How do I get a splice () on an http.get using Ionic / Angularjs to search?

I want to filter according to what the user types on the screen. I have a form with ng-model="q" and | filter:q

Where my http.get step is the parameters I'm filtering, where ng-model is the "find:

$scope.pagination = {
        limit: 10,
        offset: 0
    };
    $scope.pagination.limit = 8;
    $scope.pagination.offset = 0;
    $scope.q = '';
    $scope.noMoreItemsAvailable = false;
    $scope.ofertass = [];
    $scope.getRecord = function () {
        $http.get("http://meusite.com.br/admin/apis/api_listagem/lista_oferta_api.php?json=promocao" + "&latitude=" + $scope.lat_cliente + "&longitude=" + $scope.long_cliente + "&raio=" + $scope.raio + "&limit=" + $scope.pagination.limit + "&offset=" + $scope.pagination.offset + "&busca=" + $scope.q).then(function (response) {
                // console.log(response.data);
                if (response.data.length) {
                    $scope.ofertass.push.apply($scope.ofertass, response.data);
                    $scope.pagination.offset = $scope.pagination.offset + $scope.pagination.limit;
                    window.localStorage.setItem("data_ofertass", JSON.stringify(response.data));

                } else {
                    $scope.noMoreItemsAvailable = true;
                    if (window.localStorage.getItem("data_ofertass") === null) {
                        $state.go("nhaac.nachegamos");
                    }

                }
            },
            function (response) {
                // error message
                var alertPopup = $ionicPopup.alert({
                    title: "error " + response.status,
                    template: response.statusText + "<br/>Problema: Conexão com sua Internet.",
                });
            }).finally(function () {
            console.log("finally....");
            $scope.$broadcast('scroll.infiniteScrollComplete');

        });
    }

    $scope.doRefresh = function () {
        limit = 20;
        offset = 0;
        $scope.q = '';
        $scope.noMoreItemsAvailable = false;
        $scope.getRecord();
    };

It works fine, but when I empty the search field it returns blank results with the last filter down.

Follow my search in View:

<center>
        <form ng-submit="fechaTeclado()">
            <div class="bar bar-subheader bar-light">
                <label class="item item-input item-floating-label">
                    <i class="icon ion-search placeholder-icon"></i>
                    <input type="text" size="100" ng-model="q" placeholder="Procurar" type="submit" ng-submit="fechaTeclado()" ng-click="fechaTeclado()" />
                    <input type="submit" id="submit" value="OK" ng-click="fechaTeclado()" />

                </label>
            </div>
        </form>
    </center>

What am I doing wrong? I test the URL with the parameters and it works fine ...

If I leave "& search=" empty I list everything. This is correct. But in my application, it is not cleaning up the search.

EDIT:

You have the KeyDate () function that is just to close the device keyboard:

$scope.fechaTeclado = function (q) {
    $cordovaKeyboard.close();
    $scope.q = q;        
    $scope.getRecord();
};

I think of using a slice () or splice () in getRecord, to eliminate what it should not look like:

Notice in the image above that there are white spaces that were filled before the filter, and if drag shows what was searched.

But I'm on a good logic how to do this.