Django视图未返回HttpResponse对象

Question

I'm having an issue with getting ajax to work with my django view. The exact error is

CustomMembers.decorators.formquestioninfo didn't return an HttpResponse object. It returned None instead.

The view is limited by a custom decorator which is the following.

def is_god_admin(f):
    def wrap(request, *args, **kwargs):
        # This checks to see if the user is a god admin. If they are not, they get thrown to their profile page
        if 'userID' not in request.session.keys() and 'username' not in request.session.keys():
            return HttpResponseRedirect("/Members/Login")
        else:
            # lets check the roleID to what ID we need.
            god_admin = Roles.objects.get(role_name='System Admin')
            if request.session['roleID'] != god_admin.id:
                return HttpResponseRedirect("/Members/Profile/" + request.session['userID'])
            return f(request, *args, **kwargs)

    wrap.__doc__ = f.__doc__
    wrap.__name__ = f.__name__
    return wrap

The view right now only contains a return to show the template along with a check if ajax was used to post a request.

View

@is_god_admin
def formquestionsinfo(request, formid, catid, mainid):
    """ Displays the forms information."""
    # need the following values in both post and get methods

    forms = Form.objects.all()

    if request.is_ajax():
        print('ajax request') # this fires then errors
    else:
        return render(request, formquestions.html, 'forms':forms) # this works just fine with a get request

The ajax code that is being executes is: (the getCookie is based off of django documentation - Cross Site Request Forgery protection

$(document).ready(function(){
                $("#{{main_id}}_main_visible").click(function(e){
                    e.preventDefault();
                    var url = window.location.href;
                    $.ajax({
                      type:'get',
                      headers: {"X-CSRFToken": getCookie("csrftoken")},
                      url: url,
                      data: { mainid: {{main_id}} },
                      async: true,
                      cache: false
                    });
                });
            });

All help is really appreciated. Thanks gain.

Answer 1

return f(request, *args, **kwargs) calls the view function in the wrapper of the decorator. However, the branch for ajax requests only does a print and leaves the function without a return statement that returns a valid response object:

if request.is_ajax():
    print('ajax request') 
    ... # return a response object here to avoid returning None