TS7053：元素隐式具有“任何”类型，因为“字符串”类型的表达式不能用于索引类型“对象”

Question

我尝试直接使用 templateDrivenForm 发布数据并从 fireBase 获取数据，但显示以下类型错误。

我的部分代码

//directly posts datas using submitButton from templateDrivenForm
 onCreatePosts(postDatas:{title:string, content:string}){
this.http.post('https://ng-complete-guide-b3d7f-default-rtdb.firebaseio.com/posts.json',
 postDatas)
.subscribe(
 responseData => {
  console.log(responseData);
 });
 }

 //get datas from database
   private fetchPost(){
     return this.http.get('https://ng-complete-guide-b3d7f-default-rtdb.firebaseio.com/posts.json')
   .pipe(map(responseData =>  {
     const dataArray = [];
    for(let key in responseData){
    if(responseData.hasOwnProperty(key)){
    dataArray.push({...responseData[key], id:key});
    }
  }
  return dataArray;
 }))
  .subscribe( responseData => {
  console.log(responseData)
 })
}

我的错误是

     Error: src/app/app.component.ts:40:28 - error TS7053: Element implicitly has an 'any' type 
      because 
     expression of type 'string' can't be used to index type 'Object'.
      No index signature with a parameter of type 'string' was found on type 'Object'.

     40         dataArray.push({...responseData[key], id:key});

Answer 1

解决办法

      private fetchPost(){
      return this.http.get('https://ng-complete-guide-b3d7f-default- 
      rtdb.firebaseio.com/posts.json')
    .pipe(map((responseData:{[data:number]:any}) =>  {
     const dataArray = [];
     for(let key in responseData){
  if(responseData.hasOwnProperty(key)){
    dataArray.push({...responseData[key], id:key});
  }
  }
    return dataArray;
  }))
 .subscribe( responseData => {
  console.log(responseData)
 })
 }

 .pipe(map((responseData:{[data:number]:any}) //object type