Create error in angularJs - html

Question

This is my angular controller:
app.controller("custctrl",["$scope","Restangular",function($scope,Restangular){
$scope.createcust=function(){
Restangular.all("customer").post($scope.cust);
console.log($scope.cust);
};
}]);
In the console I can find the object but the insertion failed and I get this error:
angular.js:10765 POST http://localhost:9000/customer 400 (Bad Request)
I'm using a modal and this is a part of my code:
<div id="inputModalCust" class="modal fade" ng-controller="custctrl" >
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h4 class="modal-title"><Strong><i class="fa fa-file"></i> Customer </Strong></h4>
</div>
<div class="modal-body">
<form class="form-horizontal" >
<div class="form-group">
<label for="input" class="col-md-2 control-label">Name</label>
<div class="col-md-10">
<input type="text" ng-model="cust.identity.companyName" class="form-control" placeholder="Value">
</div>
</div>
<div class="form-group">
<label for="input" class="col-md-2 control-label">logo</label>
<div class="col-md-10">
<input type="text" ng-model="cust.logo" class="form-control" placeholder="Value">
</div>
</div>
<div class="form-group">
<label for="input" class="col-md-2 control-label">Email</label>
<div class="col-md-10">
<input type="text" ng-model="cust.linkset" class="form-control" placeholder="Value">
</div>
</div>
<div class="form-group">
<label for="input" class="col-md-2 control-label">Phone</label>
<div class="col-md-10">
<input type="text" ng-model="cust.colorSet" class="form-control" placeholder="Value">
</div>
</div>
<div class="form-group">
<label for="input" class="col-md-2 control-label">Website</label>
<div class="col-md-10">
<input type="text" ng-model="cust.webSite" class="form-control" placeholder="Value">
</div>
</div>
<div class="form-group">
<label for="input" class="col-md-2 control-label">Category</label>
<div class="col-md-10">
<input type="text" ng-model="cust.category" class="form-control" placeholder="Value">
</div>
</div>
<div class="form-group">
<label for="input" class="col-md-2 control-label">Time zone</label>
<div class="col-md-10">
<input type="text" ng-model="cust.timeZone" class="form-control" placeholder="Value">
</div>
</div>
</form>
</div>
<div class="modal-footer">
<button type="button" data-dismiss="modal" class="btn btn-default" ><i class="gi gi-remove_2"></i> <Strong>Close</Strong></button>
<button type="button" data-dismiss="modal" class="btn btn-primary" ng-click="createcust()"><i class="gi gi-floppy_saved" ></i><Strong> Save</Strong></button>
</div>
</div>
</div>
</div>

Answer 1

The problem is that I had a wrong field, timeZone is an int this is why I had to change the type here from text to number:
<div class="form-group">
<label for="input" class="col-md-2 control-label">Time zone</label>
<div class="col-md-10">
<input type="**number**" ng-model="cust.timeZone" class="form-control" placeholder="Value">
</div>
</div>