重定向到某条路根据病情 [英] Redirecting to a certain route based on condition

问题描述

我正在写一个小AngularJS应用程序，有一个登录视图和主视图，设置像这样：

I'm writing a small AngularJS app that has a login view and a main view, configured like so:

$routeProvider
 .when('/main' , {templateUrl: 'partials/main.html',  controller: MainController})
 .when('/login', {templateUrl: 'partials/login.html', controller: LoginController})
 .otherwise({redirectTo: '/login'});

我的LoginController检查用户名/密码组合，并设置这反映在$ rootScope一个属性：

My LoginController checks the user/pass combination and sets a property on the $rootScope reflecting this:

function LoginController($scope, $location, $rootScope) {
 $scope.attemptLogin = function() {
   if ( $scope.username == $scope.password ) { // test
        $rootScope.loggedUser = $scope.username;
        $location.path( "/main" );
    } else {
        $scope.loginError = "Invalid user/pass.";
    }
}

一切正常，但如果我访问的http：//本地主机/＃/主我最终绕过登录屏幕。我想写的东西，如每当路由变化，如果$ rootScope.loggedUser为null，则重定向到/登录

Everything works, but if I access http://localhost/#/main I end up bypassing the login screen. I wanted to write something like "whenever the route changes, if $rootScope.loggedUser is null then redirect to /login"

...

...等。我可以听路由变化不知何故？无论如何，我会发布这个问题，并继续寻找。

... wait. Can I listen to route changes somehow? I'll post this question anyway and keep looking.

推荐答案

通过一些文档和源$ C ​​$ C一些跳水之后，我觉得我得到它的工作。或许，这将是为别人有用吗？

After some diving through some documentation and source code, I think I got it working. Perhaps this will be useful for someone else?

我添加以下到我的模块配置：

I added the following to my module configuration:

angular.module(...)
 .config( ['$routeProvider', function($routeProvider) {...}] )
 .run( function($rootScope, $location) {

    // register listener to watch route changes
    $rootScope.$on( "$routeChangeStart", function(event, next, current) {
      if ( $rootScope.loggedUser == null ) {
        // no logged user, we should be going to #login
        if ( next.templateUrl == "partials/login.html" ) {
          // already going to #login, no redirect needed
        } else {
          // not going to #login, we should redirect now
          $location.path( "/login" );
        }
      }         
    });
 })

有一件事似乎奇怪的是，我不得不测试部分名称（的login.html ），因为下一个Route对象没有一个网址或某事其他。也许有更好的方法？

The one thing that seems odd is that I had to test the partial name (login.html) because the "next" Route object did not have a url or something else. Maybe there's a better way?

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