无法渲染材质ui表格行

Question

我正在尝试从材质 UI 渲染一个表格，其中包含我获取的一些数据。我知道我的数据正在正确获取，因为我能够从其保存状态对其进行控制台记录，但是当我尝试将其映射到表行中时，它不起作用。我的表格成功生成了它的标题，只是正文有空白数据。

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

在箭头函数中，如果你正在写块{..}，你必须使用显式的return语句。

这两个是一样的：

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>
    );
  });
};