Rails - Dec 2005 - passing parameters to link_to OR better way to do this?

Hi All:

I''m writing my 1st Rails app and I can''t seem to find the
answer on
the web or in the book.

I''m making a table, and I want to be able to expand a filename.  The
code is basically as as follows below.  In the last <td> entry, I want
to call an action and pass in the test_results_path, which I will go
and read a file and munge the data for a separate presentation.  The
code below shows me trying a variation of something I found, but I''m
unable to get any parameters through to the action.:

rhtml
=====
      <% @logs.each do |log| %>
      <tr>
    <td><%= log.base_name %></td>
    <td><%= log.date_time %></td>
    <td><%= log.status %></td>
    <td><%= log.test_run_path %></td>
    <td><%= link_to log.test_results_path, :action =>
"show_results",
:id => o, :params => { :result_file => log.test_results_path} %>
</td>
      </tr>
      <% end %>
=====
code:
===
def show_results
# get the results file and do some munging
end

Is there a way to pass parameters to the link_to(), OR is there some
better way to do this in general that''s more Rails like?

 Thanks

Forrest

Have a look at the API doc for link_to [1]. The second parameter to
link_to is a hash of all parameters you want to send with the request.
So the following should do what you want:

link_to log.test_results_path, :action => "show_results", :id =>
o,
:result_file => log.test_results_path

As an aside, its probably a bad idea to include a filesystem path as a
request parameter.

cheers,
Gerret

[1] http://api.rubyonrails.com/classes/ActionView/Helpers/UrlHelper.html#M000332


On 12/15/05, Forrest Chang
<fkchang2000-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hi All:
>
> I''m writing my 1st Rails app and I can''t seem to find the
answer on
> the web or in the book.
>
> I''m making a table, and I want to be able to expand a filename. 
The
> code is basically as as follows below.  In the last <td> entry, I
want
> to call an action and pass in the test_results_path, which I will go
> and read a file and munge the data for a separate presentation.  The
> code below shows me trying a variation of something I found, but
I''m
> unable to get any parameters through to the action.:
>
> rhtml
> =====>
>       <% @logs.each do |log| %>
>       <tr>
>     <td><%= log.base_name %></td>
>     <td><%= log.date_time %></td>
>     <td><%= log.status %></td>
>     <td><%= log.test_run_path %></td>
>     <td><%= link_to log.test_results_path, :action =>
"show_results",
> :id => o, :params => { :result_file => log.test_results_path}
%> </td>
>       </tr>
>       <% end %>
> =====>
> code:
> ===>
> def show_results
> # get the results file and do some munging
> end
>
> Is there a way to pass parameters to the link_to(), OR is there some
> better way to do this in general that''s more Rails like?
>
>  Thanks
>
> Forrest
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

why not just do:

link_to log.test_results_path, :controller => "log", :action =>
"show_results", :id => log

class LogController < ApplicationController
  def show_results
    log = Log.find(params[:id])
    if File.exist?(log.test_results_path)
      # do what you have to do to the file here
    end
  end
end

or am i missing something?

On 12/15/05, Gerret Apelt
<gerret.apelt-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
> Have a look at the API doc for link_to [1]. The second parameter to
> link_to is a hash of all parameters you want to send with the request.
> So the following should do what you want:
>
> link_to log.test_results_path, :action => "show_results", :id
=> o,
> :result_file => log.test_results_path
>
> As an aside, its probably a bad idea to include a filesystem path as a
> request parameter.
>
> cheers,
> Gerret
>
> [1]
>
http://api.rubyonrails.com/classes/ActionView/Helpers/UrlHelper.html#M000332
>
>
> On 12/15/05, Forrest Chang
<fkchang2000-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > Hi All:
> >
> > I''m writing my 1st Rails app and I can''t seem to
find the answer on
> > the web or in the book.
> >
> > I''m making a table, and I want to be able to expand a
filename.  The
> > code is basically as as follows below.  In the last <td> entry,
I want
> > to call an action and pass in the test_results_path, which I will go
> > and read a file and munge the data for a separate presentation.  The
> > code below shows me trying a variation of something I found, but
I''m
> > unable to get any parameters through to the action.:
> >
> > rhtml
> > =====> >
> >       <% @logs.each do |log| %>
> >       <tr>
> >     <td><%= log.base_name %></td>
> >     <td><%= log.date_time %></td>
> >     <td><%= log.status %></td>
> >     <td><%= log.test_run_path %></td>
> >     <td><%= link_to log.test_results_path, :action =>
"show_results",
> > :id => o, :params => { :result_file => log.test_results_path}
%> </td>
> >       </tr>
> >       <% end %>
> > =====> >
> > code:
> > ===> >
> > def show_results
> > # get the results file and do some munging
> > end
> >
> > Is there a way to pass parameters to the link_to(), OR is there some
> > better way to do this in general that''s more Rails like?
> >
> >  Thanks
> >
> > Forrest
> > _______________________________________________
> > Rails mailing list
> > Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

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On 12/15/05, Gerret Apelt
<gerret.apelt-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Have a look at the API doc for link_to [1]. The second parameter to
> link_to is a hash of all parameters you want to send with the request.
> So the following should do what you want:
>
> link_to log.test_results_path, :action => "show_results", :id
=> o,
> :result_file => log.test_results_path
>
  I swear that''s what I have in my .rhtml, but params[:result_file] or
params[:id] aren''t defined.  Am I missing something?

Thanks

Forrest

>  I swear that''s what I have in my .rhtml, but params[:result_file]
or
> params[:id] aren''t defined.  Am I missing something?
>
OOPS sorry, it''s exactly what I had in a one of my attempts, but not
in this one.  I''ll muck around some more and see.   I''m
printing out
the value of params, and no matter what I pass to to link_to, I don''t
see any other values in params.

Thanks

Forrest

Forrest,

You can pass parameters by adding them in the hash, like
'':aparam'' below
:

      <%= link_to "some action",
                {:controller => ''foos'', :action => :new,
:aparam =>
avalue }  %>

Alain

Note: I wrote ''foos'' because :foos is not accepted (A bug).

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

Thanks all.

I don''t know what mind altering substances I was under the influence
wednesday, I swear I was doing what was suggested, but tried again fresh
today and it worked.

Forrest

On 12/15/05, Alain Ravet
<alainravet-spam2004-/E1597aS9LQAvxtiuMwx3w@public.gmane.org>
wrote:
>
> Forrest,
>
> You can pass parameters by adding them in the hash, like
'':aparam'' below
> :
>
>       <%= link_to "some action",
>                 {:controller => ''foos'', :action =>
:new, :aparam =>
> avalue }  %>
>
> Alain
>
> Note: I wrote ''foos'' because :foos is not accepted (A
bug).
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

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