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创建具有两个“同级”模型的嵌套序列化程序

django-rest-framework serialization django

1

JeremyE · 技术社区 · 4 年前

{
    name: John Doe,
    best_buy_price: 420,
    best_sell_price: 69,
    player_profile: {
        tsn_link: https://a_link.com
    }
    playerlistingadvanced: { # This is where I'm having the issue
        sales_minute: 7,
    }
}

我有三种型号。 playerProfile 成为“主要”模式和 playerListing playerListingAdvanced 连接到 玩家档案 通过一对一的关系。 playerPfofile 将有自己的端点,但我还想创建一个端点,主要是清单和高级清单数据(如上所示)。

下面是model.py文件的精简版本:

class PlayerProfile(models.Model):
    card_id = models.CharField(max_length=120, unique=True, primary_key=True)
    name = models.CharField(max_length=420, null=True)
    tsn_link = models.CharField(max_length=420, null=True)
   
 
class PlayerListing(models.Model):
    player_profile = models.OneToOneField(
        PlayerProfile,
        on_delete=models.CASCADE,
        null=True)
    name = models.CharField(max_length=420, null=True)
    best_sell_price = models.IntegerField(null=True)
    best_buy_price = models.IntegerField(null=True)


class PlayerListingAdvanced(models.Model):
    player_profile = models.OneToOneField(
        PlayerProfile,
        on_delete=models.CASCADE,
        null=True)
    sales_minute = models.DecimalField(max_digits=1000, decimal_places=2, null=True)

这是我尝试过的serializer.py,但还没有开始工作。

class PlayerListingAdvancedForNestingSerializer(serializers.ModelSerializer):
    class Meta:
        model = PlayerListingAdvanced
        fields = (
            'sales_minute',
            'last_week_average_buy',
            'last_week_average_sell',
        )

class PlayerListingSerializer(serializers.ModelSerializer):
    player_profile = PlayerProfileForListingSerializer() # works
    playerlistingadvanced = PlayerListingAdvancedForNestingSerializer() #doesn't work
    
    class Meta:
        model = PlayerListing
        fields = (
            'name',
            'best_sell_price',
            'best_buy_price',
            'playerlistingadvanced',
            'player_profile'
        )

1 回复 | 直到 4 年前

1

kamilyrb 4 年前

你可以用 SerializerMethodField . 你的假设是正确的。试试这个:

class PlayerListingSerializer(serializers.ModelSerializer):
    player_profile = PlayerProfileForListingSerializer()
    playerlistingadvanced = serializers.SerializerMethodField() 

    class Meta:
        model = PlayerListing
        fields = (
            'name',
            'best_sell_price',
            'best_buy_price',
            'playerlistingadvanced',
            'player_profile'
        )

    def get_playerlistingadvanced(self, obj: PlayerListing):
        player_profile = obj.player_profile
        if hasattr(player_profile, 'playerlistingadvanced'):
            serializer = PlayerListingAdvancedForNestingSerializer(instance=player_profile.playerlistingadvanced)
            return serializer.data
        return None