Question

我正在尝试将[无状态组件] React / Redux应用程序中的select填充为：

const FillSelect = ({team}) => <option value={team.onboardingOrder}>{team.name}</option>

const TeamSelector = ({teams}) => {
  return (
    <select>
      <option value="">All</option>
      {
        teams ? (teams => teams.map(team => <FillSelect team={team} />)) : null
      }
    </select>
  )
}

小组看起来像是：{0:{id: 1, name: "Program Management", onboardingOrder: 0, …}, 1: {id: 2, name: "Value Capture", onboardingOrder: 1, …}…}。

它返回错误：Functions are not valid as a React child. This may happen if you return a Component instead of <Component /> from render. Or maybe you meant to call this function rather than return it. in select ...

这是因为我使用的是map()吗？这样做的正确方法是什么？

Answer 1

你不是直接打电话给地图;如果teams是真实的，则返回一个函数（teams => ...）。您可能希望该行看起来像这样：

teams ? teams.map(team => <FillSelect team={team} />) : null

哪会产生<FillSelect />的数组。

Answer 2

这很好用：

  return (
    <select>
      <option value="">All</option>
      {
        Object.values(teams).map((team, i) => <option value={team.onboardingOrder} key={i}>{team.name}</option> )
      }
    </select>
  )

使用React.JS选择 - 动态填充的选项

2 个答案: