var app = angular.module('my_app', [])
app.controller('my_con', ['$scope', '$http', function($scope, $http) {

    $scope.save = function(sector) {
        var del_status = $scope.is_exist(sector);

        console.log(del_status); // is_exsis return value

        if(!del_status) {
            // save
        }
    }

    $scope.is_exist = function(sector) {
        $http({
            method : 'POST',
            url : '/is_data_exist',
            contentType : 'application/json; charset=utf-8',
            data : angular.toJson({
                'sector': sector
            }),
            dataType: 'json',
        }).then(function successCallback(response) {

            console.log(response.data); //http respond

            if(response.data == 'False') {
                return false;
            }
            else {
                return true;
            }
        })
    }
}])

var del_status = $scope.is_exsis(function(data){
    console.log(del_status); // is_exsis return value

    if(!del_status) {
        // save
    }
 });

$scope.save = function(sector) {
    $scope.is_exsis(sector).then(function(del_status){

        console.log(del_status); // is_exsis return value

        if(!del_status) {
        // save
        }
   });

}

$scope.is_exist = function(sector) {
    return $http({
        method : 'POST',
        url : '/is_data_exist',
        contentType : 'application/json; charset=utf-8',
        data : angular.toJson({
            'sector': sector
        }),
        dataType: 'json',
    }).then(function successCallback(response) {

        console.log(response.data); //http respond

        if(response.data == 'False') {
            return false;
        }
        else {
            return true;
        }
    })
}