django 按时间范围查询数据库实例代码

class book(models.Model):  
  name = models.CharField(max_length=50, unique=True) 
  date = models.DateTimeField() 
    
  def __unicode__(self): return self.name 

request.GET = {'year_from': 2010, 'month_from': 1, 'day_from': 1, 
        'year_to':2013, 'month_to': 10, 'day_to': 1}

import datetime 
 
def filter(request): 
  if 'year_from' and 'month_from' and 'day_from' and\ 
      'year_to' and 'month_to' and 'day_to' in request.GET: 
    y = request.GET['year_from'] 
    m = request.GET['month_from'] 
    d = request.GET['day_from'] 
    date_from = datetime.datetime(int(y), int(m), int(d), 0, 0) 
    y = request.GET['year_to'] 
    m = request.GET['month_to'] 
    d = request.GET['day_to'] 
    date_to = datetime.datetime(int(y), int(m), int(d), 0, 0) 
  else: 
    print "error time range!" 

import datetime 
 
def filter(request): 
  if 'year_from' and 'month_from' and 'day_from' and\ 
      'year_to' and 'month_to' and 'day_to' in request.GET: 
    y = request.GET['year_from'] 
    m = request.GET['month_from'] 
    d = request.GET['day_from'] 
    date_from = datetime.datetime(int(y), int(m), int(d), 0, 0) 
    y = request.GET['year_to'] 
    m = request.GET['month_to'] 
    d = request.GET['day_to'] 
    date_to = datetime.datetime(int(y), int(m), int(d), 0, 0) 
    book_list = book.objects.filter(date__range=(date_from, date_to)) 
    print book_list 
  else: 
    print "error time range!"