修改商品报错，bug修复2

src/views/ecw/product/index.vue

@@ -221,11 +221,11 @@
           <!--            <el-option v-for="item in preferentialList"  :value="item.couponId" :label="item.titleZh" :key="item.couponId" :disabled="item.mandatory">{{item.titleZh}}</el-option>-->
           <!--          </el-select>-->
           <div style="width: 300px;height: 400px;border: 1px solid;overflow-y: auto">
-            <div @click="selectMoveAbout(item)" style="display: flex;justify-content: space-between; align-items: center;" :style="{'cursor':item.mandatory ? 'no-drop' : 'pointer'  }"  v-for="item in preferentialList">
+            <div @click="selectMoveAbout(item)" style="display: flex;justify-content: space-between; align-items: center;" :style="{'cursor':item.mandatory ? 'no-drop' : 'pointer'  }"  v-for="item in preferentialList" :key="item.couponId" >
               <div>
                 {{$l(item, 'title')}}
               </div>
-              <i v-if="form.couponIds.includes(item.couponId)" style="margin-right: 20px;" class="el-icon-check"></i>
+              <i v-if="form.couponIds.includes(item.couponId)"  style="margin-right: 20px;" class="el-icon-check"></i>
             </div>
           </div>
         </el-form-item>
@@ -609,9 +609,8 @@ export default {
       });
     },
     selectMoveAbout(val){
-      console.log(val,'val')
       if(!val.mandatory){
-       let index =   this.form.couponIds.findIndex(i => val.couponId == i)
+       let index = this.form.couponIds.findIndex(i => val.couponId == i)
         if(index >= 0){
           this.$confirm(this.$t(`您确定要将商品从优惠活动${this.$l(val,'title')}中移出吗？`), this.$t('提示'), {
             confirmButtonText: this.$t('确定'),
@@ -619,6 +618,7 @@ export default {
             type: 'warning'
           }).then(() => {
             this.form.couponIds.splice(index,1)
+            this.$forceUpdate()
           }).catch(() => {
 
             });
@@ -629,6 +629,7 @@ export default {
             type: 'warning'
           }).then(() => {
             this.form.couponIds.push(val.couponId)
+            this.$forceUpdate()
           }).catch(() => {
 
           });