Laravel 4:如何为嵌套资源编写正确的嵌套控制器? [英] Laravel 4: how to write the correct nested controller for nested resource?

问题描述

在Laravel 4中，我希望创建一组如下所示的静态资源:

In Laravel 4, I wish to create a set of restful resources as follows:

http://localhost/posts/1/comments   
http://localhost/posts/1/comments/1 
http://localhost/posts/1/comments/1/edit

...
因此，我创建了两个控制器: PostsController 和 CommentsController (在同一层上)，路由如下所示:

...
So I created two controllers: PostsController and CommentsController (on the same layer), and the routes are written as below:

Route::resource('posts', 'PostsController');

Route::resource('posts.comments', 'CommentsController');

我还在/views/comments/index.blade.php中创建了一个引用路由的链接:posts.comments.create

I also created a link in /views/comments/index.blade.php referring to routes: posts.comments.create

{{ link_to_route('posts.comments.create', 'Add new comment') }}

这是我遇到的问题:

当我访问http://localhost/posts/1/comments时，页面抛出 MissingMandatoryParametersException ，表明:

When I visit http://localhost/posts/1/comments, the page throws MissingMandatoryParametersException, indicating:

缺少一些必需参数("posts")来生成路线"posts.comments.create"的URL.

如何解决该问题，以及如何知道该解决方案是否也适用于CommentsController中的create和edit方法?

How can I fix the problem, and how can I know whether the solution also applies for the create and edit methods in CommentsController?

例如

 public function index()
{
    $tasks = $this->comment->all();

    return View::make('comments.index', compact('comments'));

}

public function create()
    {
       return View::make('comments.create');

    }

public function show($post_id,$comment_id)  
    {  
        $comment = $this->comment->findOrFail($comment_id);  

        return View::make('comments.show', compact('comment'));  

    }

推荐答案

我在两个项目中使用了嵌套控制器，很喜欢它们.问题似乎出在您的控制器和路由链接中.

I'm using nested controllers in two projects, love them. The problem seems to be in your controller and route link.

在CommentController中，缺少$ post_id.做这样的事情:

In the CommentsController, the $post_id is missing. Do something like this:

public function create($post_id)
{
   return View::make('comments.create')
    ->with('post_id', $post_id);
}

在创建到嵌套控制器的链接时，必须提供所有祖先的ID.在这种情况下，$ post_id再次丢失.如果尚未显示，则可能必须使其可用.

When creating links to a nested controller, the ID's of all of the ancestors must be provided. In this case the $post_id is again missing. You may have to make it available to your view if it's not already.

{{ HTML::linkRoute('posts.comments.create', 'Add new comment', $post_id) }}

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