django modelformset更新多个示例不工作

gojuced7 于 2023-02-10 发布在 Go

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我试图使用modelformset_factory更新模型的多个示例，以渲染出我的模板中的上述示例，每当我填写表格并提交，它不会发布到数据库。
views.py:

def approve(request,pk):
    user = User.objects.get(id=pk)
    requests = PendingRequest.objects.filter(member=user)
    RequestFormset = modelformset_factory(PendingRequest, form=Approve ,extra=0)
    if request.method == "POST":
        formset = RequestFormset(request.POST, queryset=requests)
        if formset.is_valid():
            for form in formset:
                form.save()
    else:
        formset = RequestFormset(queryset=requests)
    return render(request, "books/approve.html",{"formset":formset, "users":requests})

forms.py:

class Approve(forms.ModelForm):
    class Meta:
        model = PendingRequest
        exclude = ["member", "book_request", "not_approved"]

models.py:

class PendingRequest(models.Model):
    book_request = models.ForeignKey(BorrowBook, on_delete=models.CASCADE, null=True)
    member = models.ForeignKey(User, on_delete=models.CASCADE, default="", null=True)
    book = models.ForeignKey(Books, on_delete=models.CASCADE, default="", null=True)
    approved = models.BooleanField(default=False)
    not_approved = models.BooleanField(default=False)
    approval_date = models.DateTimeField(auto_now=True, null=True)

模板

<body>
  <form method="post" action="{% url 'approve' pk=users.0.member.id %}">
    {% csrf_token %}
    {% for form in formset.management_form %}
      {{form}}
    {% endfor %}
    <table>
      <thead>
        <tr>
          <th>Book Title</th>
          <th>Approved</th>
          <th>Not Approved</th>
        </tr>
      </thead>
      <tbody>
        {% for form in formset %}
          <tr>
            <td>{{ form.book }}</td>
            <td>{{ form.approved }}</td>
          </tr>
        {% endfor %}
      </tbody>
    </table>
    <button type="submit">Update</button>
  </form>  
</body>

有什么办法可以修好它吗。

- 我还希望能够在用户未单击模板中的approved复选框时将not_approved字段设置为true。**如有任何关于如何实现此操作的想法，我们将不胜感激

django

来源：https://stackoverflow.com/questions/75348726/modelformset-update-multiple-instance-not-working

1条答案

按热度按时间

nuypyhwy1#

您应该使用commit=False临时保存示例，还应该使用save_m2m()并将not_approved字段设置为True。如果用户没有单击approved复选框，您可以检查表单的cleaned_data中的approved值。
尝试以下视图：

from django.shortcuts import get_object_or_404

def approve(request,pk):
    user = get_object_or_404(User, id=pk)
    requests = PendingRequest.objects.filter(member=user)
    RequestFormset = modelformset_factory(PendingRequest, form=Approve ,extra=0)
    if request.method == "POST":
        formset = RequestFormset(request.POST, queryset=requests)
        if formset.is_valid():
            for form in formset:
                obj = form.save(commit=False)
                if not form.cleaned_data.get('approved'):
                    obj.not_approved = True
                obj.save()
            formset.save_m2m()
    else:
        formset = RequestFormset(queryset=requests)
    return render(request, "books/approve.html",{"formset":formset, "users":requests})

**注意：**最好使用get_object_or_404()而不是get()，因为它在给定的模型管理器上调用get()，但是它引发Http404而不是模型的DoesNotExist异常。

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django modelformset更新多个示例不工作

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