elementUI表格中某个字段（state）使用计算属性进行转换为对应中文显示

代码案例：

<template>
  <el-table
    :data="tableData"
    style="width: 100%"
  >
    <el-table-column
      prop="date"
      label="日期"
      width="180"
    />
    <el-table-column
      prop="name"
      label="姓名"
      width="180"
    />
    <el-table-column
      prop="state"
      label="地址"
    >
      <template slot-scope="scope">
        {{ stateNameMap(scope.row.state) }}
      </template></el-table-column>
  </el-table>
</template>

<script>
export default {
  data() {
    return {
      homeCity: [
        { state: 1, name: '李四' },
        { state: 3, name: '张三' },
        { state: 7, name: '王五' },
        { state: 33, name: '王五1' }
      ],
      state: 1,
      tableData: [{
        date: '2016-05-02',
        name: '王小虎',
        state: 1
      }, {
        date: '2016-05-04',
        name: '王小虎',
        state: 3
      }, {
        date: '2016-05-01',
        name: '王小虎',
        state: 7
      }, {
        date: '2016-05-03',
        name: '王小虎',
        state: 3
      }]
    }
  },
  computed: {

    stateNameMap() {
      return (state) => {
        console.log(state, '>>>')
        // 在homeCity数组中查找具有匹配ID的对象
        const row = this.homeCity.find(r => r.state === state)
        // 如果找到了对象，则返回其name属性；否则，返回一个默认值（如'未知城市'）
        return row ? row.name : '未知城市'
      }
    }
  },
  methods: {

  }
}
</script>

效果图：