vue el-date-picker 日期回显后无法改变问题解决

   <el-form-item label="适用时间" prop="time1">
          <el-date-picker
            v-model="form.time1"
            type="datetimerange"
            style="width: 380px"
            :default-time="['00:00:00', '23:59:59']"
            range-separator="至"
            value-format="yyyy-MM-dd HH:mm:ss"
            :picker-options="expireTimeOPtion"
            @change="beginDateChange"
            start-placeholder="开始日期"
            end-placeholder="结束日期">
          </el-date-picker>
        </el-form-item>

 handleUpdate(row) {
      this.reset();
      const id = row.id || this.ids
      var array=[]
      getfuelRates(id).then(response => {
        this.form = response.data;        
        array.push(response.data.startTime,response.data.endTime)
        this.form.time1=array
        this.open = true;
        this.title = "修改";
      });
    },

  handleUpdate(row) {
      this.reset();
      const id = row.id || this.ids
      var array=[]
      getfuelRates(id).then(response => {
        this.form = response.data;        
        array.push(response.data.startTime,response.data.endTime)
        this.$set(this.form,'time1',array);
        this.form.time1=array
        this.open = true;
        this.title = "修改";
      });
    },

  handleUpdate(row) {
      this.reset();
      const id = row.id || this.ids
      getfuelRates(id).then(response => {
        this.form = response.data;
        this.$set(this.form,'time1',[response.data.startTime,response.data.endTime]);
        this.form.time1=array
        this.open = true;
        this.title = "修改燃油附加费";
      });
    },

this.$set(this.form,'time1',XXX);