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magic-removal: Refs #1464 -- Cleaned up some stray tabs that leaked into r2632

git-svn-id: http://code.djangoproject.com/svn/django/branches/magic-removal@2633 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Russell Keith-Magee 2006-04-08 08:39:34 +00:00
parent d1083f15fb
commit f576187df6

View File

@ -187,29 +187,29 @@ in Tutorial 1. Here's one stab at the ``index()`` view, which displays the
latest 5 poll questions in the system, separated by commas, according to
publication date::
from myproject.polls.models import Poll
from django.http import HttpResponse
from myproject.polls.models import Poll
from django.http import HttpResponse
def index(request):
latest_poll_list = Poll.objects.all().order_by('-pub_date')
output = ', '.join([p.question for p in latest_poll_list])
return HttpResponse(output)
def index(request):
latest_poll_list = Poll.objects.all().order_by('-pub_date')
output = ', '.join([p.question for p in latest_poll_list])
return HttpResponse(output)
There's a problem here, though: The page's design is hard-coded in the view. If
you want to change the way the page looks, you'll have to edit this Python code.
So let's use Django's template system to separate the design from Python::
from django.template import Context, loader
from myproject.polls.models import Poll
from django.http import HttpResponse
from django.template import Context, loader
from myproject.polls.models import Poll
from django.http import HttpResponse
def index(request):
latest_poll_list = Poll.objects.all().order_by('-pub_date')
t = loader.get_template('polls/index')
c = Context({
'latest_poll_list': latest_poll_list,
})
return HttpResponse(t.render(c))
def index(request):
latest_poll_list = Poll.objects.all().order_by('-pub_date')
t = loader.get_template('polls/index')
c = Context({
'latest_poll_list': latest_poll_list,
})
return HttpResponse(t.render(c))
That code loads the template called "polls/index" and passes it a context. The
context is a dictionary mapping template variable names to Python objects.
@ -256,11 +256,11 @@ It's a very common idiom to load a template, fill a context and return an
``HttpResponse`` object with the result of the rendered template. Django
provides a shortcut. Here's the full ``index()`` view, rewritten::
from django.shortcuts import render_to_response
from myproject.polls.models import Poll
from django.shortcuts import render_to_response
from myproject.polls.models import Poll
def index(request):
latest_poll_list = Poll.objects.all().order_by('-pub_date')
def index(request):
latest_poll_list = Poll.objects.all().order_by('-pub_date')
return render_to_response('polls/index', {'latest_poll_list': latest_poll_list})
Note that we no longer need to import ``loader``, ``Context`` or
@ -278,12 +278,12 @@ for a given poll. Here's the view::
from django.http import Http404
# ...
def detail(request, poll_id):
try:
p = Poll.objects.get(pk=poll_id)
except Poll.DoesNotExist:
raise Http404
return render_to_response('polls/detail', {'poll': p})
def detail(request, poll_id):
try:
p = Poll.objects.get(pk=poll_id)
except Poll.DoesNotExist:
raise Http404
return render_to_response('polls/detail', {'poll': p})
The new concept here: The view raises the ``django.http.Http404``
exception if a poll with the requested ID doesn't exist.