vue想在组件加载的时候通过mounted获取computed中...mapState值的时候为underfined，如何解决？

Question

    computed:{
        ...mapState({
            user: state=>state.user,
            token:state=>state.token,
            teachers:state=>state.teachers
        })
    },
    mounted(){
        console.log('this.teachers',this.teachers)
        if(this.teachers.length == 0){
            this.getTeachers();
        }
    },

Answer 1

已经解决了，是我引用 错了，应该是：

 teachers:state=>state.adminTeacher.teachers

Answer 2

我的也是undefined