just ask your question.

Will “blank” work?

Try it. Often the best thing to do is try it. That’s what anyone will end up doing.

Couple other tips, read the FAQ, Backwards Incompatible Changes, and the Freenode FAQ.

Thank You! (58:20)

This Week in Django is a weekly podcast about all things Django. This week’s show is a huge show with lots of great features.

This is the second part of a two part series on Internationalisation. This week we are privileged to talk to Marc Garcia, Django’s Catalan translator, among many other things. Marc discusses the localisation side of things, helping us understand what’s required to get your web site localised.

Additionally, we also talk about QuerySet Refactor branch having been merged to trunk.

Finally, we have a special full length song by Django’s own Adrian Holovaty. It’s amazingly beautiful, so I encourage you to stay tuned for it.

Note: We apologize for the occasional audio drops during the interview with Marc Garcia. That’s just how these things go when calling across the globe.

Also, We’ve modified the compression scheme a bit, so let us know if the sound is better or worse.

Please see the Show Notes below for all the pertinent information and links

Downloads

AAC Enhanced Podcast (57.5 MB, 1:12:02, AAC)

MP3 Edition (49.5 MB, 1:12:02, MP3)

OGG Edition (38.5 MB, 1:12:02, Vorbis)

The Enhanced Podcast version contains screenshots and easy access links to all of the items we discuss throughout the podcast.

Feeds Available

iTunes Feeds are available. By subscribing using the iTunes feeds the podcasts will automatically be downloaded for you when we release them.

iTunes Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

Regular RSS Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

This Week in Django – OGG Edition

Give Us Feedback

Want to give us some feedback on the show? We’re always looking for ideas or suggestions that will help improve each episode. Please contact us at feedback __at__ thisweekindjango.com.

Show Notes

Big News (0:55)

QuerySet-Refactor Branch Merged!

As Malcolm Tredinnick mentioned on last week’s show, the Queryset-Refactor branch has been merged into trunk. Changeset 7477 makes that happen.

• Google Groups Announcement on QuerySet Refactor Merge

Over the past several months we have giving you a lot of information on the changes that contained in the Queryset Refactor modifications. We plan to get into those things more in next weeks show.

Adrian Holovaty Special Song

At the end of the program we will be presenting a special song by Adrian Holovaty. So stay tuned for that.

Special Feature – Localisation (5:21)

This week we are honored to be able to speak with Marc Garcia. Marc is the founder and CTO of Accopensys, a software development solutions company. Marc also maintains a blog called the The Best of Marc Garcia.

Marc has also been heavily involved in doing:

• many translations on Catalan and Spanish languages,
• main development of Spanish localflavor,
• development of Transdb (http://code.google.com/p/transdb/) that allows Django field translations on database, and
• development of some small multilanguage web sites using Django

On last week’s program Malcolm Tredinnick gave us some great information on internationalisation. This week we are going to get into localisation, which as I understand it is the process of translating a product into different languages or adapting a language for a specific country or region.

Translating Django

• Let us start off with looking at translating Django itself. What is the process involved for localising Django internals?

• What specific language elements cause you problems? Malcolm had touched on difficulty with pluralisation. Would you comment on that and possibly other areas that present special challenges?
  • Billions in America vs Europe

• What sort of resources are available to translators?

• In the area of translating Django, are there specific changes that you feel should be made in order to make the whole process better and easier for translators?
  • Django LocalFlavor

• Last week we discussed some problems with Django documentation and slang that is used, etc… causing problems for getting things translated. What perspective do you have about this?

Translating Websites

• Okay, getting in to translating websites. This is where most of our listeners would be most impacted. What are the steps for localising my application?
  • Django Internationalization Documentation
  • Django verbose_name Documentation

• There’s two template tags, trans and blocktrans for translating strings in the template. What is the difference between the two and how would you decide to use one or the other?

• What about translating database content? How is that achieved?

• I know that you are the developer of transdb. There’s also a project called django-multilingual. Would you discuss these?

• I recently ran across the django-rosetta project on google code. It is a very impressive admin screen for doing translation. Have you used this project? Are there any similar types of tools to assist translators?
  • Poedit – a cross-platform gettext catalogs (.po files) editor.
  • Msgfmt – a Unix utility that creates message object files from portable object files.

Miscellaneous

• Anything else that we didn’t cover that you would like to mention?

Community Catchup (48:49)

• Google Summer of Code 2008 for Django – we want to congratulate the individuals that have been accepted and wish you all the best with your projects:
  • Add Aggregate support by Nicolas Lara, mentored by Russell Keith-Magee
  • Implementation of more backends for the djangosearch API by Ben Firshman, mentored by Joseph Merrell Kocherhans
  • Automatic Generation of Models from File Data by Collin Anderson, mentored by Mark Choate
  • Rewrite the Django Comments Framework : Django-Newcomments by Thejaswi Puthraya, mentored by Jannis Leidel

• Related to the above there have been some interesting design discussions on the Django-Developers mailing list. If you want to provide your own input please check them out.
  • Aggregate Support to the ORM
  • Rewrite the Django Comments framework

• Django Search Projects
  • GSOC DjangoSearch Project
  • Brian Rosner’s Django-Search Project

• An Interview with Malcolm Tredinnick and An Interview with James Bennett – Two great interviews by the Shabda Raaj at the 42 Topics Blog.

