Question

我正在尝试从材料UI渲染一个表格，其中包含一些我提取的数据。我知道我的数据可以正确获取，因为我可以从其保存状态进行console.log记录，但是当我尝试在表行中映射它时，它不起作用。我的表成功生成了其标题，只是正文的空白数据。

gameDataTableRow = scheduleData => {
    scheduleData.map(game => {
      console.log(game.scheduled); <--These console logs will display data properly
      console.log(game.venue.name);
      console.log(game.home.name);
      console.log(game.away.name);
      return (
        <TableRow key={game.venue.id}>
          <TableCell>{game.scheduled}</TableCell> <-- These cells wont render in the table row
          <TableCell>{game.venue.name}</TableCell>
          <TableCell>{game.home.name}</TableCell>
          <TableCell>{game.away.name}</TableCell>
        </TableRow>
      );
    });
  };

render() {
    console.log(this.state.games);
    return (
      <Table>
        <TableHead>
          <TableRow>
            <TableCell numeric>Date</TableCell>
            <TableCell>Venue</TableCell>
            <TableCell>Home</TableCell>
            <TableCell>Away</TableCell>
          </TableRow>
        </TableHead>
        <TableBody>{this.gameDataTableRow(this.state.games)}</TableBody>
      </Table>
    );
  }
}

Answer 1

在箭头功能中，如果要编写块{..}，则必须使用显式的return语句。

这两个是相同的：

let foo1 = (val1) => val1 * 2;
let foo1 = (val1) => { return val1 * 2 };

问题的解决方案：

gameDataTableRow = scheduleData => {
   return scheduleData.map(game => { //Added return statement
    console.log(game.scheduled); <--These console logs will display data properly
    console.log(game.venue.name);
    console.log(game.home.name);
    console.log(game.away.name);
    return (
    <TableRow key={game.venue.id}>
      <TableCell>{game.scheduled}</TableCell> <-- These cells wont render in the table row
      <TableCell>{game.venue.name}</TableCell>
      <TableCell>{game.home.name}</TableCell>
      <TableCell>{game.away.name}</TableCell>
    </TableRow>
    );
  });
};

无法呈现材料ui表行

1 个答案: