Question

我是django和ajax的新手，所以我一直在研究一个项目来学习它。我有两个按钮，一个添加标记，另一个删除标记。

这是views.py

@csrf_exempt
def save(request):
    searchVar = request.POST.getlist('search[]')
    waypoint = Waypoint()
    waypoint.name = searchVar[0]
    waypoint.geometry = ('POINT(' + searchVar[2] + " " + searchVar[1] + ')')
    waypoint.save()
    return HttpResponse(json.dumps(dict(isOk=1)), content_type='application/json')

@csrf_exempt
def remove(request):
    objectID = request.POST.get('id')
    point = get_object_or_404(Point, pk = objectID)
    point.delete()

这是urls.py

from django.conf.urls import patterns, url, include

urlpatterns = patterns('googlemaps.waypoints.views',
    url(r'^$', 'index', name='waypoints-index'),
    url(r'', 'save', name='waypoints-save'),
    url(r'', 'remove', name='waypoints-remove'),
)

这里是来自js文件的ajax

    $('#saveWaypoints').click(function () {
    var searchList = [search.name, search.geometry.location.lat(), search.geometry.location.lng()]
    $.ajax({
      url : "waypoints-save",
      type : "POST",
      data : { search : searchList }
    }, function (data) {
        if (data.isOk) {
            $('#saveWaypoints');
        } else {
            alert(data.message);
        }
    });
});
$('#removeWaypoints').click(function () {
  console.log(markerID);
    $.ajax({
      url : "waypoints-remove",
      type : "POST",
      data : { id : markerID }
    }, function (data) {
        if (data.isOk) {
            $('#removeWaypoints');
        } else {
            alert(data.message);
        }
    });
});

保存按钮工作正常，但是当我点击删除按钮时，我在控制台日志中出现此错误

POST http://127.0.0.1:8000/waypoints-remove 500 (Internal Server Error)

IndexError at /waypoints-remove
list index out of range

Request Method: POST
Request URL: http://127.0.0.1:8000/waypoints-remove

我的服务器cmd中出现此错误

Internal Server Error: /waypoints-remove
Traceback (most recent call last):
  File "C:\Users\rnvitter\virtualenv4\myvenv\lib\site-packages\django\core\handlers\base.py", line 149, in get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\rnvitter\virtualenv4\myvenv\lib\site-packages\django\core\handlers\base.py", line 147, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\rnvitter\virtualenv4\myvenv\lib\site-packages\django\views\decorators\csrf.py", line 58, in wrapped_view
    return view_func(*args, **kwargs)
  File "C:\Users\rnvitter\virtualenv4\googlemaps\googlemaps\waypoints\views.py", line 23, in save
    waypoint.name = searchVar[0]
IndexError: list index out of range
2017-01-09 22:40:11,781 - ERROR - Internal Server Error: /waypoints-remove
Traceback (most recent call last):
  File "C:\Users\rnvitter\virtualenv4\myvenv\lib\site-packages\django\core\handlers\base.py", line 149, in get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\rnvitter\virtualenv4\myvenv\lib\site-packages\django\core\handlers\base.py", line 147, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\rnvitter\virtualenv4\myvenv\lib\site-packages\django\views\decorators\csrf.py", line 58, in wrapped_view
    return view_func(*args, **kwargs)
  File "C:\Users\rnvitter\virtualenv4\googlemaps\googlemaps\waypoints\views.py", line 23, in save
    waypoint.name = searchVar[0]
IndexError: list index out of range

这让我相信来自删除按钮ajax调用的数据被发送到我的保存视图，有人知道吗？

Answer 1

您的urls.py文件设置错误。第一个参数是匹配URL的正则表达式，因此^$将匹配根路径。 name参数用于获取特定视图的URL，例如当您使用reverse函数时。

^表示一行的开头，$表示一行的结尾。在它们之间没有任何东西，它将匹配一个空行。

要匹配其他网址，例如/waypoints-save/，您需要编写另一个正则表达式：^/waypoints-save/$。这将匹配行的开头，后跟字符/waypoints-save/，然后是行的结尾。要正确设置整个urls.py，它应如下所示：

from django.conf.urls import patterns, url, include

urlpatterns = patterns('googlemaps.waypoints.views',
    url(r'^$', 'index', name='waypoints-index'),
    url(r'^/waypoints-save/$', 'save', name='waypoints-save'),
    url(r'^/waypoints-remove/$', 'remove', name='waypoints-remove'),
)

Answer 2

您已定义了两个具有相同正则表达式的URL条目。

url(r'', 'save', name='waypoints-save'),
url(r'', 'remove', name='waypoints-remove'),

由于/waypoints-remove将匹配r''（正则表达式中没有任何内容，因此它将匹配任何内容），第一个匹配获胜，并执行save方法。因此，您预期运行的方法remove未被运行。

AJAX数据被发送到错误的Django视图

2 个答案: