Question

评论的部分位于 $ scope。$ on 下。我需要将选项返回到我保留 $ scope。$ emit 的地方。请帮助!!!

if (gridConfig.Batch) {
                gridOption.dataSource.transport["parameterMap"] = function (options, operation) {
                    var data = {
                        options: options,
                        operation: operation
                    };
                    $scope.$emit('parameterMap', data);
                    //if (operation !== "read" && options.models) {
                    //    angular.forEach(options.models, function (value) {
                    //        value.MfgDt = kendo.toString(value.MfgDt, "s");
                    //        value.ExpDt = kendo.toString(value.ExpDt, "s");
                    //        value.ProductType = value.ProductType.Id;
                    //    })
                    //    return options;
                    //}
                }
            }

Answer 1

我不确定我理解你的问题，但是如果我这样做，你需要从 $ scope。$ on 到你的 $ scope.emit 的回调函数。如果是这样，下面的代码将对您有所帮助，请告诉我它是否有效，因为我还没有测试过。

if (gridConfig.Batch) {
            gridOption.dataSource.transport["parameterMap"] = function (options, operation) {
                var data = {
                    options: options,
                    operation: operation
                };
                $scope.$emit('parameterMap', data,function(returnedData){
                      //returnedData.options = the updated options
                });

            }
        }

<强> $ $范围上：

$scope.$on('parameterMap', function (e, data,callback) {
    if (data.operation !== "read" && data.options.models) {
        angular.forEach(options.models, function (value) {
            value.MfgDt = kendo.toString(value.MfgDt, "s");
            value.ExpDt = kendo.toString(value.ExpDt, "s");
            value.ProductType = value.ProductType.Id;
        })
        callback(data);
    }

})

Answer 2

我认为您可以使它比其他答案更简单，只需调整指令中的数据，然后将其用作返回值即可。

if (gridConfig.Batch) {
            gridOption.dataSource.transport["parameterMap"] = function (options,   operation) {
                var data = {
                    options: options,
                    operation: operation
                };
                $scope.$emit('parameterMap', data);

                // by the time we reach here the directive 
                // will have altered the data object
                if (data.operation !== "read" && data.options.models) {
                    angular.forEach(options.models, function (value) {
                        value.MfgDt = kendo.toString(value.MfgDt, "s");
                        value.ExpDt = kendo.toString(value.ExpDt, "s");
                        value.ProductType = value.ProductType.Id;
                    })
                    return options;
                }
            }
        }

在指令中：

$scope.$on('parameterMap', function (e, data) {
   data.operation = "write" ; 
   data.options = {models: 'something here'} 
   // do something else here, whatever the purpose of the directive is
}

如何从$ scope。$ on返回一些值到$ scope。$ emit

2 个答案: