Django Rest框架如何基于ID保存带有相关字段的模型
我对DRF有点陌生。我的记录模型如下所示:Django Rest框架如何基于ID保存带有相关字段的模型,django,django-models,django-rest-framework,Django,Django Models,Django Rest Framework,我对DRF有点陌生。我的记录模型如下所示: class Records(models.Model): owner = models.ForeignKey(User, null=True) activity = models.ForeignKey(Activity, null=True) time_start = models.DateTimeField(null=True) time_end = models.DateTimeField(null=True)
class Records(models.Model):
owner = models.ForeignKey(User, null=True)
activity = models.ForeignKey(Activity, null=True)
time_start = models.DateTimeField(null=True)
time_end = models.DateTimeField(null=True)
...
RecordSerializer是这样的:
class RecordSerializer(serializers.ModelSerializer):
now = datetime.today()
owner = serializers.Field(source='owner.username')
time_start = serializers.DateTimeField(source='now')
class Meta:
model = Records
fields = ("owner", "activity", "time_start")
这是一种观点:
class StartApiView(generics.CreateAPIView):
model = Records
serializer_class = RecordSerializer
def pre_save(self, obj):
obj.owner = self.request.user
POST请求是从主干发送的,它包括一个带有活动id的字段,例如“{activity:12}”。如果我想让视图保存记录并将活动设置为id为12的活动,我该怎么办?Django REST框架正好适用于此用例
class RecordSerializer(serializers.ModelSerializer):
activity = serializers.PrimaryKeyRelatedField()
owner = serializers.CharField(read_only=True, source='owner.username')
time_start = serializers.DateTimeField(source='now')
class Meta:
model = Records
fields = ("owner", "activity", "time_start")
这将产生与您正在寻找的内容类似的输出,并且当您想要更新它时,它将接受活动的
id
。接受的答案对于DRF v2.x是正确的,但是,由于它将引发此断言错误
:
AssertionError:Relational字段必须提供一个queryset
参数,或设置read_only=True
对于较新版本,只需向其添加queryset
参数:
class RecordSerializer(serializers.ModelSerializer):
activity = serializers.PrimaryKeyRelatedField(queryset=Activity.objects.all())
// [...]
谢谢你的回答,非常有用的参考。我会接受它,只要我得到工作的看法。现在我正试图解决另一个错误,我把它贴在这个问题上,也许你也可以帮我一把:。