使用Backbone.js和underscore.js的新功能,尝试为我的menulist(第一级)创建子菜单(第二级)列表。
所以这是我用JSON创建的menulist(我通过将其打印到浏览器控制台确认存在):
[
{
"name": "Sök kund",
"path":
[
{
"subName": "Fondkonto",
"subPath": "#fondkonto"
},
{
"subName": "Kassakonto",
"subPath": "#kassakonto"
},
{
"subName": "Nytt sparande",
"subPath": "#nyttsparande"
}
]
},
{
"name": "Ny kund",
"path": "#new_customer"
},
{
"name": "Dokument",
"path": "#documents"
},
{
"name": "Blanketter",
"path": "#forms"
}
]
这是我在我的索引文件中显示的代码,现在只打印第一级:
<script type="text/template" id="menus">
{{ _.each(menus, function(menu) { }}
<li><a href="{{= menu.path }}">{{= menu.name }}</a>
<ul>
<li>
<a href="{{= menu.path.subPath }}">{{= menu.path.subName }}</a>
</li>
</ul>
</li>
{{ }); }}
</script>
如果您想知道视图和模型/集合是如何构建的:
var Menus = require("../collections/menus");
var AllMenus = Backbone.View.extend({
el: "#menuContent",
template: _.template(document.getElementById("menus").innerHTML),
initialize: function() {
"use strict";
this.menus = new Menus();
this.listenTo(this.menus, "reset", this.render);
this.menus.fetch({
reset: true,
url: "./data/menus.json",
success: function() {
console.log("Succesfully loaded menus.json file.");
},
error: function() {
console.log("There was some error trying to load and process menus.json file.");
}
});
},
render: function() {
console.log( this.menus.toJSON());
this.$el.html(this.template({ menus: this.menus.toJSON() }));
return this;
}
});
var viewMenus = new AllMenus();
型号:
var Menu = Backbone.Model.extend({
defaults: {
name: "",
path: ""
}
});
module.exports = Menu;
收藏:
var Menu = require("../models/menu");
var Menus = Backbone.Collection.extend({
model: Menu
});
module.exports = Menus;
不要意味着要粘贴这么多代码,但是必须要这样做,这样你才能理解我是如何构建它的。但是,我试图向我的subMenus展示它并没有成功,我陷入了困境。
答案 0 :(得分:1)
您的数据结构错误。您不希望在字符串和数组之间切换path
值。 path
应始终为String,您应该创建一个新属性来保存子菜单数组; “子菜单”将是一个好名字。此外,您的子菜单项不应包含subName
和subPath
作为键名。这些对象在概念上与其父对象相同,并且它们应具有相同的键name
和path
。
您修改后的数据结构应如下所示:
var menus = [
{
"name": "Sök kund",
"path": "#",
"submenu": [
{
"name": "Fondkonto",
"path": "#fondkonto"
},
{
"name": "Kassakonto",
"path": "#kassakonto"
},
{
"name": "Nytt sparande",
"path": "#nyttsparande"
}
]
},
{
"name": "Ny kund",
"path": "#new_customer",
"submenu": []
},
{
"name": "Dokument",
"path": "#documents",
"submenu": []
},
{
"name": "Blanketter",
"path": "#forms",
"submenu": []
}
];
接下来,我们将更新您的模板,以有条件地重复其顶级菜单项和:
<script type="text/template" id="menus">
{{ _.each(menus, function(menu) { }}
<li>
<a href="{{= menu.path }}">{{= menu.name }}</a>
{{ if (menu.submenu && menu.submenu.length > 0) { }}
<ul>
{{ _.each(menu.submenu, function (submenu) { }}
<li><a href="{{= submenu.path }}">{{= submenu.name }}</a></li>
{{ }); }}
</ul>
{{ } }}
</li>
{{ }); }}
</script>
注意:我假设您正在执行以下操作,以告知Underscore使用Mustache样式语法覆盖默认模板设置。我从this answer复制了这些设置。
_.templateSettings = {
evaluate: /\{\{(.+?)\}\}/g,
interpolate: /\{\{=(.+?)\}\}/g,
escape: /\{\{-(.+?)\}\}/g
};