在序列化器中更新:django rest框架

Question

我有疑问，如何在序列化器中使用update() ?

serializers.py

def update(self, instance, validated_data):
instance.name = validated_data.get('name', instance.name)
instance.description = validated_data.get('description', instance.description)
instance.is_free = validated_data.get('is_free', instance.is_free)
instance.keyarea = validated_data.get('keyarea', instance.keyarea)
instance.subject = validated_data.get('subject', instance.subject)
beneficiary_data = validated_data.get('beneficiary', instance.beneficiary)
instance.beneficiary.set(*[beneficiary_data])
section_data = validated_data.get('section', instance.section)
instance.section.set(*[section_data])
instance.image = validated_data.get('image', instance.image)
instance.instructor = validated_data.get('instructor', instance.instructor)
instance.relevance = validated_data.get('relevance', instance.relevance)
instance.difficulty = validated_data.get('difficulty', instance.difficulty)
instance.contributor = validated_data.get('contributor', instance.contributor)
instance.general_status = validated_data.get('general_status', instance.general_status)
instance.review_status = validated_data.get('review_status', instance.review_status)
instance.save()
return instance

我在这里用了很多行来更新课程模型，有没有其他方法可以简化这个?

Answer 1

您也可以弹出m2m数据，然后调用super().update()，然后像这样处理m2m:

def update(self, instance, validated_data):
beneficiary_data = validated_data.pop('beneficiary', instance.beneficiary)
section_data = validated_data.pop('section', instance.section)
instance = super().update(instance, validated_data)
instance.beneficiary.set(*[beneficiary_data])
instance.section.set(*[section_data])
return instance

Answer 2

一般来说是可以的，但是你可以这样做:

for k, v in validated_data.items():
setattr(instance, k, v)