javascript - Get key based on a sub-attribute match -

so if have tree structured following in firebase how can fetch unique key name == "employee 1" , should return key "ljrwjlgupwuapqx0ok09cswikxg2" ?

"users" : {     "ljrwjlgupwuapqx0ok09cswikxg2" : {       "shifts" : {         "dfaskjhfkashdf" : {           "endtime" : 1490907600,           "starttime" : 1490878800         }       },       "email" : "employee1@gmail.com",       "employeeid" : "ljrwjlgupwuapqx0ok09cswikxg2",       "fcmtoken" : "eovpmlxy9fc:apa91bechct-jwnh14ylrkwbdwbr-kjwj_fznogwszu-2jbl2hd5trtl-7gkavlsihszjmj2_f7fjdhugnu464ekngatujov0zulbjmlxtjeghhrcbdtbkm_j_yih29idxhvjmxbfvhw",       "name" : "employee 1",       "password" : "employee1",       "startdate" : "2017-01-23"     } 

if understand question correctly, ought trick:

firebase.database().ref('users')   .orderbychild('name')   .equalto('employee 1')   .limittofirst(1)   .once('value', snap => {     let key = object.keys(snap.val())[0]; // ljrwjlgupwuapqx0ok09cswikxg2     let user = snap.child(key).val(); // whole user object   });