验证表单集

Question

我得到了这个错误：ValidationError at /screen-many/ [u'ManagementForm data is missing or has been tampered with']，我认为这是由于我视图中的以下代码所致……

# e_pk_list is a list of id's that I got from POST
e_students = Student.objects.filter(pk__in=e_pk_list)
my_iterator = iter(e_students) # Each list item will correspond to a form.
SurveyFormset = formset_factory(SurveyForm, extra=len(e_students))

# Is this the tampering that I can't do??
SurveyFormset.form = staticmethod(curry(SurveyForm, item_iterator=my_iterator))

if request.method == 'POST':

    survey_formset = SurveyFormset(request.POST)

    if survey_formset.is_valid():
        for form in survey_formset:
            saved = form.save(commit=False)
            saved.surveyset = ss
            saved.save()
        return HttpResponseRedirect('/')
else:
    survey_formset = SurveyFormset()

谢谢

编辑:我想我应该提到我的模板中已经有了一个管理表单……

    <form action="" method="POST">{% csrf_token %}
        {{ survey_formset.management_form }}
        {% for form in survey_formset %}
            <div class="item">
              {% crispy form %}
            </div>
        {% endfor %}
        <input type="submit" value="Submit" class='button' />
    </form>

Answer 1

看起来你没有把management_form放到你的表单中。

将此代码放入显示SurveyFormset的html表单中

{{ SurveyFormset.management_form }}

Answer 2

一个表单集有很多种形式。Django使用management form data跟踪表单集中的表单数量。你也应该在模板中添加management_form，它应该与其他POST数据一起发布。

所以，你应该有：

<form method="POST" action=".">
    {{survey_formset.management_form}}
    {% comment %}Other form fields{% endcomment %}
</form>