el-select change下拉获取对象

      <el-select
            v-if="model"
            filterable
            class="w"
            v-model="ruleForm.allModelId"
            placeholder="请选择"
            @change="changeModel($event)"
          >
            <el-option
              v-for="item in model"
              :key="item.id"
              :label="item.modelName"
              :value="item.id"
            ></el-option>
          </el-select>

    changeModel(id) {
      let obj = {};
      obj = this.model.find((item) => {
        //model就是上面的数据源
        return item.id === id; //筛选出匹配数据
      });
      console.log(obj);
      this.ruleForm.allModelName = obj.modelName;
      this.ruleForm.allModelId = obj.id;
    },

 多选

    // 汇总提交人改变
    planSubmitChange (val) {
      console.log(val)
      let role = { ...this.role }
      let arr = [];for (let i = 0; i < val.length; i++) {
        let obj = {};
        obj = this.planSubmitOptions.find((item) => {
          //model就是上面的数据源
          return item.id === val[i]; //筛选出匹配数据
        });
        console.log(obj);
        if (obj.id) {
          arr.push({ relationLineId: obj.id, relationLineName: obj.relationLineName })
        }
      }
      role.planRelationLines = arr;
      role.lineInfos = arr2;
      this.role = role
      console.log(arr)
    },