python - DRF oneToOneField 创建序列化器

Question

尝试使用 drf/create serizlizer 创建一些嵌套模型。

我想要序列化的是“TradePost”模型，其中包含帖子和 ProductItem。

我已经通过使用这个有了“ProductItemSerializer”和“PostSerializer”..我如何序列化它们？与创造？不是通过告诉现有记录 pk 值。

模型.py

class ProductItem(models.Model):
    baseProduct = models.ForeignKey(Product, related_name='baseProduct')

    seller = models.ForeignKey(User)

    price = models.DecimalField(max_digits=6, decimal_places=2)

    isOrderClosed = models.BooleanField()
    isTradeCompleted = models.BooleanField()


    def __str__(self):
        return '[seller = '+self.seller.username+']' + '[product = '+(str)(self.baseProduct)+']' + '[id = '+(str)(self.id)+']'




class TradePost(models.Model):

    basePost = models.OneToOneField(Post)

    baseProductItem = models.OneToOneField(ProductItem)

    def __str__(self):
        return '[post = ' + (str)(self.basePost) + ']' + '[product = ' + (str)(self.baseProductItem) + ']' + '[id = ' + (str)(self.id) + ']'

在serialziers.py中

class ProductItemCreateSerializer(serializers.ModelSerializer):
    class Meta:
        model = ProductItem
        fields = ('baseProduct', 'price')



#???
class TradePostCreateSerializer(serializers.ModelSerializer):

    class Meta:
        model = TradePost
        fields = ('basePost', 'baseProductItem',)

    def create(self, validated_data):
        post =

Answer 1

类似于writable nested serializer ，你可以尝试这样的事情:

class TradePostCreateSerializer(serializers.ModelSerializer):
    basePost = PostCreateSerializer()
    baseProductItem = ProductItemCreateSerializer()

    class Meta:
        model = TradePost
        fields = ('basePost', 'baseProductItem',)

    def create(self, validated_data):
        # pop out the dict to create post and item, depend on whether you want to create post or not
        post = validated_data.get('basePost')
        product = validated_data.get('baseProductItem')
        # create post first
        trade_post = None
        post_obj = Post.objects.create(**post)
        if post_obj:
            # create product item
            prod_item = ProductItem.objects.create(basePost=post_obj, **product)
            trade_post = TradePost.objects.create(baseProduct=prod_item, **validated_data)
        return trade_post

对于Python，请遵循命名约定，使用lower_case_with_underscores，如base_product、base_post，这样会更容易阅读