Django 外键自动填充表单

我有四个模型的商店，客户，产品，订单。 我正在展示模型之间的关系

商店 顾客 产品 秩序 当客户登录时，商店将在屏幕上打印，并在商店上显示一个按钮，以在表单卡中显示商店的产品

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我如何创建订单，以便订单中的客户是实例，订单中的店铺是选择用来显示产品的店铺，并且产品的每张卡片都有一个字段来填写剩余细节并提交

如果我是您，我将使用以下两个选项之一将其添加到表单中 选择1

选择2

# If the form is already created you can use this pattern
context['form'].fields['shop'].initial = shop
context['form'].fields['customer'].initial = self.request.user

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你做得怎么样？我很困惑，你可以向我推荐一个主意。如果我在产品卡上点击“添加”按钮，并在提交后，添加产品的列表将打印剩余信息字段，如数量等，以填充它们

user = models.OneToOneField(User, null=True, on_delete=models.CASCADE

    shop = models.ForeignKey(Shop, models.CASCADE, null=True, blank=True)

shop = models.ForeignKey(Shop, models.CASCADE, null=True)
customer = models.ForeignKey(Customer, models.CASCADE, null=True)
product = models.ForeignKey(Product, models.CASCADE, null=True)

def get_context_data(self, **kwargs):
    context = super().get_context_data(**kwargs)
    # Get the shop_id from the URL
    shop = get_object_or_404(Shop, pk=shop_id)
    # Create a form and add it the context
    form = OrderForm(
        # This is where the magic happens
        initial={"shop": shop], "customer": self.request.user})
    # Use this if you want to hide it as well
    form.fields['item'].widget = forms.HiddenInput()

# If the form is already created you can use this pattern
context['form'].fields['shop'].initial = shop
context['form'].fields['customer'].initial = self.request.user