You don't want to have white space between method name and brackets so 
either

<%= link_to "some text", "/factory/demo/message/1389/" %>

<%= link_to("some text", "/factory/demo/message/1389/") %>




On Thursday, September 18, 2014 11:04:54 PM UTC+2, Paolo Di Pietro wrote:
>
> Done!
>
> Then I put 
> <%= link_to "some text", /factory/demo/message/1389/ %>
> in my .erb file
>
> but getting the following error:
>
> Completed 500 Internal Server Error in 56ms
>
> SyntaxError 
> (/home/pdipietro/gsn/app/views/identity_providers/index.html.erb:35: syntax 
> error, unexpected ',', expecting ')'
> ....append=( link_to ("some text", /factory/demo/message/1389) ...
> ...                               ^
> /home/pdipietro/gsn/app/views/identity_providers/index.html.erb:35: syntax 
> error, unexpected ')', expecting keyword_end
> ..., /factory/demo/message/1389) );@output_buffer.safe_append='
> ...                               ^):
>   app/views/identity_providers/index.html.erb:35: syntax error, unexpected 
> ',', expecting ')'
>   app/views/identity_providers/index.html.erb:35: syntax error, unexpected 
> ')', expecting keyword_end
>
> I tried a lot of variants with no success!
>
> Any idea?
>
> Il giorno giovedì 18 settembre 2014 22:28:53 UTC+2, Jarmo Isotalo ha 
> scritto:
>>
>> Im not sure if I get what exactly you are trying to accomplish, but:
>>
>> with route
>>
>> get ':part1/(:part2/(:part3))' =>'demo#demo'
>>
>> And controller
>> class DemoController < ApplicationController
>>   def demo
>>     render plain: params.inspect
>>   end
>> end
>>  
>> And thus /foo, /foo/bar and /foo/bar/baz will use DemoController#demo 
>> and :part1 :part2 and :part3 can be accessed from params hash
>>
>>
>>
>>
>>
>> # And just a snippet from 
>> http://guides.rubyonrails.org/routing.html#bound-parameters
>> 3.1 Bound Parameters
>>
>> When you set up a regular route, you supply a series of symbols that 
>> Rails maps to parts of an incoming HTTP request. Two of these symbols are 
>> special: :controller maps to the name of a controller in your 
>> application, and :action maps to the name of an action within that 
>> controller. For example, consider this route:
>> get ':controller(/:action(/:id))'
>>
>> If an incoming request of /photos/show/1 is processed by this route 
>> (because it hasn't matched any previous route in the file), then the result 
>> will be to invoke the show action of the PhotosController, and to make 
>> the final parameter "1" available as params[:id]. This route will also 
>> route the incoming request of /photos to PhotosController#index, since 
>> :actionand :id are optional parameters, denoted by parentheses.
>>
>>
>> On Thursday, September 18, 2014 10:02:27 PM UTC+2, Paolo Di Pietro wrote:
>>>
>>> No, I still cannot do it. 
>>>
>>> I cannot use Hobo because I'm using Neo4j NoSql db, which doesn't run 
>>> with Hobo.
>>>
>>> I just would like to set up an abstract route redirecting everything to 
>>> my AbstractController! 
>>>
>>> Il giorno martedì 16 settembre 2014 10:37:11 UTC+2, Jarmo Isotalo ha 
>>> scritto:
>>>>
>>>> Cant you do it already?
>>>>
>>>> On Monday, September 15, 2014 6:34:46 PM UTC+2, Paolo Di Pietro wrote:
>>>>>
>>>>> Hi all,
>>>>>
>>>>> I'd like to implement (Rails 4)  a very high level (generic) abstract 
>>>>> controller, able to manage any route and then create a viewer on the fly.
>>>>>
>>>>> I'd like to call it 'abstracts', and being able to call as
>>>>>
>>>>> :abstract(/:subject(/:action(/:id)))
>>>>>
>>>>> something like 
>>>>>
>>>>> abstract/user/create 
>>>>> or 
>>>>> abstract/identity/:john/edit
>>>>>
>>>>> I'm not sure on the best way to define the correct route, and how to 
>>>>> generate the model and the view code on the fly, after getting the 
>>>>> definition in the controller from the DB.
>>>>>
>>>>> Any suggestion is appreciated.
>>>>>
>>>>> Paolo
>>>>>
>>>>

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