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django restful api-如何序列化外键

django-rest-framework django

0

max · 技术社区 · 7 年前

我从文档中选取了模型示例:

https://www.django-rest-framework.org/api-guide/relations/#stringrelatedfield

以下是我的序列化程序:

from rest_framework import serializers
from .models import *

class AlbumSerializer(serializers.ModelSerializer):
    tracks = serializers.StringRelatedField(many=True)

    class Meta:
        model = Album
        fields = ('album_name', 'artist', 'tracks')


class TrackSerializer(serializers.ModelSerializer):
    class Meta:
        model = Track
        fields = ('order', 'title', 'duration', 'album')

def index(request):
    if Track.objects.all().count() == 0:
        album = Album.objects.create(album_name='something', artist='John')
        Track.objects.create(album=album, order=1, title='something', duration=1)

    print TrackSerializer(instance=Track.objects.all()[0]).data
    return render(request, 'index.html')

打印声明给了我:

2 回复 | 直到 7 年前

1

2

JPG 7 年前

在相应的示例中,它们用于返回 Album 的数据,而您正试图返回/打印 Track 中国的数据。

因此,如果您尝试以下操作,它将按照DRF文档中的描述/显示打印/返回数据

def index(request):
    if Track.objects.all().count() == 0:
        album = Album.objects.create(album_name='something', artist='John')

        print(AlbumSerializer(album).data)  # this will print the data as explianed in the doc

        Track.objects.create(album=album, order=1, title='something', duration=1)

    return render(request, 'index.html')

如果您想显示与之相关的详细信息 album AlbumNewSerializer 并将其链接到 TrackSerializer 像

class AlbumNewSerializer(serializers.ModelSerializer):
    class Meta:
        model = Album
        fields = ('album_name', 'artist')


class TrackSerializer(serializers.ModelSerializer):
    album = AlbumNewSerializer()

    class Meta:
        model = Track
        fields = ('order', 'title', 'duration', 'album')

笔记 AlbumSerializer 而不是 蛋白序列化器 ,但结果可能是丑陋的嵌套方式(未测试…)

2

0

Red Cricket 7 年前

class TrackSerializer(serializers.ModelSerializer):
    album = AlbumSerializer(â¦)

    ...