在表单中,有两个字段:
class Input(models.Model):
start_year=models.CharField(max_length=100)
start_month=models.CharField(max_length=100)
end_year=models.CharField(max_length=100)
end_month=models.CharField(max_length=100)
....
在sql数据库中,有两列:year;一个月……
我想根据用户在表单中输入的内容(start_year,start_month; end_year,end_month)作为在数据库中过滤的日期范围(年,月).
XX.objects.filter(date_range = []),还是可以放入这个data_range函数?
如果需要,以下是一些相关代码.
用户输入数据的表单应用程序 – views.py
def input(request):
if request.method == 'POST':
form = InputForm(request.POST)
if form.is_valid():
...
start_year=form.cleaned_data['start_year']
start_month=form.cleaned_data['start_month']
end_year=form.cleaned_data['end_year']
end_month=form.cleaned_data['end_month']
...
form.save()
return redirect('FilterResult')
根据用户的条目过滤数据库 – views.py
class XXXView(ListView):
context_object_name = 'XXX'
template_name = 'XXX.html'
queryset = XXX.objects.all()
start_year=self.request.query_params.get('start_year', None) /*get from the form what the user has entered
start_month=self.request.query_params.get('start_month', None)
end_year=self.request.query_params.get('end_year', None)
end_month=self.request.query_params.get('end_month', None)
objects.filter(date_range=[.....]) /*how to concatenate the year and month to put here?
if start_year,start_month,end_year,end_month are not None:
queryset=queryset.filter(start_month=start_month,start_year=start_year,end_year=end_year,end_month=end_year)
sales=XXX.objects.filter(queryset).aggregate(Sum('sales'))
def get_context_data(self, **kwargs):
context = super(XXXView, self).get_context_data(**kwargs)
context['input'] = Input.objects.order_by('-id')[:1]
return context
最佳答案 如果您使用DateField而不是CharField(我认为您应该这样做,因为您正在处理日期),如下所示:
class Input(models.Model):
# This date has the month and the year. You can set the default day
# to the 1st of every month for consistency.
startDate=models.DateField()
# This also has the end month and end year.
endDate=models.DateField()
您可以按照以下方式执行以下操作来按范围过滤日期对象:
Input.objects.filter(startDate__range=["2011-01-01", "2011-01-31"])
或者,如果您想按特定月份过滤,您可以:
Input.objects.filter(endDate__year='2011', endDate__month='01')
有关更多信息,请参阅此帖子:Django database query: How to filter objects by date range?和此帖子:How do I subtract two dates in Django/Python?.
我不太确定你想要完成什么,但我确信如果你使用DateField而不是CharField来保存日期,那就容易多了.我还建议您阅读有关DateField的文档以获取更多信息(它可以在您的情况下派上用场).