我有以下模特:
class Card(models.Model):
thing = models.CharField(max_length=50, blank=True, null = True, )
class Responsibility(models.Model):
name = models.CharField(max_length=50, blank=True, null=True, )
card = models.ForeignKey(Card, related_name='responsibilities', blank=True, null=True, on_delete=models.CASCADE)
class Collaborator(models.Model):
name = models.CharField(max_length=50, blank=True, null=True, )
card = models.ForeignKey(Card, related_name='collaborators', blank=True, null=True, on_delete=models.CASCADE)
我的序列化器:
class CollaboratorSerializer(serializers.ModelSerializer):
class Meta:
model = Collaborator
fields = '__all__'
class ResponsibilitySerializer(serializers.ModelSerializer):
class Meta:
model = Responsibility
fields = '__all__'
class CardSerializer(serializers.ModelSerializer):
responsibilities = ResponsibilitySerializer(many=True,)
collaborators = CollaboratorSerializer(many=True,)
class Meta:
model = Card
fields = '__all__'
def create(self, validated_data):
responsibilities_data = validated_data.pop('responsibilities')
collaborators_data = validated_data.pop('collaborators')
card = Card.objects.create(**validated_data)
for responsibility_data in responsibilities_data:
Responsibility.objects.create(card=card, **responsibility_data)
for collaborator_data in collaborators_data:
Collaborator.objects.create(card=card, **collaborator_data)
return card
创建并获得成功,我不知道如何为Card实现update()方法。示例request.data如下所示:
{u'collaborators': [{u'id': 8, u'card': 12, u'name': u''}, {u'name': u''}, {u'name': u''}], u'responsibilities': [{u'name': u'Name'}, {u'name': u'Age'}, {u'name': u'Address'}], u'id': 12, u'thing': u'Reader'}
在我的更新方法中,我想首先删除该特定卡的所有职责和协作者,然后从收到的数据中创建新的。
到目前为止我所拥有的:
def update(self, instance, validated_data):
instance.responsibilities.all().delete()
instance.collaborators.all().delete()
.. NOT SURE ABOUT THIS PART ..
答案 0 :(得分:1)
您可以覆盖ModelSerializer的update
方法
class CardSerializer(serializers.ModelSerializer):
...
def update(self, instance, validated_data):
# do stuff here
instance.collaborators.all().delete()
instance.responsibilities.all().delete()
res = validated_data.get('responsibilities', [])
aList = [Responsibility(**vals) for vals in res]
Responsibility.objects.bulk_create(aList)
# same goes for collaborators
答案 1 :(得分:0)
此链接https://github.com/encode/django-rest-framework/blob/master/docs/topics/writable-nested-serializers.md可以为您提供帮助。此包非常适合更新并在序列化程序中创建相关字段而无需覆盖方法。我希望它对你有用