Type 'String' has no compatible call signatures

问题

I'm trying to do a multi-path update using Firebase and AngularFire2. However, I'm getting the error above when I use this:

let fb = firebase.database().ref();
let key = fb.child('/path').push().key();

Any ideas of how I can get the key after pushing something using AngularFire2?

回答1:

As the push method now returns an Observable, the proper way to get the generated $key (using AF2) is doing the following:

let fb = this.af.database.list('/path');
fb.push('item').then(res => console.log(res.key));

来源：https://stackoverflow.com/questions/40453955/type-string-has-no-compatible-call-signatures