elementui中的穿梭框实现单选以及联动_el-transfer 单选

最近做的项目中用到了elementui中的穿梭框，要求老师和学生对应的关系是一对多，老师只能是单选的，并且如果选择了已设置的老师，需要在下面的学生的穿梭框中，同步显示该老师名下的学生信息，因为穿梭框默认是支持多选的，所以在原有基础上加以改造

效果图

代码

html代码

<!--设置实习生与导师关系-->
        <el-dialog
        title="XXX实习计划导师设置"
        :visible.sync="showModal"
        width="60%">
        <span>
            <div>
                <div class="transfertitle">选择要设置的指导老师</div>
                <el-transfer 
                v-model="value1" 
                :data="teacherdata" 
                :render-content="renderFunc" @left-check-change="checkTeacher($event)"
                @change="teaChange($event)"></el-transfer>
                <div class="transfertitle">选择要设置的学生</div>
                <el-transfer :render-content="renderFunc" v-model="stuvalue" :data="studata"></el-transfer>
            </div>
        </span>
        <span slot="footer" class="dialog-footer">
            <el-button @click="showModal = false">取 消</el-button>
            <el-button type="primary" @click="showModal = false">确 定</el-button>
        </span>
        </el-dialog>

数据格式

teacherdata: [//老师数据
            {
                key: 0,
                label: `老师 A`,
                setting:'已设置',
                stuset:[1,2],
                disabled:false
            },
            {
                key: 1,
                setting:'',
                label: `老师 B`,
                stuset:[],
                disabled:false
            },
            {
                key: 2,
                setting:'',
                label: `老师 C`,
                stuset:[],
                disabled:false
            },
            {
                key: 3,
                setting:'',
                label: `老师 D`,
                stuset:[],
                disabled:false
            }
        ],
        studata: [//学生数据
            {
                key: 1,
                label: `学生 A`,
                setting:'已设置',
                disabled:false
            },
            {
                key: 2,
                label: `学生 B`,
                setting:'已设置'
            }
        ],
        stuvalue:[],//选中的学生

 js方法

        checkTeacher(e){
            //当某个老师被选中时其他老师就无法被点击
            let len = this.teacherdata.length;
            if(e.length==0){
                for(let i = 0;i<len;i++){
                    this.teacherdata[i].disabled = false;
                }
            }else{
                for(let i = 0;i<len;i++){
                    this.teacherdata[i].disabled = true;
                }
                this.teacherdata[e[0]].disabled = false
            }
                
        },
        teaChange(e) {
            let len = this.teacherdata.length;
            if(e.length!=0){
                for(let i = 0;i<len;i++){
                    if(e[0]==i){
                        this.teacherdata[i].disabled = false
                        console.log(this.teacherdata[i].stuset)
                        this.stuvalue = this.teacherdata[i].stuset.length==0?[]:this.teacherdata[i].stuset
                    }else{
                        this.teacherdata[i].disabled = true
                    }
                     
                }
            }else{
               for(let i = 0;i<len;i++){
                    this.teacherdata[i].disabled = false
                    this.stuvalue = []
                } 
            }
        },