• Software Internationalisation – Great followup by Malcolm Tredinnick sort of filling in the holes from last week’s show.

• New django-nyc Meetup Group – Kevin Fricovsky and Loren Davie announced that they are forming a meetup group for New Yorkers. If you’re in the New York City area, I encourage you to get involved.
  • django-users Posting
  • Google Group

Thank You! (1:05:50)

Special Song by Adrian Holovaty

Radiohead is holding a “contest” called Radiohead Remix, in which they’re inviting fans to remix the song called “Nude” from their latest album. They’ve released the raw tracks and are encouraging people to remix the tracks to create something different.

So Adrian sat down and did his own jazzy acoustic mix, and we asked him if we could play it for the show. His remix is called “Nude (jazzy acoustic),” and if you like it, please vote for it.

• Nude (jazzy acoustic) Song and Voting
• Check out my Radiohead remix – post by Adrian Holovaty giving more information on the song.

More Information

Keep track of Brian Rosner at his website

This Week in Django is a weekly podcast about all things Django.

SPECIAL FEATURE – Internationalisation

This is the first part of a two part series on Internationalisation. This week we are privileged to talk to Malcolm Tredinnick, Django core developer. Malcolm educates us on what internationalisation is all about, how it is implemented in Django, and some of the areas that can be improved in the future.

Additionally, we also discuss a lot of changesets in the Queryset Refactor Branch, and a couple of blog posts from the Django community.

It is our longest show yet, but definitely worth your attention. This is a must listen podcast.

Please see the Show Notes below for all the pertinent information and links

Downloads

AAC Enhanced Podcast (79.3 MB, 1:41:32, AAC)

MP3 Edition (69.8 MB, 1:41:32, MP3)

OGG Edition (56.8 MB, 1:41:32, Vorbis)

The Enhanced Podcast version contains screenshots and easy access links to all of the items we discuss throughout the podcast.

Feeds Available

iTunes Feeds are available. By subscribing using the iTunes feeds the podcasts will automatically be downloaded for you when we release them.

iTunes Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

Regular RSS Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

This Week in Django – OGG Edition

Give Us Feedback

Want to give us some feedback on the show? We’re always looking for ideas or suggestions that will help improve each episode. Please contact us at feedback __at__ thisweekindjango.com.

Show Notes

Special Feature – Internationalization (1:39)

Malcolm Tredinnick, Django core developer, joins us to discuss internationalisation. Malcolm has often played the role of expert on internationalization / localization issues, speaks several languages, and works closely with the Django translators.

To learn more about Malcolm Tredinnick, be sure to add his blog, Defying Classification, to your RSS feeds and listen to our interview with Malcolm on This Week in Django 13

• Django Documentation on Internationalisation

• What is the difference between internationalisation and localisation?
  • Plural Forms

• Python 3.0 will feature full unicode support. What does that mean for Django? Will there be any benefits?

• I attended a discussion by Tim Bray, who I suppose is a recognized internationalisation expert, and by the end of the discussion I felt like the idea of creating truly internationlised applications is somewhat hopeless. What are your thoughts about this?

• How does translation support appear to the end-user in something like Django? (how they set which language to use, what Django does, etc).

• Justin Lilly, a Django user and rabid fan of the show, wanted to ask, “I’m curious how many different ways there are to declare gettext-like things.. ugettext, gettext, (as a commonly used alias).. any more I don’t know?” So what about it? What’s the differences?

• What is the difference between unicode and utf-8? Is there a difference?

• What sort of things do developers need to watch out for when writing code for an international audience?

• What are some areas where Django’s support is a little weak and can be improved?
  • The Babel Project
  • Django {% blocktrans %} Template Tag
  • There’s an internationalization component in Trac

• What can we do to improve the support in third-party applications for Internationalisation?
  • People learn differently so maybe we need to explore as many ways as possible to educate people. We can use things like tutorials or screencasts.
  • James Bennett’s apps are internationalised.

• Goal is to get Django to pass the Turkey test yet, but it’s a goal.

• How do you handle sorting in Django?

Tracking Trunk (59:37)

• Updated Markdown Filter to Support v1.7 (7423) – From the mailing list, “Additionally, the encoding argument has been removed from both markdown and Markdown. Markdown expects unicode (or ascii) input and it is the users responsibility to ensure that’s what is provided. Therefore, all output is in unicode. Only markdownFromFile accepts an encoding.”

Branching & Merging (1:01:57)

• QuerySet is no longer customizable (7426) – The backends need to override the Query class instead.

• Detect infinite loop in ordering self (7429)

• Added way to specify related names when using Abstract Base Classes (7432) – From the docs, “To work around this problem, when you are using related_name in an abstract base class (only), part of the name should be the string '%(class)s'. This is replaced by the lower-cased name of the child class that the field is used in.”

• Internal optimizations in the Insert and Update methods (7437) – used for internal methods within Django.

Community Catchup (1:24:12)

• Django question of the day: two apps, relating them – Great post by Clint Ecker asking how people handle two apps that need to have dependencies on them.

• The limits of Django – Interesting post by Alberto García Hierro where he discusses the process he used to optimize queries. His final solution ended up being a C library. The post received tons of interest and he provided a followup, The limits of Django: the answers, where he addresses some of the questions he received.

• DjangoSites.org gets OpenID support.

Thank You! (1:38:43)

This Week in Django is a weekly podcast about all things Django.

