drf让序列化器支持更新创建、更新外键示例

class SceneTaskSerializer(serializers.ModelSerializer):
    scene = SceneSerializer()

    class Meta:
        model = SceneTask
        fields = (
            'id', 'name', 'serivce_privider', "account", "biz_list", "ip_list", "script_type", "input_display_list",
            "script_param", "output_display_map", "script_content", "script_timeout", "status", "rule_info", "scene",
            'creator', 'create_at', 'block_detail', 'refuse_detail')
        required_field = ('serivce_privider')

    def create(self, validated_data):
        scene = validated_data.pop('scene')
        scene = Scene.objects.get(id=self.initial_data["scene"]["id"])
        return SceneTask.objects.create(scene=scene, **validated_data)

    def update(self, instance, validated_data):
        if validated_data.get("scene"):
            scene = validated_data.pop('scene')
            scene = Scene.objects.get(id=self.initial_data["scene"]["id"])
            scene_task = super(SceneTaskSerializer, self, ).update(instance, validated_data)
            scene_task.scene = scene
            scene_task.save()
            return scene_task
        return super(SceneTaskSerializer, self, ).update(instance, validated_data)

    def is_valid(self, raise_exception=False):
        if self.initial_data.get("scene"):
            instance = Scene.objects.get(id=self.initial_data["scene"])
            self.initial_data["scene"] = SceneSerializer(instance=instance).data
        return super(SceneTaskSerializer, self).is_valid(raise_exception)

重写了is_valid、create、update方法，其中scene是scene_task的外键