第一次使用django，我也不确定以后会用上它，不过不管什么第一次都是有意义的。。虽然是跟着文档的First steps写的，还是决定记录一下，以记念这一刻。。

model.py:

from django.db import models
import datetime

# Create your models here.
class Poll(models.Model):
    question = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')

    def was_published_today(self):
        return self.pub_date.date() == datetime.datetime.today()
    was_published_today.short_description = 'Published today?'

    def __unicode__(self):
        return self.question

class Choice(models.Model):
    poll = models.ForeignKey(Poll)
    choice = models.CharField(max_length=200)
    votes = models.IntegerField()

    def __unicode__(self):
        return self.choice

view.py

# Create your views here.
#from django.template import Context, loader
#from django.http import HttpResponse, Http404
from django.core.context_processors import csrf
from django.shortcuts import render_to_response,get_object_or_404
from django.http import HttpResponseRedirect
from django.core.urlresolvers import reverse
from mydjango.polls.models import Poll, Choice

def index(request):
    latest_poll_list = Poll.objects.all().order_by('-pub_date')[:5]
    #t = loader.get_template('index.html')
    #c = Context({
    #    'latest_poll_list':latest_poll_list,
    #})
    #return HttpResponse(t.render(c))

    return render_to_response('index.html' ,
        {'latest_poll_list': latest_poll_list})

def detail(request, poll_id):
    #try:
    #    p = Poll.objects.get(pk=poll_id)
    #except Poll.DoesNotExist:
    #    raise Http404
    p = get_object_or_404(Poll, pk=poll_id)
    c = {'poll': p}
    c.update(csrf(request))
    return render_to_response('detail.html', c)

def vote(request, poll_id):
    p = get_object_or_404(Poll, pk=poll_id)

    try:
        selected_choice = p.choice_set.get(pk=request.POST['choice'])
    except (KeyError, Choice.DoesNotExist):
        return render_to_response('detail.html',{
            'poll': p,
            'error_message': "You didn't select a choice.",
        })
    else:
        selected_choice.votes += 1
        selected_choice.save()
        #return HttpResponseRedirect(reverse('mydjango.polls.views.results', args=(p.id,)))
        return HttpResponseRedirect(reverse('poll_results', args=(p.id,)))

def results(request, poll_id):
    p = get_object_or_404(Poll, pk=poll_id)
    return render_to_response('results.html', {'poll':p})