This week we talk about Google App Engine, some changes to the QuerySet Refactor branch, the documentation refactor sprint, some cool projects from the community, the Tip of the Week, and a question from the IRC.

Please see the Show Notes below for all the pertinent information and links

Downloads

AAC Enhanced Podcast (31.0 MB, 52:51, AAC)

MP3 Edition (36.3 MB, 52:51, MP3)

OGG Edition (29.0 MB, 52:51, Vorbis)

The Enhanced Podcast version contains screenshots and easy access links to all of the items we discuss throughout the podcast.

Feeds Available

iTunes Feeds are available. By subscribing using the iTunes feeds the podcasts will automatically be downloaded for you when we release them.

iTunes Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

Regular RSS Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

This Week in Django – OGG Edition

Give Us Feedback

Want to give us some feedback on the show? We’re always looking for ideas or suggestions that will help improve each episode. Please contact us at feedback __at__ thisweekindjango.com.

Show Notes

Big News (1:23)

• Google releases App Engine. It’s all Python, and “build on Django”, but is it the killer platform?
  • Google App Engine Django – Google code project by Google employees to do some mapping of the backend to App Engine.
  • Google App Engine: The good, the bad, and the ugly? – excellent write up by Doug Napoleone.
  • Batteries sold separately
  • Google App Engine for developers – in depth discussion by Niall Kennedy.
  • Technorati Search on Google App Engine

Tracking Trunk (14:55)

• ORACLE backend LIKE switched to LIKEC (7412) – LIKEC is used when characters are represented in Unicode complete character semantics. A composed character is treated as one character.

Branching & Merging (16:40)

• Documentation Refactor Sprint

• Boolean Evaluation of cached Empty QuerySets was returning True (7417) – _QuerySet.__nonzero__ unconditionally was returning True when the result cache is populated, even if nothing is in the cache.
  • Cleaned up changes from 7417 (7419) – Less indentation for the win.

• When using select_related with a nullable FK an inner join was being used (7418) – Now it uses a LEFT OUTER join if the foreign key is nullable.

• Queryset Refactor Branch Getting Close – Malcolm Tredinnick posted on the Django User’s list that he is pretty close to merging queryset-refactor into trunk.

Community Catchup (24:14)

• Minor Correction – The Django book, Python Web Development with Django, has two other contributing authors, Jeffrey Forcier and Wesley J. Chun. Wesley Chun is also the author of Core Python Programming, another great book.
  • Learning Python – by Mark Lutz and David Ascher.

• Lots of Confusion about Purpose of Django-Developers List – Django-Developers mailing list is for people developing the internals of Django, not general developers using the Django web framework. This is just part of the growing pains.

• Django Plugables – Django site to be a centralized repository for django projects.
  • Lessons Learned – Eric Florenzano posted an excellent post in relation to the Django Plugables release and his own community project, Django Apps. He prefaces the post with an great quote by George S. Patton, “A good plan, violently executed now, is better than a perfect plan next week.”

• Django Dash – contest for django site writing.

• DjangoBot / DjangoPeople Integration – Simon Willison and Brian Rosner teamed up to provide a two way integration with the two services. DjangoBot now will report back to DjangoPeople.net when you are active in any of the Django related channels it lives in. This all goes without saying that it can be turned off in your privacy settings on DjangoPeople.net. This will only occur if you have a DjangoPeople.net account AND have given your IRC handle. You will be notified the first time the bot sees you and begins tracking you with a Private Message.
  • Active on IRC in the past hour

• Multiple Inheritance of ModelForms and NewForms – Simon Willison presents a solution to this problem in a Django Snippet. It’s a bit hairy but if you have this requirement then this seems like a great way to solve the issue.

Tip of the Week (44:41)

Calling the delete method on a related object deletes the many side objects too, but does not call the delete method on the many side. There is an easy way to accomplish the same thing using signals.

• Ticket 6565 – discusses this issue and the solution.

• Django Signals Documentation

class B(models.Model):
    a = models.ForeignKey(A)

    def pre_delete(self):
        print 'deleting b'

def delete_b(sender, instance, signal, *args, **kwargs):
    instance.pre_delete()

dispatcher.connect(delete_b, signal=signals.pre_delete, sender=B)

IRC Ad Nauseam (48:38)

Django IRC FAQ

Backwards Incompatible Changes Information

“I setup my static media according the documentation. The admin is showing up properly but none of my own stylesheets or images are being served.”

You likely have the ADMIN_MEDIA_PREFIX set to the same thing as your MEDIA_URL setting.

• ADMIN_MEDIA_PREFIX set to /admin_media/ in settings template (#2891) – Ticket that proposed the change to remove the confusion, but closed as wontfix.

Thank You! (51:15)

• For more brosner goodness, check out http://oebfare.com/.

This Week in Django is a weekly podcast about all things Django.

This week we talk about EuroPython 2008, some cool posts and projects from the community, the Tip of the Week, and a question from the IRC.

Plus, we are fortunate to have a special appearance by Mike Axiak to discuss streaming uploads and ticket 2070.

Please see the Show Notes below for all the pertinent information and links

Downloads

AAC Enhanced Podcast (45.3 MB, 55:54, AAC)

MP3 Edition (38.4 MB, 55:54, MP3)

OGG Edition (30.5 MB, 55:54, Vorbis)

The Enhanced Podcast version contains screenshots and easy access links to all of the items we discuss throughout the podcast.

