在序列化程序中更新：django rest framework

Question

我有疑问，如何在序列化程序中使用 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

一般情况下没问题，但您可以这样做：

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

Answer 2

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

在序列化程序中更新：django rest framework

update in serializer: django rest framework

django

django-models

django-views

django-rest-framework