DjangoRestFramework - 如何将不同序列化程序的结果合并为一个

Question

我有4-5个模型如下：-

class Product(models.Model):
    title = models.CharField(max_length=255)
    short_description = models.TextField(blank=True,null=True)
    video_link = models.URLField(blank=True,null=True)
    price = models.IntegerField(db_index=True,blank=True,null=True)
    user = models.ForeignKey(User)

    @staticmethod
    def get_product_details(product,category=None,image=None,comment=None,rating=None):
        product_detail =  {
                'id' : product.id,
                'title' : product.title,
                'short_description' : product.short_description,
                'video_link' : product.video_link,
                'price' : product.price,
                'user' : product.user.first_name + ' ' + product.user.last_name,
            }

        if category:
            product_detail.update({'categories': ProductCategory.get_product_categories(product)})
        if comment:
            product_detail.update({'comments' : ProductComments.get_product_comments(product)})
        if image:
            product_detail.update({'images': ProductImages.get_product_images(product)})
        if rating:
            product_detail.update({'rating': ProductRating.return_data(product)})

        return product_detail


class ProductCategory(models.Model):
    subcategory = models.CharField(max_length=255)
    product = models.ForeignKey(Product)
    date = models.DateTimeField(auto_now_add=True)

    @staticmethod
    def get_product_categories(product):
        return ProductCategory.objects.filter(product=product).values_list('subcategory',flat=True)

同样，我有多个用 Product 作为 FK 引用的模型（例如 ProductImages、ProductComments 等），我需要从中获取数据然后将其集中显示在 Product 模型下使用 get_product_details 获取特定产品的数据。

因此，如果我浏览到 localhost:8080/product/<product_id>，它将调用 get_product_details，后者又会调用模型中的其他方法来收集 <product_id> 的信息引用。

是否可以在 Django-Rest-Framework 中创建一个序列化程序，它将从引用特定产品对象的其他序列化程序中获取数据？？

以下是我的序列化程序。

class ProductSerializer(serializers.ModelSerializer):
    class Meta:
        model = Product


class ProductCategorySerializer(serializers.ModelSerializer):
    class Meta:
        model = ProductCategory

我期待的是这样的：-

class ProductSerializer(serializers.ModelSerializer):
        class Meta:
            model = Product
            include_data_models = (ProductCategory,ProductImages,)

我的预期输出应为以下格式：-

[
    {
        "price": 1234,
        "categories": [
            "Tech"
        ],
        "id": 1,
        "title": "1",
        "user": "user full name from User's model",
        "video_link": "",
        "short_description": ""
    }
]

Answer 1

假设您使用的是 Django REST Framework v3.0+，我建议您查看 models.ForeignKey 字段中的 Django REST Framework Documentation on Serializer Relations. In addition, you will want to utilize ForeignKey.related_name。

型号

class Product(models.Model):
    title = models.CharField(max_length=255)
    short_description = models.TextField(blank=True,null=True)
    video_link = models.URLField(blank=True,null=True)
    price = models.IntegerField(db_index=True,blank=True,null=True)
    user = models.ForeignKey(
        to=User, 
        related_name="products",
    )

    ...


class ProductCategory(models.Model):
    subcategory = models.CharField(max_length=255)
    product = models.ForeignKey(
        to=Product, 
        related_name="categories",
    )
    date = models.DateTimeField(auto_now_add=True)

    ...

    def __unicode__(self):
        return self.subcategory  # Tech, Books, etc.

序列化器

class ProductCategorySerializer(serializers.ModelSerializer):
    class Meta:
        model = ProductCategory


class ProductSerializer(serializers.ModelSerializer):
    # The related_name="categories" on the ProductCategory.product
    #    will allow us to retrieve categories, and convert it to
    #    the __unicode__ equivalent.
    # http://www.django-rest-framework.org/api-guide/relations/#stringrelatedfield
    categories = serializers.StringRelatedField(many=True)

    class Meta:
        model = Product

DjangoRestFramework - 如何将不同序列化程序的结果合并为一个

DjangoRestFramework - How to get result from different serializers into one

python

django

django-rest-framework

django-serializer

型号

序列化器