Feeds Available

iTunes Feeds are available. By subscribing using the iTunes feeds the podcasts will automatically be downloaded for you when we release them.

iTunes Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

Regular RSS Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

This Week in Django – OGG Edition

Give Us Feedback

Want to give us some feedback on the show? We’re always looking for ideas or suggestions that will help improve each episode. Please contact us at feedback __at__ thisweekindjango.com.

Show Notes

Big News (1:01)

• EuroPython 2008 – To be held in Vilnius, Lithuania from Monday July 7th – Saturday July 12th. No Django sprint officially announced as of yet.

Tracking Trunk (3:55)

• Quite a few interesting changes in the GIS branch.
• Thank you to all the translators
• We’re working on an i18N show
  • A picture is worth a thousand words – Language distribution of Django web site visitors.

Community Catchup (7:37)

• SQLite Adding index changes LEFT OUTER JOIN to act as INNER JOIN – Malcolm Tredinnick pointed us to a problem in SQLite that was posted on the mailing list by someone called Dinobot. This isn’t a bug that’s Django’s fault and there’s not a lot that Django can do about it. So if you use SQLite and add your own indexes then you might want to rebuild SQLite from source code.

• Refactoring the Documentation – Jacob Kaplan-Moss posted to the Django-Developers discussion list that he is doing a ton of work to refactor the Django documentation structure, breaking it up based on stakeholders.
  • Sphinx – excellent Python documentation generator

• Streaming Uploads Discussion – Mike Axiak started a great discussion on some work he’s doing to handle streaming uploads. It’s been a very active discussion thread. I know that Mike is spending a ton of time working on this along with Ticket 2070 as he’s hanging out in IRC all hours of the day and night.
  • python-rfc2388 – Google Code project that provides a lazy RFC2388 HTTP multipart parser.
  • django-uploadutils – Will repackage up a bunch of useful upload utilities.
  • Ticket 5361 – FileField refactor being worked on by Marty Alchin

• json_encode – a great JSON encoding module by Wolfram Kriesing which he states is improved and simplified. If you are doing AJAX work you should really check this out.

• Internet lifestream with Django – For a second week in a row we feature another project by Nuno Mariz. Lifestream is developed using the Python FriendFeed API and some regular Django goodness. Check out Nuno’s Lifestream for an example.
  • jellyroll – Similar project by Jacob Kaplan-Moss that does not require a FriendFeed account.
  • Jeff Croft’s Blog – Excellent blog with great information on web design.

• Python Web Development with Django – Paul Bissex book on Rough Cuts. Estimated completion July 18.
  • This Week in Django 6 – Interview with Paul Bissex
  • Pre-order the Book on Amazon Today

• DjangoFriendly – is a community resource for finding the friendliest Django hosting environments. Designed and developed by Ryan Berg.

• Django Djblets – The Review Board team abstracted a set of useful helpers. Included are Authentication improvements, Flexible datagrids, Decorators, Caching functions, and Unit testing utility classes.
  • Clarification, in the show I said decorators for doing tagging, what I meant was decorator for doing a template tag. See the docs.

Tip of the Week (42:21)

• Last week’s Tip came from Alex Gaynor. Apologies for not mentioning it.

This week’s tip is for users of the newforms-admin branch. Even if you are not using newforms-admin, this might be something to make you look at newforms-admin or just keep in the back of your mind once it is merged into trunk.

It is very possible to define your own form for both the main form and any inlines. A FormSet class is used to make inlines work which is simply some abstraction to using more than one form around some data.

# your ModelForm (probably in forms.py)
class AdminPostForm(forms.ModelForm):

    class Meta:
        model = Post

    def clean_title(self):
        value = self.cleaned_data.get("title")
        # custom validation with value here
        return value

# your ModelAdmin (probably in admin.py)
class PostAdmin(admin.ModelAdmin):
    form = AdminPostForm
admin.site.register(Post, PostAdmin)

# your model
class Post(models.Model):
    title = models.CharField(max_length=100)
    body = models.TextField()

IRC Ad Nauseam (46:41)

Django IRC FAQ

Backwards Incompatible Changes Information

• DjangoBot Updates
  • Fixed the Time Zone bug caused by configuring settings manually because it doesn’t set the environment correctly.
  • Corrected caching problems by using file-based caching.
  • Urlize filter is very slow as detected by hotshot
  • Eric Florenzano is working on an optimized version. For more information on Eric listen to our interview with him on This Week in Django 11.

I just created a post for my new blog but the post is not showing up for about an hour. I’m using a date-based generic view. Is there some kind of caching going on?

It is possible that you have not set your time zone information appropriately in your settings file.

• Django Documentation on TIME_ZONE

• Available Time Zone Choices

Thank You! (54:30)

• Visit Brian Rosner’s website for the latest hotness!

This Week in Django is a weekly podcast about all things Django.

This week we talk about a few source commits, NewForms-Admin branch updates, a whole bunch of excellent blog posts from the community, the Tip of the Week, and a couple of questions from the IRC.

Please see the Show Notes below for all the pertinent information and links

Downloads

AAC Enhanced Podcast (38.6 MB, 47:34, AAC)

MP3 Edition (32.7 MB, 47:34, MP3)

OGG Edition (26.2 MB, 47:34, Vorbis)

The Enhanced Podcast version contains screenshots and easy access links to all of the items we discuss throughout the podcast.

