无法保存使用内联实现的多关系的实例对象

在我的应用程序中，我想实现用户可以选择创建具有多个产品的预订的功能 . My problem is that despite the fact that I can create the inline form it is not possible to save the instance referring to preorder in my view.py

我的表单显示为Preorder模型，我的formset显示为Preorder_Has_Products relationshp .

预购和产品是具有以下关系的模型：

models.py

class Preorder(models.Model):
    client = models.ForeignKey(Client,verbose_name=u'Πελάτης')
    preorder_date = models.DateField("Ημ/νία Προπαραγγελίας",null=True, blank=True, default=datetime.date.today)
    notes = models.CharField(max_length=100, null=True, blank=True, verbose_name="Σημειώσεις")
    preorder_has_products=models.ManyToManyField(Product,blank=True)

    def get_absolute_url(self):
        return reverse('preorder_edit', kwargs={'pk': self.pk})

我的form.py

class PreorderForm(ModelForm):    

    class Meta:
        model = Preorder
        fields=('preorder_date','notes',)

    def __init__(self, *args, **kwargs):
        super(PreorderForm, self).__init__(*args,**kwargs)
        self.fields['preorder_date'].widget = MyDateInput(attrs={'class':'date'})


class PreorderHasProductsForm(ModelForm):

    class Meta:
        model=Preorder.preorder_has_products.through
        exclude=('client',)

    def __init__(self, *args, **kwargs):
        super(PreorderHasProductsForm, self).__init__(*args, **kwargs)
        #self.fields['preorder_date'].widget = MyDateInput(attrs={'class':'date'})
        self.fields['product'].label = "Ονομα Προϊόντος"


PreorderProductFormSet = inlineformset_factory(Preorder,Preorder.preorder_has_products.through,
                                            form=PreorderHasProductsForm, extra=1)

我的view.py

class PreorderProductCreateView(LoginRequiredMixin, CreateView):
    model = Preorder
    fields=['preorder_date','client',]
    template_name='test/test.html'

    def get_success_url(self, **kwargs):
        return reverse('client_list)


    def form_valid(self, form):
        context = self.get_context_data()
        Preorder_Preorder_Has_ProductsFormset = context['Preorder_Preorder_Has_ProductsFormset']
        if Preorder_Preorder_Has_ProductsFormset.is_valid() and form.is_valid():
            self.object = form.save() # saves Father and Children
            #products = Preorder_Preorder_Has_Products_CreateView.save(commit=False)
            products=Preorder_Preorder_Has_ProductsFormset.save_m2m()
            print(len(products))
            for instance in products:
                 instance.preorder = self.object
                 instance.save() #douleuei, to self.object anaferetai sto preorder
                 #Preorder_Preorder_Has_Products_CreateView.save_m2m()
                 print(instance.id)
                 print(instance.preorder.id)
                 print(instance.product_id)

                 return redirect(self.get_success_url())
        else:
                 return self.render_to_response(self.get_context_data(form=form))

        return super(ProductCreateView, self).form_valid(form)


    def form_invalid(self, form):
        return self.render_to_response(self.get_context_data(form=form))



    def get_context_data(self,**kwargs):
        data = super(PreorderProductCreateView, self).get_context_data(**kwargs)
        self.client=Client.objects.get(pk=self.kwargs['client_pk'])
        data['client']= self.client
        if self.request.POST:
            data['form'] = PreorderForm(self.request.POST)
            data['Preorder_Preorder_Has_ProductsFormset'] = PreorderProductFormSet(self.request.POST)#bound the formset with data

        else:
            data['form'] = PreorderForm(self.request.POST)
            data['Preorder_Preorder_Has_ProductsFormset'] = PreorderProductFormSet()#empty formset

        return data

最后是我的模板

{% extends 'base.html' %}
{% load bootstrap3 %}
{% load static %}
<!-- Latest compiled and minified JavaScript -->

{% block content %}

<div class="col-md-12 text-center">
<h2>Δημιουργία / Επεξεργασία Προπαραγγελίας </h2>
<div>Πελάτης: <strong>{{client}} </strong></div>
</div>

<hr>
<form class="well" method="post" action="">
{% csrf_token %}
{% bootstrap_form form %}

<table class="table book">
  {{ Preorder_Preorder_Has_ProductsFormset.management_form }}

  {% for form in Preorder_Preorder_Has_ProductsFormset.forms %}
      {% if forloop.first %}
          <thead>
          <tr>
              {% for field in form.visible_fields %}
                  <th>{{ field.label|capfirst }}</th>
              {% endfor %}
          </tr>
          </thead>
      {% endif %}
      <tr class="{% cycle row1 row2 %} formset_row">
          {% for field in form.visible_fields %}
              <td>
                  {# Include the hidden fields in the form #}
                  {% if forloop.first %}
                      {% for hidden in form.hidden_fields %}
                          {{ hidden }}
                      {% endfor %}
                  {% endif %}
                  {{ field.errors.as_ul }}
                  {{ field }}
              </td>
          {% endfor %}
      </tr>
  {% endfor %}
</table>

<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src="{% static 'jquery.formset.js' %}"></script>
<script type="text/javascript">
  $('table.book tr.formset_row').formset({
      addText: 'Πρόσθεσε Προϊόν',
      deleteText: 'διαγραφή',
      prefix: 'preorder_has_products_set',
      animateForms: true
  });
</script>

    {% buttons %}
      <button type="submit" class="btn btn-primary">
         Submit
      </button>
    {% endbuttons %}
</form>

<hr>
{{ form.media }}
<link rel="stylesheet" type="text/css" href="{% static 'admin/css/forms.css' %}"/>
<link rel="stylesheet" type="text/css" href="{% static 'admin/css/base.css' %}"/>
<link rel="stylesheet" type="text/css" href="{% static 'admin/css/widgets.css' %}"/>
<script type="text/javascript" src="/admin/jsi18n/"></script>
<script type="text/javascript" src="/static/admin/js/core.js"></script>
<!-- <script type="text/javascript" src="/static/admin/js/admin/RelatedObjectLookups.js"></script> -->
<script type="text/javascript" src="/static/admin/js/vendor/jquery/jquery.min.js"></script>
<script type="text/javascript" src="/static/admin/js/jquery.init.js"></script>
<script type="text/javascript" src="/static/admin/js/actions.min.js"></script>
<script type="text/javascript" src="/static/admin/js/calendar.js"></script>
<script type="text/javascript" src="/static/admin/js/admin/DateTimeShortcuts.js"></script>
{% endblock %}

Why I can not save the instance of preorder_has_products? Does the name of the prefix in the template play any role?

有任何想法吗？

看起来如何