el-select绑定值为对象时，报错[Vue warn]: <

问题是因为后台接口返回来的一个label是null，所以选中的时候会报错
1.结构

<div class="clear" v-if="item.remindType==2&&showMoreRemind">
                        <el-form-item style="padding-left:15px;" prop="moreRemind" class="item-form-3 require-label">
                            <el-select v-model="remindForm.remindIntervalList" placeholder="请选择" multiple
                                        @change="getRemindTime" :disabled="operationType === 'view'" >
                                <el-option v-for="option in item.dicts"
                                           :key="option.dictName+index"
                                           :label="option.dictName"
                                           :value="option.label"
                                >
                                </el-option>
                                <el-option value="custom" label="自定义" v-if="isCustom===true"></el-option>
                            </el-select>
                            <span class="tip">周期内提醒：针对跨天日程，在开始时间每日的同一时间进行提醒</span>
                        </el-form-item>
                        <el-form-item prop="IntervalTimes" label="提前" class="item-form-4 mr-80"
                                      v-if="customTimeFlag===true">
                            <div class="customTimeInput">
                                <el-input v-model.number="remindForm.customTimeD" type="IntervalTimes" maxlength="2"
                                          style="padding:0; width: 80px;"></el-input>
                                &nbsp;&nbsp;&nbsp;天&nbsp;&nbsp;&nbsp;
                                <el-input v-model.number="remindForm.customTimeH" type="IntervalTimes" maxlength="2"
                                          style="padding:0; width: 80px;"></el-input>
                                &nbsp;&nbsp;&nbsp;小时&nbsp;&nbsp;&nbsp;
                                <el-input v-model.numder="remindForm.customTimeM" type="IntervalTimes" maxlength="2"
                                          style="padding:0; width: 80px;"></el-input>
                                &nbsp;&nbsp;&nbsp;分钟&nbsp;&nbsp;&nbsp;
                            </div>
                        </el-form-item>
                    </div>
``
![image.png](https://img.haomeiwen.com/i7492009/ba60561752c62aef.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
2.思路是修改的时候，在详情返回的时候把null修改-3或其他的不是null，underfunded就行，然后再保存的时候再把-3修改成null提交给后台，因为之前给后台约定的是null，（记得以后千万别让后台返回什么null，underfunded这样的特殊，如果返回会把前端坑死不可）

searchDetails(obj) {
let params = {id: obj.id};
http.get('/task/taskDetail', params)
.then((res) => {
if (res.status === 0) {
this.attchList = res.data.fileList.length ? [{
name: res.data.fileList[0].fileName,
url: res.data.fileList[0].filePath
}] : [];
this.fileInfo = (res.data.fileList.length && res.data.fileList[0]) || {};

                      //回显自定义input值
                        let timeArr = [];
                        for (let i = 0; i < this.myRemindList.length; i++) {
                            for (let k = 0; k < this.myRemindList[i].dicts.length; k++) {
                                if (this.myRemindList[i].remindType == 2) {
                                    timeArr.push(this.myRemindList[i].dicts[k].label)
                                }
                            }
                        }
                        //过滤出来只有自定义
                        let newTimeArr = [];
                        for (let n = 0; n < res.data.remindIntervalList.length; n++) {
                            if (timeArr.indexOf(res.data.remindIntervalList[n]) == -1&&res.data.remindIntervalList[n]!=null) {
                                newTimeArr.push(res.data.remindIntervalList[n])
                                break;
                            }
                        }
                        
                        //计算自定义input框的值
                        var date = parseInt(newTimeArr[0] / (24 * 60));
                        var hours = parseInt((newTimeArr[0] % (24 * 60)) / 60);
                        var minutes = (newTimeArr[0] % (24 * 60)) % 60;

                        //自定义回显选中（添加一个'custom' 字段识辨是自定义）
                        if (newTimeArr.length > 0&&newTimeArr[0]!=null) {
                            res.data.remindIntervalList.push("custom")
                        }

                        // 回显自定义和周期内
                        let _remindIntervalList=res.data.remindIntervalList;
                        for(let h= 0; h < _remindIntervalList.length; h++){
                            //是自定义
                            if(_remindIntervalList[h] === newTimeArr[0]&&_remindIntervalList[h] != null){
                                _remindIntervalList.splice(h,1);
                            }
                            //是周期内
                            if(_remindIntervalList[h] === null){
                                _remindIntervalList[h]=-3
                            }
                        }

                        this.remindForm = {
                            ...res.data,
                            remindTime: res.data.remindInterval,
                            fileList: res.data.fileList,
                            checked: res.data.isWholeDay === 1,
                            userId: '',
                            customTimeD: date,
                            customTimeH: hours,
                            customTimeM: minutes,
                            groupId: res.data.groupId,
                            remindIntervalList: _remindIntervalList,
                            remindType: Number(res.data.remindType), //回显必须number类型
                            repeatTimes: res.data.repeatTimes,
                            repeatType: res.data.repeatType,
                            remindInfos: res.data.remindInfos,
                        };
                    } else {
                        this.$message.error(res.message);
                    }
                })
                .catch((response) => {
                    console.log(response);
                })
        },

3.在保存的时候在修改回来，后台想要的数据

addRemind() {

            //自定义时间监听的到值this.remindInterval替换数组中custom自定义添加给传给后台的数组中
            if (this.remindForm.remindIntervalList) {
                for (let i = 0; i < this.remindForm.remindIntervalList.length; i++) {
                    if (this.remindForm.remindIntervalList[i] === 'custom') {
                        this.remindForm.remindIntervalList.splice(i, 1, this.remindInterval);
                    }
                }
            }

            //自定义验证
            if (this.allDay === false) {
                if (moment(startTime).valueOf() < Date.now()) {
                    return this.$message.error("所选时间不能早于当前时间，请重新选择")
                }
            }
            //周期内过滤一下
            for(let b=0; b<this.remindForm.remindIntervalList.length;b++){
                if(this.remindForm.remindIntervalList[b]==-3){
                    this.remindForm.remindIntervalList[b]=null;
                    break
                }
            }

      }