Feeds Available

iTunes Feeds are available. By subscribing using the iTunes feeds the podcasts will automatically be downloaded for you when we release them.

iTunes Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

Regular RSS Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

This Week in Django – OGG Edition

Give Us Feedback

Want to give us some feedback on the show? We’re always looking for ideas or suggestions that will help improve each episode. Please contact us at feedback __at__ thisweekindjango.com.

Show Notes

Intro

We discuss the new intro music, the fake Brian Rosner, and all the great supporters of the show that we met at PyCon.

Tracking Trunk (4:48)

• Converted the Admin to use the new paginator (7363) – follows on last week’s Changeset 7306 which implemented the new paginator syntax.

• Removed the ado_mssql Backend (7364) – Yeah, out with the cruft.
  • django-mssql
  • django-pyodbc

• Added Basics to build Docs with Sphinx (7370) – Sphinx is a really nice Python documentation generator.

Branching & Merging (11:13)

• NewForms-Admin: Form classes can now be swapped out very easily (7360)

• NewForms-Admin: ModelForm now supports media defined in the form (7365)

• NewForms-Admin: Removed the delete checkbox from extra items in inlines (7367)

Community Catchup (16:23)

• Django Error Notification with Jabber – Awesome post by Nuno Mariz where he describes how to setup Django to send website errors to your IM client. The implementation is elegant and simple.
  • Nuno Mariz on Pownce
  • Programming Collective Intelligence

• Using Jinja With Django – a bit controversial, but a good read. David Cramer has been posting regularly with some thought provoking posts.

• A Faster Django Test Suite – Brian Rosner tests out an implementation of Django’s test suites that take advantage of multiple cores.

• More Django Queryset Notes and Queryset Implementation – Excellent posts by Malcolm Tredinnick on the internals of some of the Queryset Refactor stuff and sets the record straight on a couple of items that we incorrectly commented on last week.

• Django Snippets: Control FCGI processes through management – Snippet that adds fcgi to settings.INSTALLED_APPS, which allows you to start and stop FCGI processes through manage.py
  • Eric Florenzano’s Blog and his Django People profile

• FormWizard: multiple-step forms in Django – Great post by Jared Kuolt (aka SuperJared) that quickly follows on the heals of the last week’s Changeset 7236 which added a new django.contrib.formtools.wizard app.

Tip of the Week (32:27)

get_object_or_404 can take a QuerySet.

get_object_or_404(Portfolio.objects.all().select_related(), slug=slug)

• Django Documentation on Shortcuts

IRC Ad Nauseam (36:36)

Django IRC FAQ

Backwards Incompatible Changes Information

How do you copy a model instance object?

The easiest way is to set the primary key for the model to None. Then save the instance. This will create a new record in the database.

post = Post.objects.get(pk=1)
post.pk = None
post.save()

I’m trying to run tests on my application that is just template tags. It’s not working. What’s the problem?

The testing framework requires there to be a models.py in the application. Create this file and everything should work fine.

Thank You! (43:00)

This Week in Django is a weekly podcast about all things Django.

This week we talk our experience of PyCon 2008, the Django Sprint, a whole host of changesets, and updates on the Queryset Refactor and NewForms-Admin branches.

Plus, new music from Django’s own Adrian Holovaty.

Please see the Show Notes below for all the pertinent information and links

Downloads

AAC Enhanced Podcast (40.9 MB, 50:11, AAC)

MP3 Edition (34.5 MB, 50:11, MP3)

OGG Edition (28.0 MB, 50:11, Vorbis)

The Enhanced Podcast version contains screenshots and easy access links to all of the items we discuss throughout the podcast.

Feeds Available

iTunes Feeds are available. By subscribing using the iTunes feeds the podcasts will automatically be downloaded for you when we release them.

iTunes Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

Regular RSS Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

This Week in Django – OGG Edition

Give Us Feedback

Want to give us some feedback on the show? We’re always looking for ideas or suggestions that will help improve each episode. Please contact us at feedback __at__ thisweekindjango.com.

Show Notes

New intro/outro music graciously performed by Adrian Holovaty. Check out Adrian’s performance pieces on YouTube.

PyCon Thoughts (1:37)

We discuss our PyCon 2008 experience and the Django Sprint.

• Sebastian Hillig’s Flickr Feed

Tracking Trunk (6:37)

• Corrected the handing of traceback on loaddata (7199)

• Beefed up caching of ContentType lookups by adding ContentType.objects.get_for_id() (7216) – This shares the same cache as get_for_model(), and thus things that do lots of content type lookups by ID will benefit. Also allowed for a performance improvement to generic foreign keys and multiple lookups on the content type in Changeset 7228.

• Implemented django.contrib.formtools.wizard (7236) – implements a multi-page form, validating between each step and storing the form’s state as HTML hidden fields so that no state is stored on the server side. See Form Wizard Document for more information.

• Fixes the assignment of IDs to SelectDateWidget (7291) – Also see Changeset 7337 which makes adds error robustness and stores the original date entered even if it is bogus.

• Fixes the serialization of the FileField (7293) – Serialize a FileField using its filename from the database, not external URL.

