Rails - Dec 2005 - Navigation - Link back to a calling controller/action

I''m a newbie to Ruby on Rails and I have what I think is a fairly
simple
question.

I''m developing an application which lists Enterprise Services.  Each 
Service has a User (actually a contact person) which I display with a 
link to the Users show view.

I got this working from the Services List screen as follows:

<td width="25%">
  <%= link_to service.user.userid, { :controller => "users",
:action =>
"show",
      :id => service.user_id, :lastcontroller => "services",
:lastaction
=> "list"
} %> - <%= service.user.firstname %> <%= service.user.lastname %>
</td>

My problem is that I cannot figure out the syntax to get the back link 
on the Users show screen working.

My users_controller.rb has this:
  def show
  	last_controller = @params[''lastcontroller'']
  	last_action = @params[''lastaction'']

    @user = User.find(@params[''id''])
  end

I tried variations of this in my show.rhtml and got errors.
<%= link_to ''Back'', :controller => lastcontroller,
:action => lastaction
%>

Any suggestions would be greatly appreciated.

Thx
nfstern

-- 
Posted via http://www.ruby-forum.com/.

Hey Noah,

Unless you do not really want to use JS, you could use:

<%= link_to ''Back'',
''javascript:history.go(-1)''  %>

HTH,

Deepak

Noah Stern wrote:
> I''m a newbie to Ruby on Rails and I have what I think is a fairly
simple
> question.
> 
> I''m developing an application which lists Enterprise Services. 
Each
> Service has a User (actually a contact person) which I display with a 
> link to the Users show view.
> 
> I got this working from the Services List screen as follows:
> 
> <td width="25%">
>   <%= link_to service.user.userid, { :controller =>
"users", :action =>
> "show",
>       :id => service.user_id, :lastcontroller =>
"services", :lastaction
> => "list"
> } %> - <%= service.user.firstname %> <%= service.user.lastname
%>
> </td>
> 
> My problem is that I cannot figure out the syntax to get the back link 
> on the Users show screen working.
> 
> My users_controller.rb has this:
>   def show
>   	last_controller = @params[''lastcontroller'']
>   	last_action = @params[''lastaction'']
> 
>     @user = User.find(@params[''id''])
>   end
> 
> I tried variations of this in my show.rhtml and got errors.
> <%= link_to ''Back'', :controller => lastcontroller,
:action => lastaction
> %>
> 
> Any suggestions would be greatly appreciated.
> 
> Thx
> nfstern
>

ncdram wrote:
> Hey Noah,
> 
> Unless you do not really want to use JS, you could use:
> 
> <%= link_to ''Back'',
''javascript:history.go(-1)''  %>
> 
> HTH,
> 
> Deepak
Okay thanks Deepak.  I did eventually get it to work using 2 instance 
variables @last_controller & @last_action.  However this only works when 
you go 1 screen back.  If you do this sequence: List Services -> Show 
User -> Edit User, it breaks trying to go back from Edit to Show.  I 
finally decided that if the user wants to go back, they can click on the 
back button on Firefox, so I disabled the back link.

I think your solution probably fixes that and I will try it when I get 
into the office today.

-- 
Posted via http://www.ruby-forum.com/.