Django 表单集 : Save multiple forms from formset

Question

我花了几天时间向表单集动态添加表单，我找到了一种方法来做到这一点。但是我对 forms saving 有一个小问题，因为它只保存第一个表单而不是 formset 中的所有表单。

这是我的表单集:

DocumentFormSets = inlineformset_factory(Publication, Document, form=DocumentForm, extra=1, max_num=4)

这是我的模板:

<fieldset>
    <legend class="title"><span class="name">{% trans 'Document form' %}</span></legend>
    {{ DocumentFormSet.management_form }}
    <div id="form_set">
      {% for form in DocumentFormSet.forms %}
        <div class='formset-document'>
          <table class='no_error'>
            <div class="row">
              <div class="col-xs-3">
                {{ form.title|as_crispy_field }}
              </div>
              <div class="col-xs-3">
                {{ form.language|as_crispy_field }}
              </div>
              <div class="col-xs-3">
                {{ form.format|as_crispy_field }}
              </div>
              <div class="col-xs-3">
                {{ form.upload|as_crispy_field }}
              </div>
            </div>
          </table>
        </div>
      {% endfor %}
    </div>
    <br>
    <input type="button" class="btn btn-default" value="Add More" id="add_more">
    <div id="empty_form" style="display:none">
      <table class='no_error'>
        <div class="row">
          <div class="col-xs-3">
            {{ DocumentFormSet.empty_form.title|as_crispy_field }}
          </div>
          <div class="col-xs-3">
            {{ DocumentFormSet.empty_form.language|as_crispy_field }}
          </div>
          <div class="col-xs-3">
            {{ DocumentFormSet.empty_form.format|as_crispy_field }}
          </div>
          <div class="col-xs-3">
            {{ DocumentFormSet.empty_form.upload|as_crispy_field }}
          </div>
        </div>
      </table>
    </div>
</fieldset>

这是我的 JS 部分:

$('#add_more').click(function () {
  var form_idx = $('#id_form-TOTAL_FORMS').val();
  $('#form_set').append($('#empty_form').html().replace(/__prefix__/g, form_idx));
  $('#id_form-TOTAL_FORMS').val(parseInt(form_idx) + 1);
});

这是我的 views.py 文件:

class PublicationCreateView(EdqmCreateView):
    """ Create publication with document form through formset """
    model = Publication
    template_name = 'freepub/publication/publication_form.html'

    def get_context_data(self, **kwargs):
        context = super(PublicationCreateView, self).get_context_data(**kwargs)
        context['DocumentFormSets'] = DocumentFormSets(self.request.POST or None, self.request.FILES or None)
        return context

    def form_valid(self, form):
        context = self.get_context_data()
        formsets = context['DocumentFormSets']
        if form.is_valid() and formsets.is_valid():
            self.object = form.save()
            formsets.instance = self.object
            formsets.save()
        return super(PublicationCreateView, self).form_valid(form)

但是有了这个函数，它只保存了我的表单集中的第一个文档表单:

我查看了 id 文档表单字段，我得到了这个:

第一个标题字段得到 id_documents-0-title 但是当我添加更多表单时，标题字段总是得到 id_documents-undefined-title

如何从表单集中保存我的文档表单？

谢谢!

编辑:

这是@HaiLang 问题的编辑:

这是我的self.request.POST:

<QueryDict: {'csrfmiddlewaretoken': ['0LHaaEG1dkyZmOnP3X7037tZI45QrQOIRrQQAMhiOoTyeohDwQdcdTt08yuqH86Z'], 'category': ['23'], 'pub_id': ['PUBSDDD-55'], 'title': ['TESTPUBLIE'], 'description': [''], 'doc-TOTAL_FORMS': ['1'], 'doc-INITIAL_FORMS': ['0'], 'doc-MIN_NUM_FORMS': ['0'], 'doc-MAX_NUM_FORMS': ['4'], 'doc-0-title': ['doc1'], 'doc-0-language': ['FR'], 'doc-0-format': ['pdf'], 'doc-undefined-title': ['doc2'], 'doc-undefined-language': ['FR'], 'doc-undefined-format': ['pdf'], 'doc-__prefix__-title': [''], 'doc-__prefix__-language': [''], 'doc-__prefix__-format': [''], 'doc-__prefix__-upload': ['']}>

这是我的console.log:

Element kt.fn.init {}

Answer 1

幸运的是，我最近才使用 FormSet，所以我可以看到相关代码的问题。

(由 Ducky 编辑。谢谢!)

您必须在 views.py 文件和 app.js 文件之间设置相同的 prefix。因为在您的 View 文件中您使用的是 prefix='doc' 并且在您的 javascript 函数中您使用了 form 前缀。

所以在你的 JQuery 文件中你必须写:

(function ($) {
$('#add_more').click(function () {
    var form_idx = $('#id_doc-TOTAL_FORMS').val();
    // For debugging the issue
    // console.log('Element', $('#id_doc-TOTAL_FORMS'), 'Num of forms', form_idx);
    $('#form_set').append($('#empty_form').html().replace(/__prefix__/g, form_idx));
    $('#id_doc-TOTAL_FORMS').val(parseInt(form_idx) + 1);
    console.log('Element', $('#id_doc-TOTAL_FORMS'));
});
})(jQuery)

你可以像这样覆盖你的 View :

class PublicationCreateView(CreateView):
    """ Create publication with document form through formset """
    model = Publication
    template_name = 'publication_form.html'

    def get_context_data(self, **kwargs):
        context = super(PublicationCreateView, self).get_context_data(**kwargs)
        document_queryset = Document.objects.all()
        context['DocumentFormSets'] = DocumentFormSet(self.request.POST or None, self.request.FILES or None, prefix='doc', queryset=document_queryset)
        return context

    def form_valid(self, form):
        context = self.get_context_data()
        formsets = context['DocumentFormSets']
        // For debugging
        // print(self.request.POST)
        if form.is_valid() and formsets.is_valid():
            self.object = form.save()
            formsets.instance = self.object
            formsets.save()
        return super(PublicationCreateView, self).form_valid(form)