Angular/Typescript - 元素隐式具有“任何”类型，因为索引表达式不是“数字”类型

Question

我得到错误元素隐含地具有“任何”类型，因为当我不使用 selected_team 值之类的键时，索引表达式不是“数字”类型。 HTML：

<option *ngFor="let player of teams[selected_team]" value="player.name">...</option>

代码：

selected_team = "";
teams: OverviewTeamType[] = [];

界面：

export interface OverviewTeamType {
  name: string;
  players: [
    {
      age: number;
      birthday: string;
      height: number;
      hokejczId: number;
      id: string;
      name: string;
      position: string;
      stick: string;
      surname: string;
      weight: number;
      yearOfBirth: number;
    }
  ];
  shortName: string;
  shortcut: string;
}

Answer 1

我想这就是你想要的。 ngFor 语句中的teams.find(team => team.name === selectedTeam).players 而不是teams[selectedTeam]。

<option *ngFor="let player of teams.find(team => team.name === selectedTeam).players" value="player.name">...</option>

export interface OverviewTeamType {
  name: string;
  players: {
      age: number;
      birthday: string;
      height: number;
      hokejczId: number;
      id: string;
      name: string;
      position: string;
      stick: string;
      surname: string;
      weight: number;
      yearOfBirth: number;
    }[];
  shortName: string;
  shortcut: string;
}

selected_team = "";
teams: OverviewTeamType[] = [];