用户显隐列添加不同key防止被复用

@@ -140,12 +140,12 @@
 
 
         <el-table v-loading="loading" :data="userList" @selection-change="handleSelectionChange">
         <el-table v-loading="loading" :data="userList" @selection-change="handleSelectionChange">
           <el-table-column type="selection" width="50" align="center" />
           <el-table-column type="selection" width="50" align="center" />
-          <el-table-column label="用户编号" align="center" prop="userId" v-if="columns[0].visible" />
-          <el-table-column label="用户名称" align="center" prop="userName" v-if="columns[1].visible" :show-overflow-tooltip="true" />
-          <el-table-column label="用户昵称" align="center" prop="nickName" v-if="columns[2].visible" :show-overflow-tooltip="true" />
-          <el-table-column label="部门" align="center" prop="dept.deptName" v-if="columns[3].visible" :show-overflow-tooltip="true" />
-          <el-table-column label="手机号码" align="center" prop="phonenumber" v-if="columns[4].visible" width="120" />
-          <el-table-column label="状态" align="center" v-if="columns[5].visible">
+          <el-table-column label="用户编号" align="center" key="userId" prop="userId" v-if="columns[0].visible" />
+          <el-table-column label="用户名称" align="center" key="userName" prop="userName" v-if="columns[1].visible" :show-overflow-tooltip="true" />
+          <el-table-column label="用户昵称" align="center" key="nickName" prop="nickName" v-if="columns[2].visible" :show-overflow-tooltip="true" />
+          <el-table-column label="部门" align="center" key="deptName" prop="dept.deptName" v-if="columns[3].visible" :show-overflow-tooltip="true" />
+          <el-table-column label="手机号码" align="center" key="phonenumber" prop="phonenumber" v-if="columns[4].visible" width="120" />
+          <el-table-column label="状态" align="center" key="status" v-if="columns[5].visible">
             <template slot-scope="scope">
             <template slot-scope="scope">
               <el-switch
               <el-switch
                 v-model="scope.row.status"
                 v-model="scope.row.status"