Method based views in django applications

Aug 23, 20120 likes363 views

This document discusses method-based views in Django applications. It introduces the concept of creating reusable Django applications that can be deployed multiple times by mounting the application at different URL paths. This allows each instance to have its own configuration and state. An example application called Tournament Control is discussed, which is used to manage sporting competitions across multiple venues. The document demonstrates how to create a reusable base application class that defines URLs and views as methods, and can then be subclassed and configured for each deployment instance.

Method-based views
in Django applications
Gary Reynolds
Touch Technology

@goodtune
bitbucket.org/goodtune
github.com/goodtune

Refresher

• Last time we looked at building up a library
which will help save us some boilerplate
• It incorporated better form ﬁelds, simple
decorated mixins to enforce
authentication, and a few other niceties

This time
• What if we need to deploy the same
application multiple times?
• In our URLconf we could point to the
applications urls.py as many times as we
need...
from django.conf.urls.defaults import patterns, url

urlpatterns = patterns('',
url(r'^usual-use/', 'myapp.urls'),
url(r'^it/makes/sense/here/too/', 'myapp.urls'),
)

Issues
• If your application requires conﬁguration at
run-time, you probably use a custom
settings.MYAPP_VAR or similar?
• That will usually apply globally, not per
mount point.
• If the application was an instance with it’s
own state, the issue goes away.

Basic anatomy
class MyApp(object):

def __init__(self, name='myapp', app_name='myapp'):
self.name = name
self.app_name = app_name

def get_urls(self):
urlpatterns = patterns('',
url(r'^$', self.index, name='index'),
)

@property
def urls(self):
return self.get_urls(), self.app_name, self.name

def index(self, request):
return HttpResponse('')

Horses for courses
• This book store is missing a view for the
details of a book.
• It really is an admin application, allowing
authenticated creation and updating of
Book instances by authenticated users.
• Lets use inheritance to split the
functionality.

Real world example
• Tournament Control is an application for
managing sporting competitions
• Scheduling ﬁxtures
• Allocating matches to grounds &
timeslots
• Recording results and automatic ladder
updates

Tournament Control
• Shameless plug
• http://www.sydney.touch.asn.au/
• http://www.touchsuperleague.org.uk/
• http://www.touchworldcup2011.co.uk/
• We’re interested in Touch Superleague
because they run multiple application
instances - they have venues in Edinburgh,
Cardiff, and Jersey.

Method based views in django applications

Lets look at
the front-end

www.touchsuperleague.org.uk/edinburgh/draws-ladders

• Sample project can be obtained from
bitbucket.org

• bitbucket.org/goodtune/sydjango-
example-two

• This presentation can be downloaded from
SlideShare

• slideshare.net/goodtune/method-based-
views-in-django-applications-14050952

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Method based views in django applications

1. Method-based views in Django applications Gary Reynolds Touch Technology @goodtune bitbucket.org/goodtune github.com/goodtune

2. Refresher • Last time we looked at building up a library which will help save us some boilerplate • It incorporated better form ﬁelds, simple decorated mixins to enforce authentication, and a few other niceties

3. This time • What if we need to deploy the same application multiple times? • In our URLconf we could point to the applications urls.py as many times as we need... from django.conf.urls.defaults import patterns, url urlpatterns = patterns('', url(r'^usual-use/', 'myapp.urls'), url(r'^it/makes/sense/here/too/', 'myapp.urls'), )

4. Issues • If your application requires conﬁguration at run-time, you probably use a custom settings.MYAPP_VAR or similar? • That will usually apply globally, not per mount point. • If the application was an instance with it’s own state, the issue goes away.

5. Basic anatomy class MyApp(object): def __init__(self, name='myapp', app_name='myapp'): self.name = name self.app_name = app_name def get_urls(self): urlpatterns = patterns('', url(r'^$', self.index, name='index'), ) @property def urls(self): return self.get_urls(), self.app_name, self.name def index(self, request): return HttpResponse('')

6. Let’s see it in practice

7. Horses for courses • This book store is missing a view for the details of a book. • It really is an admin application, allowing authenticated creation and updating of Book instances by authenticated users. • Lets use inheritance to split the functionality.

8. Subclass our application

9. Real world example • Tournament Control is an application for managing sporting competitions • Scheduling ﬁxtures • Allocating matches to grounds & timeslots • Recording results and automatic ladder updates

10. Tournament Control • Shameless plug • http://www.sydney.touch.asn.au/ • http://www.touchsuperleague.org.uk/ • http://www.touchworldcup2011.co.uk/ • We’re interested in Touch Superleague because they run multiple application instances - they have venues in Edinburgh, Cardiff, and Jersey.

12. Lets look at the front-end www.touchsuperleague.org.uk/edinburgh/draws-ladders

13. Questions?

14. • Sample project can be obtained from bitbucket.org • bitbucket.org/goodtune/sydjango- example-two • This presentation can be downloaded from SlideShare • slideshare.net/goodtune/method-based- views-in-django-applications-14050952

Method based views in django applications

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