在django中通过url传递列表 [英] Passing a list through url in django

问题描述

我想通过URL传递列表。但是当我试过，我有一些错误。那我该怎么办呢有人请帮助我..

这是我的观点

  def add_student（request）：
 
如果request.method =='POST'：
 student_list = [] 
 student_name = request.POST.getlist（'student_name'）
 student_phone = request.POST.getlist（'student_phone'）
 
 zipped = zip（student_name，student_phone）
 
 for student_name，student_phone在压缩包中：
 
 student_object =学生（
 student_name = student_name，
 student_phone = student_phone 
）
 student_object.save（）
 
 student_list.append（student_object.id ）
 
 return HttpResponseRedirect（reverse（'students：view_students'，args = student_list））
 **＃在上面的代码中，它抛出一些错误** 
 else：
 return render（request，'students / add_student。 html'）
 
 
 def view_students（request，student_list = None）
如果student_list：
 instances = Student.objects.filter（id__in = student_list）
 else = 
 instance = Student.objects.filter（）
 context = {} 
上下文['instances'] =实例
 
返回渲染（请求， 'students / view_all_student.html'，上下文）
  

这是我的url：

  url（r'^ view-students /（？P< student_list> \w +）/ $'，views.view_students，name ='view_students' ），
  

这是我收到的错误。

$ / $ / $ / $ /

使用参数'（14，15）'和关键字参数'{ }' 未找到。尝试了1种模式：[u'app / product / view-products /（？P< pd_list>。*）/ $']

这里（14,15）是列表项。

如果问题不正确。有人请纠正这个问题。

解决方案

如果你想做的是渲染一个列表，你应该这样做。 >

  def add_student（request）：
如果request.method =='POST'：
 student_list = [] 
 student_name = request.POST.getlist（'student_name'）
 student_phone = request.POST.getlist（'student_phone'）
 
 zipped = zip（student_name，student_phone）
 
为student_name，student_phone在压缩中：
 student = Student.objects.create（student_name = student_name，
 student_phone = student_phone）
 student_list.append（student）
 
 return render（request，'students / view_all_student.html'，{'instances'：student_list}）
 else：
 return render（request，'students / add_student.html'）
  

但是，您的问题似乎关注用户双重发布此请求。要解决这个问题，您可以将它们作为参数传递

  def add_student（request）：
 if request.method = ='POST'：
 student_list = [] 
 student_name = request.POST.getlist（'student_name'）
 student_phone = request.POST.getlist（'student_phone'）
 
 zipped = zip（student_name，student_phone）
 
 for student_name，student_phone在压缩中：
 student = Student.objects.create（student_name = student_name，
 student_phone = student_phone） 
 student_list.append（str（student.id））
 
 redirect = HttpResponseRedirect（reverse（'students：view_students'））
 redirect ['Location'] + ='& ;'。join（['students = {}'。format（x）for x in student_list]））
 return redirect 
 else：
 return render（request，'students / add_student。 html'）
 
 def view_students（reques t）：
 students = request.GET.getlist（'students'）
如果学生：
 students = [int（x）for x in students] 
 instances =学生。 objects.filter（id__in = students）
  

I want to pass a list through the url. But when i tried, i got some errors. So how can i do that. Somebody please help me..

this is my view

def add_student(request):

    if request.method == 'POST':
        student_list = []
        student_name = request.POST.getlist('student_name')
        student_phone = request.POST.getlist('student_phone')

        zipped = zip(student_name,student_phone)

        for student_name,student_phone in zipped:

            student_object = Student(
                                student_name=student_name,
                                student_phone=student_phone
                            )
            student_object.save()

            student_list.append(student_object.id)

        return HttpResponseRedirect(reverse('students:view_students', args=student_list))
**# in the above code it throwing some errors** 
    else:
        return render(request,'students/add_student.html')


def view_students(request,student_list=None):
    if student_list:
        instances = Student.objects.filter(id__in=student_list)
    else:
        instances = Student.objects.filter()
    context = {}
    context['instances'] = instances

    return render(request,'students/view_all_student.html',context)

this is my url :

url(r'^view-students/(?P<student_list>\w+)/$',views.view_students, name='view_students'),

this is the error i got.

NoReverseMatch at /app/product/add-product/

Reverse for 'view_products' with arguments '(14, 15)' and keyword arguments '{}' not found. 1 pattern(s) tried: [u'app/product/view-products/(?P<pd_list>.*)/$']

here (14,15) are the list items.

If the question is not correct. Somebody please correct the question.

解决方案

If all you want to do is render a list you should just do that.

def add_student(request):
    if request.method == 'POST':
        student_list = []
        student_name = request.POST.getlist('student_name')
        student_phone = request.POST.getlist('student_phone')

        zipped = zip(student_name,student_phone)

        for student_name,student_phone in zipped:
            student = Student.objects.create(student_name=student_name,
                                             student_phone=student_phone)
            student_list.append(student)

        return render(request,'students/view_all_student.html', {'instances': student_list})
    else:
        return render(request,'students/add_student.html')

However, Your issue seems to be concerned with users double posting this request. To remedy this you could pass them as a get parameter

def add_student(request):
    if request.method == 'POST':
        student_list = []
        student_name = request.POST.getlist('student_name')
        student_phone = request.POST.getlist('student_phone')

        zipped = zip(student_name,student_phone)

        for student_name,student_phone in zipped:
            student = Student.objects.create(student_name=student_name,
                                             student_phone=student_phone)
            student_list.append(str(student.id))

        redirect = HttpResponseRedirect(reverse('students:view_students'))
        redirect['Location'] += '&'.join(['students={}'.format(x) for x in student_list]))
        return redirect
    else:
        return render(request,'students/add_student.html')

def view_students(request):
    students = request.GET.getlist('students')
    if students:
        students = [int(x) for x in students]
        instances = Student.objects.filter(id__in=students)

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