select :value不能绑定到对象属性吗？

Question

select :value不能绑定到对象属性吗？:value="activeStationGroup.irrigation_scheduler.start_time，选择后，select不变。
这样可以：

                    <q-select  ref="start_time" dense emit-value map-options
                        :options="timeOptions"
                        :value="start_time"
                        @input="val => { setSelect('start_time', val) }"
                        :rules="[
                            val => getValue(val) <= getValue(activeStationGroup.irrigation_scheduler.stop_time) - 2 || $t('Start time can not later than stop time before one hour'),
                            val => validatecCaculate(val) || $t('Irrigate time can not later than stop time')
                        ]">
                        <template v-slot:before>
                            <div class="edit-label"> {{$t('Start time')}}(*):</div>
                        </template>
                    </q-select>

这样就不可以：

                        <q-select  ref="start_time" dense emit-value map-options
                            :options="timeOptions"
                            :value="activeStationGroup.irrigation_scheduler.start_time"
                            @input="val => { setSelect('start_time', val) }"
                            :rules="[
                                val => getValue(val) <= getValue(activeStationGroup.irrigation_scheduler.stop_time) - 2 || $t('Start time can not later than stop time before one hour'),
                                val => validatecCaculate(val) || $t('Irrigate time can not later than stop time')
                            ]">
                            <template v-slot:before>
                                <div class="edit-label"> {{$t('Start time')}}(*):</div>
                            </template>
                        </q-select>

Answer 1

原因找到了，双向绑定，不支持新增对象。也有可能是方法不对

Answer 2

可以看下vue的$set功能，就是数据改变，视图没改变的；

https://cn.vuejs.org/v2/api/#...