解决angularjs中同步执行http请求的方法

self.tableParams = new NgTableParams({}, {
  getData: function (params) {
    $http.post("rest/staff/page", $scope.req).success(function (data) {
      if (data != null && data != undefined) {
        $scope.staffs = data.data;
        params.total($scope.totalPage);
      }
    }).error(function (data) {
      $("#serverErrorModal").modal({show: true});
    });
 
    return $scope.staffs;
  }
});

self.tableParams = new NgTableParams({'count': 10} , {
  getData: function (params) {
    var promise = $http.post("rest/staff/page", $scope.req);
    return promise.then(function (resut) {
      var response = resut.data;
      var total = response.otherData[0];
      params.total(total);
      return response.data;
    });
 
  }
});