将属性从一个指令转移到另一个指令

Question

我有指令foo，我想在另一个指令dropdown上使用它。问题是，dropdown指令在模板中使用了另一个名为kendo-drop-down-list的指令。

我想能写

<dropdown foo>

结果应该是

<select data-kendo-drop-down-list options='dropdownOptions' data-ng-model='selected' foo="bar"></select>

问题是foo是可选的，这意味着指令将同时被使用，比如<dropdown>和<dropdown foo="bar">。

如何传递属性？还是我做错了什么，因为我结束了这个问题？

指令

app.directive('dropdown', function() {
    return {
        restrict: "AE",
        scope: {
            selected: "=ngModel",
        },
        template: "<select data-kendo-drop-down-list data-k-options='dropdownOptions' data-ng-model='selected'></select>",
        controller: [
            '$scope', function($scope) {                
                $scope.dropdownOptions = {
                    dataSource: {
                        type: "odata-v4",
                        transport: {
                            read: {
                                url: "odata/Products",
                                dataType: "json",
                            }
                        },
                        serverFiltering: true,
                    }
                };
            }
        ]
    };
);

Answer 1

设法弄清楚了。受此https://stackoverflow.com/a/27261632/1220627的启发

app.directive('dropdown', function() {
    return {
        restrict: "AE",
        scope: {
            selected: "=ngModel",
        },
        template: function(element, attrs) {
            var templateHtml = "<select data-kendo-drop-down-list data-k-options='dropdownOptions' data-ng-model='selected'></select>";
            var templateElement = angular.element(templateHtml);

            _.pairs(attrs.$attr).forEach(function (pair) {
                var attributeName = pair[0];
                var attributeNameActual = pair[1];
                // ignore attribute(s) from scope
                if (attributeName === "ngModel")
                    return;

                var attributeValue = attrs[attributeName];
                templateElement.attr(attributeNameActual, attributeValue);
            });

            return templateElement;
        },
        controller: [
            '$scope', function($scope) {                
                $scope.dropdownOptions = {
                    dataSource: {
                        type: "odata-v4",
                        transport: {
                            read: {
                                url: "odata/Products",
                                dataType: "json",
                            }
                        },
                        serverFiltering: true,
                    }
                };
            }
        ]
    };
);

Answer 2

您可以将控制器的$scope变量从directiveA传递给directiveB，如下所示：

​

var myApp = angular.module('myApp', []);

myApp.directive('directiveA', function() {
    return {
        restrict: 'E',
        template: '<directive-b foo="data"></directive-b>',
        scope: {
            data: '='
        }
    }
});

myApp.directive('directiveB', function() {
    return {
        restrict: 'E',
        template: '{{data}} I am Directive B!',
        scope: {
            data: '=foo'
        }
    }
});

myApp.controller('MyCtrl', function($scope) {
    $scope.foo = 'Hi there!';
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>

<div ng-app="myApp" ng-controller="MyCtrl">
    <directive-a data="foo"></directive-a>
</div>

​