• Better error handling around syndication feeds when all the extra URL bits are missing (7295) – This will properly render a 404 instead of a AttributeError. Docs and tests merged in Changeset 7328

• Added outlog/errorlog options to runfcgi (7297)

• Added a new and improved Paginator class (7306) – allows you to pass a Page object to the template instead of 5 or 6 separate variables. ObjectPaginator still exists for backwards compatibility but issues a DeprecationWarning. Affects list_detail.object_list in Changeset 7307. See Pagination Documentation for more information.

• Added better checking of project names when using startproject (7320) – Now it attempts to import the name. If the import is successful, then the name can not be used.

• Added FilePathField to NewForms (7323) – This field allows choosing from files inside a certain directory. See FilePathField Documentation for more information.

• Switch Syndication Feeds to use RequestContext (7324) – Allows access to things like MEDIA_URL.

• Easy to add custom labels to ModelChoiceField (7326) – This is possible through subclassing. See ModelChoiceField Documentation for more information. See Overriding ModelChoiceField labels for why you are glad this change was made.

• More portable way to get the tmpdir location on Windows (7328) – This fixes Windows so that you can use the new file-based session backend.

• Allow model instances to be used as a default for ForeignKeys via a callable (7331) – See the regression tests on the changeset for an example of usage.

• Adds local server time to the debug output page (7333)

• Added an is_ajax() method to HttpRequest (7334) This uses the de facto standard header for detecting an XmlHttpRequest call, and is therefore supported by all the big Javascript libraries. There’s a proposal to switch to a simple Ajax debug page while debugging based on a Django Snippet 650.

• Removed bcc recipients from e-mail headers (7347)

Branching and Merging (33:20)

• Update on the status of NewForms-Admin Branch
  • ManyToManyRawIdWidget no longer allows wrong data being sent to the database. Admin widgets tests are now in regressiontests. (7262)
  • Cleaned up the implementation and APIs of all the formset classes. Backwards-incompatible. (7270)
  • Collapsed some of the add/change hooks into a single get method that takes an optional obj argument. Backwards incompatible. (7275)

• Django-Developers Discussion on Form Filters

• Update on the status of Queryset Refactor Branch
  • added none on the QuerySet (7232) – I have my own QuerySet now.
  • improved values to be able to pull across relationships (except Many to Many) (7230) and also Changeset 7343
  • lots of speed optimizations in the iterator code and get lookups (7246) and also Changeset 7248
  • lots of fixes to properly support situations where you’re using abstract base classes or multi-model inheritance
  • fixes to get Oracle backend working properly (7321)

Thank You! (47:07)

• Brian Rosner’s Blog

Although we were planning to record an episode of This Week in Django on Sunday night while we were at PyCon 2008, we were so busy coding on projects, interacting with other developers, and focussing on BDD that we decided that it was just too much to take on. We apologize and are planning to record a post-PyCon show this weekend.

This Week in Django is a weekly podcast about all things Django.

This week we talk to Doug Napoleone on of the many volunteers working hard to bring us PyCon 2008 in Chicago. Doug is Software Coordinator and Webmaster for PyCon 2008 and lead developer and maintainer for PyCon-Tech. Doug gives you all the information you need to be well prepared for PyCon this week. We also announce the winners of the Win Cool Stuff Contest and some information on This Week at Pycon.

Please see the Show Notes below for all the pertinent information and links

Downloads

AAC Enhanced Podcast (46.4 MB, 59:37, AAC)

MP3 Edition (41.0 MB, 59:37, MP3)

OGG Edition (32.2 MB, 59:37, Vorbis)

The Enhanced Podcast version contains screenshots and easy access links to all of the items we discuss throughout the podcast.

Feeds Available

iTunes Feeds are available. By subscribing using the iTunes feeds the podcasts will automatically be downloaded for you when we release them.

iTunes Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

Regular RSS Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

This Week in Django – OGG Edition

Give Us Feedback

Want to give us some feedback on the show? We’re always looking for ideas or suggestions that will help improve each episode. Please contact us at feedback __at__ thisweekindjango.com.

Show Notes

Doug Napoleone on PyCon 2008 (2:27)

• Dougma – Doug’s blog.
• PyCon-Tech

Doug is Software Coordinator and Webmaster for PyCon 2008 and lead developer and maintainer for PyCon-Tech.

Doug touches on the following subjects. Lots of great information in the show. If you’re going to PyCon you want to be sure to get the scoop.

1. What’s not new this year.

2. Whats new this year. (Program guide, longer lunches, more lightning talks, vendor booths)

3. Social events (Python Lab, Board games, bag stuffing, Galcon Tournament)

4. Record attendance (And the registration problems we had)

5. Beyond the talks: (Open Space, 5th track (hallway), evening parties, Sprints)

6. Future of PyCon: (what do we do now that we have attendance breaking the 1K mark)

7. Getting there and Getting Home.

8. A brief intro to PyCon-Tech and some of the great hidden gems in there.

Win Cool Stuff Contest (43:38)

We appreciate all the submissions to the Win Cool Stuff Contest. All valid submissions will be recognized on future episodes. Our winners will have the option of appearing on the show to discuss their winning submission.

Watch the winners drawn live

The winners are:

• The Definitive Guide to Django: Web Development Done Right – Congratulations to Francis Cleary for his submission “Multiple view prefixes”.

• Django T-Shirt – Congratulations to Paul Kenjora for his submission “Adding Custom Actions To Django Admin Change Forms”.

Special thanks go to Apress and Eminent Consulting Group for donating the prizes.

This Week at PyCon (48:34)

For the This Week in Django podcast we will be doing the following:

• PyCon Unwind – Nightly one hour podcasts on our experience of the day. Get three or more other attendees to join us. We will do our best to slap these up on the web every day. If you want to hang out or get in on the Unwind we’ll Pownce it when / where. Free beer—hang out and have fun. We’ll be in the Dorval Int’l from 7PM to 8:30PM.

• Impromptu Chats – Chats with people in the hallways, or wherever, etc…

• Interviews – We are working to coordinate some interviews but since everyone is very busy at PyCon this may or may not happen.

The main thing is we are going to keep thing flexible.

Thank You! (54:26)

• Django.June – an unconference.

• Oebfare – Brian Rosner’s excellent blog.

• django-sqlalchemy – project to integrate Django’s models into SQLAlchemy’s ORM.

We appreciate all the submissions to the Win Cool Stuff Contest. All valid submissions will be recognized on future episodes. Our winners will have the option of appearing on the show to discuss their winning submission.

In true Django fashion I created a Django application that was used to draw the winners. You can watch the screencast here:

Watch the winners drawn live

The winners are:

• The Definitive Guide to Django: Web Development Done Right – Congratulations to Francis Cleary for his submission “Multiple view prefixes”.

• Django T-Shirt – Congratulations to Paul Kenjora for his submission “Adding Custom Actions To Django Admin Change Forms”.

Special thanks go to Apress and Eminent Consulting Group for donating the prizes.

This Week in Django is a weekly podcast about all things Django.

This week we are privileged to have Malcolm Tredinnick, Django core developer, on the show to talk to us about working on Django, the Queryset Refactor branch, and some of his writing. We also discuss a few source commits, some cool projects from the community, and the Win Cool Stuff Contest.

You don’t want to miss this one!

Please see the Show Notes below for all the pertinent information and links

Downloads

AAC Enhanced Podcast (55.2 MB, 01:09:07, AAC)

MP3 Edition (47.5 MB, 01:09:07, MP3)

OGG Edition (37.7 MB, 01:09:07, Vorbis)

The Enhanced Podcast version contains screenshots and easy access links to all of the items we discuss throughout the podcast.

Feeds Available

iTunes Feeds are available. By subscribing using the iTunes feeds the podcasts will automatically be downloaded for you when we release them.

iTunes Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

Regular RSS Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

This Week in Django – OGG Edition

Give Us Feedback

Want to give us some feedback on the show? We’re always looking for ideas or suggestions that will help improve each episode. Please contact us at feedback __at__ thisweekindjango.com.

Show Notes

Django Interview – Malcolm Tredinnick (0:34)

• Malcolm Tredinnick on Django People.
• Defying Classification Blog – Be sure to put Malcolm’s blog in your feed reader. Lots of excellent insight and humorous writing.

• Gnome Project
• Simon Willison’s Weblog

• Distributed Version Control Systems
  • Git Distributed Version Control
  • Mercurial Distributed Version Control
  • Koz Speaks On Git

• Queryset Refactor Branch
  • GeoDjango Branch
  • Defer Ticket (5420) – allows deferring the loading of data on expensive fields.
  • SqlAlchemy – Python ORM.

• Speaking and Writing
  • Preparing For The Next Django Sprint – excellent post describing how best to prepare for a Django sprint.
  • linux.conf.au – annual linux conference in Australia.
  • Malcolm’s Slides from LCA Presentations

Tracking Trunk (39:53)

• Decorators take the name, attributes, and docstring of the function they decorate (7153) – Note, this change is backwards incompatible if, for some reason, you were relying on the name of a Django decorator instead of the function it decorates.
• Lazy related objects supported (7158) – Now, in addition to ForeignKey("Model") you can also say ForeignKey("app.Model"). This means that cross-app recursive relations now work.
• sys.exit() will no longer get swallow by http handler (7168) – a sys.exit() in the view code will now actually exit by raising. Allow customization of language cookie name (7185) – Adds new setting LANGUAGE_COOKIE_NAME that is the name of the cookie to use for the language cookie. This can be whatever you want (but should be different from SESSION_COOKIE_NAME).
• Custom labels for choices in ModelChoiceField (4620)

Community Catchup (54:33)

• Win Cool Stuff Contest – Submit a Tip of the Week or an IRC Ad Nauseam item, including question and answer and we will enter your name into our drawing to win one of our two cool prizes. See the post for full details:
  • The Definitive Guide to Django: Web Development Done Right. The “Django Book”. A must read for every Django developer. Graciously provided by Apress.
  • Django T-Shirt – a very cool t-shirt with the Django logo on it. Provided by Eminent Consulting Group.

• Why ‘Where Everyone Goes’ Crashed – very interesting post about scaling a large Django site.
  • MintCache Snippet
• Managers Versus Class Methods – another great post by James Bennett. Wondering which to use, read on.
• pownce-jabber-bot a cool project by Jannis Leidel that implements a jabber bot for pownce implemented as a Django app. Discussed in this blog post

Thank You! (1:06:38)

On This Week in Django this week (to be released shortly) we discussed the Win Cool Stuff Contest. I’m breaking this out here so that people who do not follow the podcast have an opportunity to know about the contest.

