如何将密钥添加到添加到 angularfire 2 版本 5 中的节点的对象

Question

我曾经能够像这样在 angularfire2 v.4.x 中将密钥添加到对象本身：

addMatchToDb(match: any){
    let ref = this.db.object('matches/');
    let matchId = this.matches.push(match).key;
    let updates = {};
    updates['/matches/' + matchId + '/id'] = matchId;
    updates['/matches/' + matchId + '/matchCreated'] = firebase.database.ServerValue.TIMESTAMP;
    firebase.database().ref().update(updates);
  }

因为我得到一个错误

error TS2339: Property 'push' does not exist on type 'Observable'<'any'>'

，我考虑重构为：

addMatchToDb(match: any){
    let ref = this.db.object('matches/');
    let matchId = ref.update(match);
  }

但现在我无法将密钥添加为 ID 或时间戳。对版本 5 的新变化有什么建议吗？

更新：关于this.matches的一些细节：

export class DatabaseService {
  matches:Observable<any>;
  weightClasses:Observable<any>;
  giRanks:Observable<any>;
  noGiRanks:Observable<any>;
  ageClasses:Observable<any>;
  users:Observable<any>;
  currentUser:Observable<any>;
  moves:Observable<any>;
  retrievedMatch:Observable<any>;

  constructor(private db: AngularFireDatabase, private textTransformationService: TextTransformationService) {
    this.matches = db.list<Match>('/matches').valueChanges();
    this.weightClasses = db.list<string>('/weightClasses').valueChanges();
    this.giRanks = db.list<string>('/giRanks').valueChanges();
    this.noGiRanks = db.list<string>('/noGiRanks').valueChanges();
    this.ageClasses = db.list<string>('/ageClasses').valueChanges();
    this.users = db.list<User>('/users').valueChanges();
    this.moves = db.list<string>('/moves').valueChanges(); //TODO maybe JSON?
  }

Answer 1

我不太确定，但你的推送必须在 db.list<Match>('/matches') 而不是 db.list<Match>('/matches').valueChanges();

上完成

因此您可以将类型 AngularFireList 添加到您的变量 db.list<Match>('/matches') 并获得 push/update/remove 方法

如何将密钥添加到添加到 angularfire 2 版本 5 中的节点的对象

How to add the key to an object added to a node in angularfire 2 version 5

javascript

firebase

firebase-realtime-database

angularfire2

angular