我有一个带有自定义构造函数的模型表单。它检查是否需要文件,如果为假,则删除文件字段。它还有两个隐藏字段,我在视图中对其进行了初始化。表单类如下:
class SubmitTask(forms.ModelForm):
task = forms.ModelChoiceField(queryset=Task.objects.all(), widget=forms.HiddenInput())
student = forms.ModelChoiceField(queryset=UserProfile.objects.all(), widget=forms.HiddenInput())
def __init__(self, file_required=False, *args, **kwargs):
super(SubmitTask, self).__init__(*args, **kwargs)
if file_required is True:
file = forms.FileField(
label='Select a file',
help_text='max: 2.5 MB'
)
else:
del self.fields['file']
class Meta:
model = Submission
exclude = ('date_submitted',)
我的问题是在我初始化表单时填充了隐藏字段(我已经确认它的值确实是通过查看 HTML 代码初始化的)。但是,在 POST 请求期间不会填充隐藏字段的值。我在 POST 请求期间确认表单确实已绑定,并且我还在 Firebug 上确认 POST 还包含task
andstudent
值。这是我的相关方法views.py
def view_task(request, id):
task = Task.objects.get(pk=id)
profile = request.user.get_profile()
data = {}
data['classroom'] = task.get_classroom()
data['description'] = task.get_description()
teacher_classrooms = Classroom.objects.filter(teacher=profile)
teacher_tasks = Task.objects.filter(classroom__in=teacher_classrooms)
if not submission and task not in teacher_tasks:
form = SubmitTask(file_required=task.file_required, initial={'task':task.pk, 'student':profile.pk})
data['form'] = form
if request.method == 'POST':
form = SubmitTask(request.POST, request.FILES)
if form.is_valid():
form.save()
return render_to_response('classrooms/view_task.html',
data, context_instance=RequestContext(request))