如何设置部分嵌套的资源路由？
在我的 Rails 网站上，用户发布他们想要出售的商品的 Listing。其他用户可以浏览这些列表并单击链接联系卖家，这将创建一个 MessageThread：
# MessageThread properties...
listing_id
poster_id # (listing_id's owner.. this is a shortcut for to avoid joins on the database)
sender_id
body # (text of message)
MessageThreads 绝不会在 Listing 的上下文之外创建code>，所以我嵌套了他们足智多谋的路线。但是，它们在创建后不需要查看/编辑 Listing 上下文。只有 new 和 create 才需要它。行动。我是这样设置的：
resources :message_threads, :only => [:show, :destroy]
resources :listings do
resources :message_threads, :only => [:new, :create]
end
我似乎无法弄清楚 MessageThreadsController 的 new 操作视图中的 form_for 语法...我做了 form_for @message_thread 但这不起作用。这是设置该对象的正确方法吗？我应该避免使用资源丰富的路由，还是可以将列表 ID 作为 URL 中的参数传递，而不是嵌套路由？或者总是引用列表下方的message_thread？
On my Rails site, users post Listings of items they want to sell. Other users can browse these listings and click a link to contact the seller, which should create a MessageThread:
# MessageThread properties...
listing_id
poster_id # (listing_id's owner.. this is a shortcut for to avoid joins on the database)
sender_id
body # (text of message)
MessageThreads are never created outside the context of a Listing, so I nested their resourceful routes. However, they don't need the Listing context to be viewed/edited after they are created.. it's only necessary for the new and create actions. I set it up like this:
resources :message_threads, :only => [:show, :destroy]
resources :listings do
resources :message_threads, :only => [:new, :create]
end
I can't seem to figure out the form_for syntax in the new action view for the MessageThreadsController... I do form_for @message_thread but that isn't working. Is this the right way to set this object up? Should I avoid using resourceful routes, or maybe pass the listing ID as a parameter in the URL, instead of nesting the routes? Or always reference the message_thread underneath a listing?
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这应该有效：
您始终可以在命令行中运行它
新链接将是
This should work:
You can always run this in the command line
The new link would be