I've also tried
<%= form_for @thread, :as => :thread %>
and this results in the error:
undefined method `forum_threads_path' for
#<#<Class:0x00000103a45098>:0x000001039575a0>
That would seem to be a bug to me. Shouldn't form_for be using :as => :thread
to name that route appropriately?
-M
On May 23, 2010, at 2:52 AM, Michael Jurewitz wrote:
> Hi guys,
>
> I'm having trouble getting named routes and form_for to play nicely in quite
> the way I would expect. Here's a quick summary of what I've got going on:
>
> Named route:
> resources :thread, :class_name => "forum_thread"
>
> Controller name:
> forum_thread_controller
>
> Model object:
> forum_thread
>
>
> In both my new and edit actions I'm setting up an @thread variable:
> @thread = ForumThread.new
>
> 1.) My first attempt at writing the form_for looked something like this:
>
> <%= form_for @thread do |f| %>
> .....
> <% end>
>
> This didn't work because @thread tries to use a path involving the string
> "forum_thread", which doesn't have a matching route and which I don't want.
>
>
> 2.) So that's fine, I figured I'd just use named routes. So I tried this:
>
> <%= form_for @thread, :as => :thread, :url => thread_path(@thread) do |f| %>
> ....
> <% end >
>
> This works for edit actions, but not for new actions. On new I get the
> following error:
>
> No route matches {:action=>"destroy", :controller=>"forum_thread",
> :id=>#<ForumThread id: nil, .....>}
>
>
> 3.) So then I tried:
>
> <%= form_for @thread, :as => :thread, :url => threads_path(@thread) do |f| %>
> ....
> <% end >
>
> This doesn't work for edit, and sorta works for new except it outputs the
> following HTML, which makes the respond_to block unhappy:
>
> <form action="/thread?format=" class="thread_new" id="thread_new"
> method="post">....
>
>
> 4.) So then I tried:
>
> <%= form_for @thread, :as => :thread, :url => threads_path do |f| %>
> ....
> <% end >
>
> Now everything works for new, but not for edit! (Because the ID of the
> element being edited isn't emitted as part of the action):
>
> <form action="/thread" class="thread_edit" id="thread_edit" method="post">
>
>
> So:
> 1. Is there some way to use a named route that uses a custom class name and
> still be able to reuse my form partial for both new and edit actions? Or am
> I stuck writing two forms?
> 2. Is the error I received in #2 a bug in Rails 3 or expected behavior?
> 3. Is the erroneous output in #3 a bug in Rails 3 or expected behavior?
>
>
> My sincere thanks in advance for your help!
>
> -Jury
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