How It Works

Submit a Tip of the Week or an IRC Ad Nauseam item. If you’re unfamiliar with either of these then please listen to past episodes of This Week in Django. Submissions must contain the following:

• Including question and answer, or in the case of Tip of the Week, the actual tip.
• Include a paragraph or two and relevant code samples. Look at past Tip of the Week or IRC Ad Nauseam items for examples.
• Must not be items already include on the Django FAQ, the Django IRC FAQ, or something we’ve included in past shows (yes, you’re helping us come up with new material).
• Your submission constitutes permission for us to use the content in future podcasts. We will give you credit, so no worries.
• You can enter multiple times, but each submission must be different.
• All submissions must be received by 10:00:00 p.m. GMT Friday March 7, 2008 (5PM EST).
• Remember to include your name and email address. If you would like us to mention it, also include your Blog and/or Django People URL.
• Send all submissions to feedback __at__ thisweekindjango.com.

Prizes

All valid submissions are eligible to win. We will draw two winners. No substitutes (if you have the book or the shirt give it to your neighbor.) The following items have been generously donated to the show.

• The Definitive Guide to Django: Web Development Done Right. The “Django Book”. A must read for every Django developer. Graciously provided by Apress.

• Django T-Shirt – a very cool t-shirt with the Django logo on it. Provided by Eminent Consulting Group.

Winners

We will announce the winners on this blog and on next week’s show. If you can work around our schedule you can discuss your item on the show. If not and you have the opportunity to prerecord your item, we will include it in the podcast. If you are a winner we will cover this with you further.

This Week in Django is a weekly podcast about all things Django.

This week we discuss a few source commits, some great blog posts, the new django-dev IRC Channel and the IRC Channel Logger, the Tip of the Week, and a couple of items from the IRC channel.

Please see the Show Notes below for all the pertinent information and links

Downloads

AAC Enhanced Podcast (38.5 MB, 46:03, AAC)

MP3 Edition (31.7 MB, 46:03, MP3)

OGG Edition (25.1 MB, 46:03, Vorbis)

The Enhanced Podcast version contains screenshots and easy access links to all of the items we discuss throughout the podcast.

Feeds Available

iTunes Feeds are available. By subscribing using the iTunes feeds the podcasts will automatically be downloaded for you when we release them.

iTunes Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

Regular RSS Feeds

This Week in Django – AAC Edition

This Week in Django – MP3 Edition

This Week in Django – OGG Edition

Give Us Feedback

Want to give us some feedback on the show? We’re always looking for ideas or suggestions that will help improve each episode. Please contact us at feedback __at__ thisweekindjango.com.

Show Notes

Big News (1:01)

• PyCon Early Bird Registration has passed – Get signed up soon so you don’t miss out on this very cool event.

Tracking Trunk (1:46)

• Corrected Problem with Subclassed Field (7133) – Subclassing a Model field should assume that it is using the same database column type.

• Fixed Searching on IP Fields on PostgreSQL (7151) – Thanks to Matt McClanahan this corrects a problem with trying to do searching against IP Field types on PostgreSQL.

• Fixed ‘1st of January’ comparisons for SQLite (7150) – Special case for SQLite to handle detecting the first of January.

Community Catchup (8:25)

• #django-dev IRC Channel
  • Google Groups Posting

• django-evolution – database schema evolution for Django projects.

• Editing multiple objects in Django with newforms – Great post by Collin Grady demonstrating how to edit multiple items with NewForms.
  • Django Tip: Complex Forms – similar post by Malcolm Tredinnick

• Hosting a Django Site with Pure Python – Great post by Eric Florenzano that discusses using CherryPy with Django.

• Python Magazine Looking for Writers – If you’re interested in getting your name in print, contact them. Additionally, the inaugural issue from October 2007 is available for free on their Web site. If you sign up for a free account, the download link will appear in list of issues available for download there.
  • PyMOTW – Python Module of the Week.

Tip of the Week (26:08)

Overriding ModelChoiceField Labels – A solution for modifying how the labels in a select box appear. Read Brian Rosner’s excellent post on the topic.

IRC Ad Nauseam (30:42)

Django IRC FAQ

Backwards Incompatible Changes Information

Django Bot

• New Django IRC Channel Logger – The old one died, we promised you a new one. Enjoy! We’re doing it in true iterative fashion. If there is functionality you’d like to see let us know. Other channels being logged can be found here

I am creating a custom template tag, how do I get access to my template variables in my new custom template tag?

• Django Documentation on passing template variables to the tag
• All arguments to the tag are unpacked as string literals.
• Resolve the string arguments to their context variable form (such as converting the string element back into a Post instance object) by using the template.Variable class.
• In the Development version the Variable class is used instead of the resolve_variable function. Changeset 6399 made this change.

I just created a Custom Management Command Extension and it’s not showing up in the list when I type ./manage.py help. What’s the problem?

There is a bug in the Custom Management Commands where it will not find and register commands if the INSTALLED_APPS setting refers to project_name.app_name. So for the time being you need to refer to these apps that have custom management commands in them by just using app_name.

• Django Documentation on Custom Management Commands
• Two tickets related to this issue:
  • Ticket 5825
  • Ticket 6128
• Custom Management Commands Screencast
• Custom Management Commands Cheatsheet
• django-command-extensions – Open source project to collect a bunch of custom commands in one app.

Thank You! (43:51)