angularjs - 保持 Angular Controller 薄

Question

目前我正在研究巨大的 Angular SPA 应用程序。我尽量保持我的 Controller 瘦:

<div ng-controller='HomeController as home'>
   <div ng-repeat='var item in home.items' ng-bind='item' ></div>
   <button ng-click='home.remove(1)' >remove</button>
</div>

function HomeController (homeService){
    var vm = this; //$scope
    vm.items = [1,2,3,4,5];
    vm.remove = remove;

    function remove (id){
        homeService.remove({ items: vm.items, targetId: id });
    }

    //a lot of other logic here
}


angular.module('my').service('homeService', homeService);
function homeService (){
    this.remove = remove;

    function remove (param){
        for(var a = 0; a < param.items.length; a++){
            if(param.items[a] == param.targetId){
                param.items.splice(a, 1);
                break;
            }
        }
    }
}

好处:

逻辑在 Controller 之外

缺点:

服务更改范围状态

您保持 Controller 瘦的方法是什么？

Answer 1

What is your approach to keep controllers thin?

我个人喜欢在工厂/服务中保留与应用程序模型相关的任何内容。所以 remove和 item在您的代码中不会在 Controller 中定义。在 Controller 内部，我将设置对模型的引用，以获取指令所需的任何内容，即可通过 $scope 访问.

例如，考虑一个具有实体数组和方法的模型，用于在数组中添加/删除/查找实体。我将首先创建一个工厂，公开我的模型和方法来使用它:

angular.module('myApp').factory('model', function() {

    // private helpers
    var add = function(array, element) {...}
    var remove = function(array, element) {...}
    var find = function(array, id) {...}

    return {
        Entity: function(id) {
            this.id = id;
        },
        entities: {
            entities: [],
            find: function(id) {
                return find(this.entities, id);
            },
            add: function(entity) {
                add(this.entities, entity);
            },
            remove: function(entity) {
                remove(this.entities, entity);
            }       
        }
});

然后将模型传递给我的 Controller :

angular.module('myApp').controller('ctrl', function($scope, model) {
    $scope["model"] = model; // set reference to the model if i have to
    var entity = new model.Entity('foo'); // create a new Entity
    model.entities.add(entity); // add entity to entities
    model.entities.find('foo'); // find entity with id 'foo'
});

等等。