如何在Django rest框架中检索外键字段？

下面给出模型和序列化程序类，当我检索跟踪详细信息时，它只会显示跟踪标题，而不显示相关的艺术家。如何在Django rest框架中检索外键字段？

如何在检索跟踪详细信息时显示艺术家名称？

models.py

class Artist (models.Model): 
    name = models.CharField(max_length=100) 

    def __str__(self): 
     return self.name 

class Track (models.Model):  
    artist = models.ForeignKey(Artist, blank=True, null=True, on_delete=models.SET_NULL, verbose_name="Artist") 
    title = models.CharField(max_length=100, verbose_name="Title") 

    def __str__(self): 
     return self.title

serializers.py

class ArtistSerializer(serializers.ModelSerializer): 

    id = serializers.IntegerField(read_only=True) 
    name = serializers.CharField() 

    class Meta: 
     model = Artist 
     fields = ('id', 'name') 

class TrackSerializer(serializers.ModelSerializer): 

    class Meta: 
     model = Track 
     fields = '__all__'

来源

2017-06-01 bayman

我想你需要自定义字段，试试这个串行：

class TrackSerializer(serializers.ModelSerializer): 
    class Meta: 
     model = Track 
     fields = ('title', 'artist','artist_name') 

    artist_name = serializers.SerializerMethodField('get_artists_name') 

    def get_artists_name(self, obj): 
     return obj.artist.name

它产生这样的事情。

[ 
    { 
     "title": "Don't let me down", 
     "artist": 2, 
     "artist_name": "The Beatles" 
    }, 
    { 
     "title": "Summertime", 
     "artist": 1, 
     "artist_name": "Ella Fitzgerald" 
    } 
]

此致敬意。

来源

2017-06-01 09:18:30

试试这个串行，

class ArtistSerializer(serializers.ModelSerializer): 

    class Meta: 
     model = Artist 
     fields = '__all__' 

class TrackSerializer(serializers.ModelSerializer): 
    artist = ArtistSerializer() 

    class Meta: 
     model = Track 
     fields = ('title', 'artist')

中序检索艺术家的细节，这是一个ForeignKey模型，你需要在django-rest-framework中使用嵌套的序列化程序。

通过使用TrackSerializer与嵌套ArtistSerializer，检索到的数据会是这个样子，

{ 
    "title": "Some_Title", 
    "artist": { 
        "id": 2, #or id of the artist. 
        "name": "Artist_name" 
       } 
}

来源

2017-06-01 07:43:51 zaidfazil

正如你可以在官方的Django看到REST框架documentations 你应该定义为嵌套项目串行场

首先创建您的Artist（嵌套项目）串行

class ArtistSerializer(serializers.ModelSerializer): 

    id = serializers.IntegerField(read_only=True) 
    name = serializers.CharField() 

    class Meta: 
     model = Artist 
     fields = ('id', 'name')

然后你可以使用它在相关模型串行

class TrackSerializer(serializers.ModelSerializer): 
    artist = ArtistSerializer() 

    class Meta: 
     model = Track 
     fields = ('title', 'artist')

来源

2017-06-01 07:55:37 itmard

如何在Django rest框架中检索外键字段？

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