如何通过外键访问特定订单的OrderItems

如何解决如何通过外键访问特定订单的OrderItems

我正在建立一家网上商店来出售音乐。我的ProfileView出现问题，我想在此向客户显示他已购买的文件的已完成订单。

这是我的模特：

class Product(models.Model):
    title = models.CharField(max_length=50)
    slug = models.SlugField()
    description = models.TextField()
    image = models.ImageField(upload_to='product_images')
    file = models.FileField(upload_to='product_files')
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
    active = models.BooleanField(default=False)
    soundkit = models.BooleanField(default=False)
    licence_variation = models.ManyToManyField(LicenceVariation)

    def get_absolute_url(self):
        return reverse("cart:product-detail",kwargs={'slug': self.slug})

    def get_delete_url(self):
        return reverse('staff:product-delete',kwargs={'pk': self.pk})

    def is_soundkit(self):
        return self.soundkit

    def __str__(self):
        return self.title

    def get_update_url(self):
        return reverse("staff:product-update",kwargs={'pk': self.pk})


class OrderItem(models.Model):
    order = models.ForeignKey("Order",related_name='items',on_delete=models.CASCADE)
    product = models.ForeignKey(Product,on_delete=models.CASCADE)
    licence_variation = models.ForeignKey(LicenceVariation,on_delete=models.CASCADE)

    def __str__(self):
        return self.product.title

    def get_raw_total_item_price(self):
        return self.licence_variation.price

    def get_total_item_price(self):
        price = self.get_raw_total_item_price()
        return "{:.2f}".format(price / 100)

class Order(models.Model):
    user = models.ForeignKey(User,blank=True,null=True,on_delete=models.CASCADE)
    start_date = models.DateTimeField(auto_now_add=True)
    ordered_date = models.DateTimeField(blank=True,null=True)
    ordered = models.BooleanField(default=False)
    billing_address = models.ForeignKey(Address,related_name='billing_address',on_delete=models.SET_NULL)
    shipping_address = models.ForeignKey(Address,related_name='shipping_address',on_delete=models.SET_NULL)

    def __str__(self):
        return self.reference_number

    @property
    def reference_number(self):
        return f"Order-{self.pk}"

    def get_raw_subtotal(self):
        total = 0
        for order_item in self.items.all():
            total += order_item.get_raw_total_item_price()
        return total

    def get_subtotal(self):
        subtotal = self.get_raw_subtotal()
        return "{:.2f}".format(subtotal / 100)

    def get_raw_total(self):
        subtotal = self.get_raw_subtotal()
        return subtotal

    def get_total(self):
        total = self.get_raw_total()
        return "{:.2f}".format(total / 100)

    def get_order_item_set(self):
        return self.items.all()

这是我的个人资料视图

class ProfileView(LoginRequiredMixin,generic.TemplateView):
    template_name = 'profile.html'

    def get_context_data(self,**kwargs):
        context = super(ProfileView,self).get_context_data(**kwargs)
        context.update({
            "orders": Order.objects.filter(user=self.request.user,ordered=True),'order_items': OrderItem.objects.all
        })
        return context

显然，它正在显示模板中的所有OrderItems，因为我使用objects.all方法，但是我想对其进行过滤，因此它只显示属于正确订单的OrderItems。

有人可以帮助我以正确的方式过滤OrderItems吗？

非常感谢

解决方法

在模板中，您可以使用FK关系按订单对订单商品进行分组：

{% for order in orders %}
  <h3>{{ order }}</h3>
  {% for item in order.items.all %}
    <p>{{ item }}</p>
  {% endfor %}
{% endfor %}

但是，如果您只想按顺序列出所有商品的有序列表，则可以这样做

OrderItem.objects.all().order_by('order')