Rails - Jul 2012 - Routing&Engines: fallback on hosting-routes, non-prefixed links?

I''m currently trying to convert an existing non-engine-plugin (for
redmine)
into an engine: Here I ran into some routing issues: a controller in the 
plugin uses a layout from the hosting application, the hosting application 
now tries to render links inside this layout within the context of the 
plugin''s controller, which fails, as the plugin does not define them,
only
the hosting application does. 

the edgeguide on routes(
http://edgeguides.rubyonrails.org/engines.html#routes) says, qualifying the 
main.app will solve this issue:

<pre>
link_to "Home", main_app.root_path 
</pre>

however, I cannot/do not want to rewrite *all* the links in the hosting 
application: Is there a way to have rails fall back on the links of the 
hosting-application, when a route is not found in the plugin? 

A somewhat similar problem happens, when I use link_to with an url like: 

<pre>
link_to "My Account", {:controller => "my",:action =>
:account}
</pre>

which works fine, when called from the hosting-application(as the 
my-controller exists there, but get''s prefixed with the
plugin''s namespace,
when it is called from within a controller inside the plugin, which gives 
a: 

<pre> 
ActionController::RoutingError (No route matches 
{:controller=>"redmine_config/my",
:action=>"account"}):
</pre>

as the plugin does not define the my-controller.

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figured it out: the solution here is to 

   - remove the isolate_namespace from the engine: this allows access to 
   the routes/route-helpers of the hosting app.
   - do not namespace the controller(app/my_controller instead of 
   app/my_plugin/my_controller) you are calling the layout from: otherwise, 
   this namespace gets prefixed


Am Dienstag, 10. Juli 2012 08:19:52 UTC+2 schrieb
vierund...-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org:
>
> I''m currently trying to convert an existing non-engine-plugin (for
> redmine) into an engine: Here I ran into some routing issues: a controller 
> in the plugin uses a layout from the hosting application, the hosting 
> application now tries to render links inside this layout within the context
> of the plugin''s controller, which fails, as the plugin does not
define
> them, only the hosting application does. 
>
> the edgeguide on routes(
> http://edgeguides.rubyonrails.org/engines.html#routes) says, qualifying 
> the main.app will solve this issue:
>
> <pre>
> link_to "Home", main_app.root_path 
> </pre>
>
> however, I cannot/do not want to rewrite *all* the links in the hosting 
> application: Is there a way to have rails fall back on the links of the 
> hosting-application, when a route is not found in the plugin? 
>
> A somewhat similar problem happens, when I use link_to with an url like: 
>
> <pre>
> link_to "My Account", {:controller => "my",:action
=> :account}
> </pre>
>
> which works fine, when called from the hosting-application(as the 
> my-controller exists there, but get''s prefixed with the
plugin''s namespace,
> when it is called from within a controller inside the plugin, which gives 
> a: 
>
> <pre> 
> ActionController::RoutingError (No route matches 
> {:controller=>"redmine_config/my",
:action=>"account"}):
> </pre>
>
> as the plugin does not define the my-controller.
>
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