我正在将django 1.8与djangorestframework == 3.6.3结合使用。 我从文档中获取了模型示例:
https://www.django-rest-framework.org/api-guide/relations/#stringrelatedfield
这是我的序列化器:
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')
这就是我所说的序列化器:
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')
打印声明给我: {“持续时间”:1,“相册”:1,“订单”:1,“标题”:u“某物”} 为什么没有给我对应专辑的所有字段数据?
答案 0 :(得分:2)
在相应的示例中,它们曾经用于返回 offersWithoutexcerpt: function(category) {
if (!category.offers) return [];
return category.offers
.slice(category.largeBox ? 4 : 3, category.offers.length)
.filter(function(offer) {
var today = new Date().setHours(0, 0, 0, 0);
var dateToBeMatchedString = offer["@_expires"];
if (!dateToBeMatchedString) return true;
var dateToBeMatched = new Date(
parseInt(dateToBeMatchedString.substring(6, 10)),
parseInt(dateToBeMatchedString.substring(3, 5)),
parseInt(dateToBeMatchedString.substring(0, 2))
);
return today <= dateToBeMatched;
});
},
的数据,而您试图返回/打印 Album
的数据。
因此,如果您尝试以下操作,它将按照DRF文档中的说明/所示打印/返回数据。
Track
如果您想显示真实到 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')
的详细信息,请创建一个新的专辑序列化程序 album
并将其链接到{{1 }}
AlbumNewSerializer
注意:您可以使用 TrackSerializer
代替 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')
,但结果可能嵌套在丑陋的位置时尚(未经测试..)
答案 1 :(得分:0)
我认为您需要执行以下操作:
class TrackSerializer(serializers.ModelSerializer):
album = AlbumSerializer(…)
...