Backbone.js 主干、requirejs、多视图、一个集合

下面您可以看到四个基本的requireJS文件。如何让多个Backbone.js视图共享一个已在别处启动和获取的集合

请注意

我知道我可以在App.js中传递集合，但我不想这样做，因为我可能有许多集合需要在许多视图中使用，我不想在App.js中传递每个集合

Collection.js

return Backbone.Collection.extend({
    url: '...'
});

var collection = new Collection();

$.when(collection.fetch()).done(function(){
    new View1();
    new View2();
});

define(['Collection'], function(Collection){
    return Backbone.View.extend({
        initialize: function(){
            console.log('Need the initiated, fetched collection here...');
        });
    });
});

define(['Collection'], function(Collection){
    return Backbone.View.extend({
        initialize: function(){
            console.log('Need the initiated, fetched collection here...');
        });
    });
});

var CollectionConstructor = Backbone.Collection.extend({
    url: '...'
});
var CollectionInstance = new CollectionConstructor();
return CollectionInstance;

var AppGlobals = AppGlobals || {};
AppGlobals.oneSet = new Collection ();
AppGlobals.anotherSet = new Collection ();

App.js

return Backbone.Collection.extend({
    url: '...'
});

var collection = new Collection();

$.when(collection.fetch()).done(function(){
    new View1();
    new View2();
});

define(['Collection'], function(Collection){
    return Backbone.View.extend({
        initialize: function(){
            console.log('Need the initiated, fetched collection here...');
        });
    });
});

define(['Collection'], function(Collection){
    return Backbone.View.extend({
        initialize: function(){
            console.log('Need the initiated, fetched collection here...');
        });
    });
});

var CollectionConstructor = Backbone.Collection.extend({
    url: '...'
});
var CollectionInstance = new CollectionConstructor();
return CollectionInstance;

var AppGlobals = AppGlobals || {};
AppGlobals.oneSet = new Collection ();
AppGlobals.anotherSet = new Collection ();

View1.js

return Backbone.Collection.extend({
    url: '...'
});

var collection = new Collection();

$.when(collection.fetch()).done(function(){
    new View1();
    new View2();
});

define(['Collection'], function(Collection){
    return Backbone.View.extend({
        initialize: function(){
            console.log('Need the initiated, fetched collection here...');
        });
    });
});

define(['Collection'], function(Collection){
    return Backbone.View.extend({
        initialize: function(){
            console.log('Need the initiated, fetched collection here...');
        });
    });
});

var CollectionConstructor = Backbone.Collection.extend({
    url: '...'
});
var CollectionInstance = new CollectionConstructor();
return CollectionInstance;

var AppGlobals = AppGlobals || {};
AppGlobals.oneSet = new Collection ();
AppGlobals.anotherSet = new Collection ();

View2.js

return Backbone.Collection.extend({
    url: '...'
});

var collection = new Collection();

$.when(collection.fetch()).done(function(){
    new View1();
    new View2();
});

define(['Collection'], function(Collection){
    return Backbone.View.extend({
        initialize: function(){
            console.log('Need the initiated, fetched collection here...');
        });
    });
});

define(['Collection'], function(Collection){
    return Backbone.View.extend({
        initialize: function(){
            console.log('Need the initiated, fetched collection here...');
        });
    });
});

var CollectionConstructor = Backbone.Collection.extend({
    url: '...'
});
var CollectionInstance = new CollectionConstructor();
return CollectionInstance;

var AppGlobals = AppGlobals || {};
AppGlobals.oneSet = new Collection ();
AppGlobals.anotherSet = new Collection ();

---

快速回答：RequireJS只运行一次函数体代码，多次单独运行

return

语句。因此，您可以创建一个集合实例，并将其返回给每个需要它的人

Collection.js

return Backbone.Collection.extend({
    url: '...'
});

var collection = new Collection();

$.when(collection.fetch()).done(function(){
    new View1();
    new View2();
});

define(['Collection'], function(Collection){
    return Backbone.View.extend({
        initialize: function(){
            console.log('Need the initiated, fetched collection here...');
        });
    });
});

define(['Collection'], function(Collection){
    return Backbone.View.extend({
        initialize: function(){
            console.log('Need the initiated, fetched collection here...');
        });
    });
});

var CollectionConstructor = Backbone.Collection.extend({
    url: '...'
});
var CollectionInstance = new CollectionConstructor();
return CollectionInstance;

var AppGlobals = AppGlobals || {};
AppGlobals.oneSet = new Collection ();
AppGlobals.anotherSet = new Collection ();

---

或者，如果您想要运行多个CollectionInstance实例，并且不想将其传递给视图，那么我不认为缺少全局变量会有帮助。这看起来像：

Globals.js

return Backbone.Collection.extend({
    url: '...'
});

var collection = new Collection();

$.when(collection.fetch()).done(function(){
    new View1();
    new View2();
});

define(['Collection'], function(Collection){
    return Backbone.View.extend({
        initialize: function(){
            console.log('Need the initiated, fetched collection here...');
        });
    });
});

define(['Collection'], function(Collection){
    return Backbone.View.extend({
        initialize: function(){
            console.log('Need the initiated, fetched collection here...');
        });
    });
});

var CollectionConstructor = Backbone.Collection.extend({
    url: '...'
});
var CollectionInstance = new CollectionConstructor();
return CollectionInstance;

var AppGlobals = AppGlobals || {};
AppGlobals.oneSet = new Collection ();
AppGlobals.anotherSet = new Collection ();

您现在可以让您的视图依赖于Globals.js并从这里访问它们。根据您的使用情况，这两种方法中的任何一种都应该有效。请记住，在第二种方法中，您的Collection.js是未修改的