Backbone.js路由器中的键值对参数处理

Question

我想将键值对作为参数传递给Backbone路由,并希望在调用映射函数之前将其反序列化为javascript对象.

var MyRouter = Backbone.Router.extend({
  routes: {
    "dashboard?:params" : "show_dashboard"
  },
  show_dashboard: function(params){
     console.log(params); 
  }
}); 

当我转到"http://...#dashboard？key1 = val1&key2 = val2"时,应在控制台上打印{key1:"val1",key2:"val2"}.

我目前在每个映射函数中使用jQuery BBQ的$ .deparam方法来获取反序列化的对象.如果我可以扩展路由器并将其定义一次就可以了,因此可以在所有映射函数中作为对象访问params.什么是干净的方式来做到这一点？这有什么陷阱？

非常感谢,

马诺

Answer 1

你应该重新定义_extractParameters函数Backbone.Router.然后将使用第一个参数作为params对象调用所有路由器函数.

// Backbone Router with a custom parameter extractor
var Router = Backbone.Router.extend({
    routes: {
        'dashboard/:country/:city/?:params': 'whereAmIActually',
        'dashboard/?:params': 'whereAmI'
    },
    whereAmIActually: function(params, country, city){
        console.log('whereAmIActually');
        console.log(arguments);
    },
    whereAmI: function(params){
        console.log('whereAmI');
        console.log(arguments);
    },
    _extractParameters: function(route, fragment) {
        var result = route.exec(fragment).slice(1);
        result.unshift(deparam(result[result.length-1]));
        return result.slice(0,-1);
    }
});

// simplified $.deparam analog
var deparam = function(paramString){
    var result = {};
    if( ! paramString){
        return result;
    }
    $.each(paramString.split('&'), function(index, value){
        if(value){
            var param = value.split('=');
            result[param[0]] = param[1];
        }
    });
    return result;
};

var router = new Router;
Backbone.history.start();

// this call assumes that the url has been changed
Backbone.history.loadUrl('dashboard/?planet=earth&system=solar');
Backbone.history.loadUrl('dashboard/usa/la/?planet=earth&system=solar');

工作演示就在这里.