Django：如何在手动表单字段中显示模型的外键对象作为选择

Posted 2023-02-24

【中文标题】Django：如何在手动表单字段中显示模型的外键对象作为选择

【英文标题】：Django: How to display foreign key objects of a model in manual form field as choices

【发布时间】：2020-05-15 01:32:03

【问题描述】：

所以我有 2 个模型，称为 Billing 和 Organization，如下所示。管理站点中的计费按预期工作，即组织字段显示列出的所有组织，并让我可以选择一个。如果我为计费实现一个模型表单，它不会显示我可以选择的所有组织。如何实施？我在下面分享了forms.py、views.py的代码。

models.py

class Organization(models.Model):
    name = models.CharField(max_length=255, unique=True)
    user = models.ForeignKey(User, on_delete=models.CASCADE)

    def __str__(self):
        return str(self.name)



class Billing(models.Model):
    invoice_name = models.CharField(max_length=50)
    organization = models.ForeignKey(Organization, on_delete=models.CASCADE)
    timestamp = models.DateTimeField(auto_now_add=True)
    product = models.ManyToManyField(Product)

    def __str__(self):
        return str(self.invoice_name)

views.py

class BillingCreateView(AdminStaffRequiredMixin, SuccessMessageMixin, CreateView):
    model = Billing
    form_class = forms.BillingCreateForm
    template_name = 'dashboard/billing_new.html'
    success_message = 'Invoice has been created successfully!'

    def form_valid(self, form):
        form.instance.user = self.request.user
        return super().form_valid(form)

dashboard/billing_new.html

<!-- start form -->
                <div class="col-lg-12">
                        <form method="post" action="% url 'product_create' %" class="mailform off2" enctype="multipart/form-data">
                            <div class="row">
                                % csrf_token %
                                <div class="col-md-6 offset-md-3">
                                     form.invoice_name 
                                </div>
                                <div class="col-md-6 offset-md-3">
                                     form.organization 
                                </div>
                                <div class="col-md-6 offset-md-3">
                                     form.product 
                                </div>
                                % if redirect_field_value %
                                <input type="hidden" name=" redirect_field_name " value=" redirect_field_value " />
                                % endif %
                                <div class="mfControls col-md-12 offset-md-3 text-left mt-2">
                                    <button type="submit" class="btn white">% trans "CREATE" %</button>
                                </div>
                            </div>
                        </form>
                </div>
                <!-- end form -->

forms.py

class BillingCreateForm(forms.ModelForm):


    class Meta:
        model = models.Billing
        fields = ['invoice_name', 'organization', 'product']
        widgets = 
            'invoice_name': forms.TextInput(attrs='type': 'text', 'name': 'name', 'placeholder': 'Invoice Name:'),
            'organization': forms.TextInput(attrs='type': 'text', 'name': 'name', 'placeholder': 'Company:'),
            'items': forms.TextInput(attrs='type': 'text', 'name': 'name', 'placeholder': 'Items:'),
        

【问题讨论】：

你可以用 ajax 和 rest api 实现

@AsaduzzamanSohel 这是一个简单的问题。我已经在下面发布了修复程序。谢谢！

【参考方案1】：

我通过在 forms.py 中使用forms.select 小部件解决了这个问题，如下所示：-

class BillingCreateForm(forms.ModelForm):

class Meta:
    model = models.Billing
    fields = ['invoice_name', 'organization', 'product']
    widgets = 
        'invoice_name': forms.TextInput(attrs='type': 'text', 'name': 'name', 'placeholder': 'Invoice Name:'),
        'organization': forms.Select(attrs='type': 'text', 'name': 'name', 'placeholder': 'Company:'),
        'items': forms.TextInput(attrs='type': 'text', 'name': 'name', 'placeholder': 'Items:'),