Django Model Form在填写AJAX数据时不保存到数据库

Question

我正在尝试使用模型表单将数据从ajax调用保存到数据库。我认为问题是表单无效，因为代码运行时会打印test。

这是基于类视图的Post部分

def post(self, request):

    set_name = request.POST.get('set_name', None)

    form = SetCreate(request.POST)
    if form.is_valid():
        instance = form.save(commit = False)
        instance.name = set_name
        teacher = Teacher.objects.get(user = request.user)
        instance.teacher = teacher
        instance.save()
    else:
        print('test')

这是表格：

class SetCreate(forms.ModelForm):
    class Meta:
        model = Set
        fields = ('name',
                'teacher',
                'students')

这是AJAX：

function send(){
    var set_name = $('#class_name').val();
    //console.log(ids)
    //console.log(set_name)
    var url = window.location.pathname;
    ids = JSON.stringify(ids)
    $.ajax({
        method: "POST",
        url: url,
        data: {
            'set_name': set_name,
            'student_ids': ids,
            },
        dataType: 'json',
        success: function (data) {
            //location.href = data.url;//<--Redirect on success
        }
        });
}

感谢您的帮助！