javascript - See if number is in Firebase -

so have form registers users,

             <form class="" ng-submit="vm.passwordregister()">                 <div class="panel panel-default">                     <div class="panel-heading">                         register                     </div>                     <div class="panel-body">                         <div class="form-group">                             <input type="text" ng-model="vm.number" class="form-control" placeholder="client number" ng-blur="vm.numbercheck()"/>                         </div>                         <div class="form-group">                             <input type="text" ng-model="vm.name" class="form-control" placeholder="your name" />                         </div>                         <div class="form-group">                             <input type="text" ng-model="vm.email" class="form-control" placeholder="e-mail address" />                         </div>                         <div class="form-group">                             <input type="password" ng-model="vm.password" class="form-control" placeholder="password" />                         </div>                         <div class="form-group">                             <input type="password" ng-model="vm.secret" class="form-control" placeholder="account secret" />                         </div>                     </div>                     <div class="panel-footer clearfix">                         <button type="submit" class="btn btn-primary pull-right" ng-if="accountopen.$value">register <i class="fa fa-arrow-right"></i></button>                         <button type="submit" class="btn btn-primary pull-right" ng-if="!accountopen.$value" disabled>register disabled</button>                     </div>                 </div>             </form> 

the user enters customer number @ beginning of form , secret @ end of form.

in end want sure of 2 things before creating user.

1. customer number exists in firebase 2. secret matches customer number entered 

right i'm trying call function vm.numbercheck() checks if customer number or number exists , if returns snapshot or snap user. mark field valid on html side , allow form submission.

my function looks following:

    vm.numbercheck = function ($scope, $vm, $window) {          ref.child('clientnumbers').startat(vm.number).endat(vm.number).once('value', function(snap) {             console.log('accounts matching customer number', snap.val());         });      } 

the way me data returned click in number field , blur without typing (provide empty query) if type in field if copied , pasted firebase returns null.

what doing wrong?

i created jsfiddle , added think of still won't run. here is: https://jsfiddle.net/05dds4v3/5/ connected test firebase application created.

i created working jsbin shows how detect existence of number in list: http://jsbin.com/pesimo/1/edit?js,output

the crucial function is:

function checkifnumberexists(number) {   log('checking if '+number+' exists, may take moment');   ref.child('clientnumbers').child(number).once('value', function(snapshot) {     log('got value, let\'s see if number exists');     if (snapshot.val() === null) {       log('our number not yet exist, let\'s create it');       ref.child('clientnumbers').child(number).set(true, function(error) {         if (error) {           log('error creating number: '+error.tostring());         }          else {           log('number created, check if exists now\n');         }       });     }     else {       log('yes, our number exists\n');     }   }); } 

note did not create angularjs nor angularfire nor jquery, solution focuses purely on detecting if specific child node exists. key in isolating problem (and 1 of steps in providing mcve). reducing problem core, either find cause of problem or make easy possible people (since need debug fewer technologies).