el-table唯一标识id不唯一怎么办(不唯一回显勾选数据会错乱)

从tableData中的数据可以看到id并不是唯一的,其中也没有任何一个字段是唯一标识,那么这种情况row-key="id"这样写就会导致我勾选的数据出现错乱,这时候把row-key="id"改成:row-key="tableData=>tableData.id+tableData.type" 就好了

<template>
  <el-table ref="table" :data="tableData" border highlight-current-row :row-key="tableData=>tableData.id+tableData.type" @selection-change="selectionChange">
    <el-table-column type="selection" reserve-selection width="55"></el-table-column>
    <el-table-column align="center" label="编号" width="60" type="index">
    </el-table-column>
    <el-table-column prop="id" label="ID" align="center" />
    <el-table-column prop="type" label="类型" align="center" />
  </el-table>
</template>
<script>
export default {
  components: {
  },
  data() {
    return {
      multipleSelection: [],
      tableData: [
        {
          id: 0,
          type: 'A'
        },
        {
          id: 1,
          type: 'A'
        },
        {
          id: 2,
          type: 'A'
        },
        {
          id: 0,
          type: 'B'
        },
        {
          id: 1,
          type: 'B'
        }
      ]
    }
  },
  mounted() {
  },
  methods: {
    selectionChange(val) {
      this.multipleSelection = val
    }
  }
}
</script>