类型'{的参数:查询:{limitToLast:数字； orderByKey:布尔值; }; }"不可分配给"FirebaseListFactoryOpts"类型的参数 [英] Argument of type '{ query: { limitToLast: number; orderByKey: boolean; }; }' is not assignable to parameter of type 'FirebaseListFactoryOpts'

问题描述

    user: any;
     chatMessages: FirebaseListObservable<ChatMessage[]>;
     chatMessage: ChatMessage;
     userName: Observable<string>;
         constructor(
        public db: AngularFireDatabase,
        public afAuth: AngularFireAuth,
      ) { 
        this.afAuth.authState.subscribe(auth => {
          if (auth !== undefined && auth !== null){
            this.user = auth;
          }
        });
      }
    sendMessage(msg: string){
    const timestamp = this.getTimeStamp();
    const email = this.user.email;
    this.chatMessages = this.getMessages();
    this.chatMessages.push({
      message: msg,
      timeSent: timestamp,
      userName: this.userName,
      email: email});
  }

  getMessages(): FirebaseListObservable<ChatMessage[]>{
    return this.db.list('/messages', {
      query: {
        limitToLast: 25,
        orderByKey: true
      }
    });
  }

我正在使用angular和firebase制作一个网络聊天应用程序，然后出现此错误，即查询不是FireBaseListFactoryOpts的兼容类型. 如果有人可以，请提供帮助.

i was making a web chat app using angular and firebase then i got this error that query is not a compatible type of FireBaseListFactoryOpts. please help if anyone can.

推荐答案

getMessages(): AngularFireList<ChatMessage[]> {
return this.db.list('messages',ref => ref.orderByKey().limitToLast(25));
}

使用它代替现在使用，因为FireBaseListObservable被AngularFirelist取代了.

use this instead of that now this will work because FireBaseListObservable is replaced with AngularFirelist.

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