不要在模板中循环集合。如果你想这样做，最好使用HTML片段和AJAX。相反，使用一个渲染其自身视图的Backbone View（细粒度是减少服务器同步和页面刷新的关键）。这是递归的，可以重复此模式，直到没有更多相关数据可循环。
——Jonathan Otto 在 《面向普通人的 Backbone.js 概念理解》 中指出
当你想渲染子视图时，当然会有一些注意事项。
我进行了代码搜索，试图找到一些如何做这个的示例。结果发现TodoMVC示例是一个很好的模型。从Strider-CD源代码（MIT许可证）中得知：
var UserView = Backbone.View.extend({
//... is a class. not sure how to put that here
tagName: "option",
// Cache the template function for a single item.
template: _.template($('#user-item-template').html()),
// The DOM events specific to an item.
// maybe could put links here? but then user couldn't see on mouse-over
// The UserView listens for changes to its model, re-rendering. Since there's
// a one-to-one correspondence between a **User** and a **UserView** in this
// app, we set a direct reference on the model for convenience.
initialize: function() {
_.bindAll(this, 'render');
this.model.bind('change', this.render);
this.model.bind('destroy', this.remove);
},
// Re-render the contents of the User item.
render: function() {
$(this.el).html(this.template(this.model.toJSON()));
return this;
},
// Remove the item, destroy the model.
clear: function() {
this.model.clear();
}
});
// The Application
// ---------------
// Our overall **AppView** is the top-level piece of UI.
var UsersView = Backbone.View.extend({
// Instead of generating a new element, bind to the existing skeleton of
// the App already present in the HTML.
el: $("#user-form"),
// no events here either at this time
// At initialization we kick things off by
// loading list of Users from the db
initialize: function() {
_.bindAll(this, 'addAll', 'addOne','render');
Users.bind('add', this.addOne);
Users.bind('reset', this.addAll);
Users.bind('all', this.render);
console.log("fetching Users");
Users.fetch();
},
// Re-rendering the App just means refreshing the statistics -- the rest
// of the app doesn't change.
render: function() {
console.log("rendering User AppView");
// might want to put some total stats for the Users somewhere on the page
},
// Add a single todo item to the list by creating a view for it, and
// appending its element to the `<ul>`.
addOne: function(User) {
console.log("adding one User: " + User.get("id") + "/" + User.get("email"));
var view = new UserView({model: User});
this.$("#user-list").append(view.render().el);
},
// Add all items in the **Users** collection at once.
addAll: function() {
console.log("adding all Users");
console.log(Users.length + " Users");
Users.each(this.addOne);
}
});
// Finally, we kick things off by creating the **App**.
console.log("starting userapp now");
var UsersApp = new UsersView();
});
选择列表视图与选项子视图的其他示例可在以下位置找到：