javascript - Linking External accounts with Firebase Auth + Firebase DB -


i use firebase auth manage users , tie them firebase db store data. when trying make updates firebse db users find myself doing things this: 

const users = firebase.database().ref(`users`); let provider = new firebase.auth.googleauthprovider();  firebase.auth().currentuser.linkwithpopup(provider).then(function(result) {     // accounts linked.     let credential = result.credential;     let user = result.user;     let key = '';     let userref = '';       users.orderbychild('uid').equalto(user.uid).once('value').then(snapshot => {         snapshot.foreach((child) => {             key = child.key;             userref = firebase.database().ref(`users/${key}`);             let updateduser = {};              userref.update({                 linkedaccounts: user.providerdata             });              userref.once('value').then(snapshot => {                 updateduser = snapshot.val();                  dispatch({                     action: link_google,                     payload: updateduser                 });             });              return;         });     });  }).catch(function(error) {     // handle errors here.     dispatch(autherror(error)); });

in example i'm linking new auth provider (google). on client side need disable button checks sort out whether user has data etc. i'm using react/redux call dispatch() send action , client updated new user in application's state. working (to extent), however, have couple questions...

1. in example updateduser not contain key user. meaning looks like:

{ displayname: 'frank smith', photourl: '', uid: 12345 }

... when want whole object like:

'-f12345asdfg': { displayname: 'frank smith', photourl: '', uid: 12345 }

... key included remain consistent way data returned elsewhere. know can make second fb db call user uid (like above) return way want seems inefficient...

2. is efficient/effective way this? seems messy.

thanks in advance!


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