From: Gregor Panek <nerd@...>
Date: 2010-05-19T21:03:18+09:00
Subject: Re: passing values from partial to controller

yeah that's because you pass only one parameter to the hidden_field_tag so you got this:
<input id="tags_list" name="tags_list" type="hidden" />

and your value is still nil, so you have to pass a second parameter to the hidden_field_tag to set the value:

 <%=hidden_field_tag :group_name, "yourgroupname"%>
then you got this in html

<input id="token" name="token" type="hidden" value="yourgroupname" />
now you should get with params[:group_name] the value that you set 

hope this works :) 


> Gregor Panek wrote:
>> Hi,
>> 
>> I think your problem is this line:
>> @g=Group.find_by_group_name(params[:group_name]).id
>> 
>> you want to pass the params :group_name which are nil because in your 
>> form you don't pass the :group_name to your controller:
>> 
>> <% form_tag (:controller => "users" , :action => "addfriendtogroups")
>> do %>
>> 
>>       Add friend:
>>        <%= text_field_with_auto_complete :user, 'login', {:size =>
>> 20}, {:tokens => ','} %>
>> 
>>           <%= submit_tag "Add to group", :class =>
>> "submit_input_button rounded_corner" %>
>> <% end %>
>> 
>> So pass your :group_name trough a hidden field to your controller
>> 
>> hidden_field
>> 
>> 
>> Am 19.05.2010 um 13:07 schrieb Ravi Dtv:
> 
> 
> 
> 
> I tried with a hidden field
> <% form_tag (:controller => "users" , :action => "addfriendtogroups") do 
> %>
> 
>    Add friend:
>       <%= text_field_with_auto_complete :user, 'login', {:size => 20}, 
> {:tokens => ','} %>
>    <%= hidden_field_tag :group_name %>
>            <%= submit_tag "Add to group", :class => 
> "submit_input_button rounded_corner" %>
> <% end %>
> 
> but it still  a nil value.
> 
> The error :
> 
> 
> 
> RuntimeError in UsersController#addfriendtogroups
> 
> Called id for nil, which would mistakenly be 4 -- if you really wanted 
> the id of nil, use object_id
> 
> 
> Request
> 
> Parameters:
> 
> {"group_name"=>"",
> "commit"=>"Add to group",
> "authenticity_token"=>"MHB8Ys8vccsGwbgnsb9r5T68oqirPpW6YUscfDojZhY=",
> "id"=>"testing",
> "user"=>{"login"=>"santosh"}}
> 
> where 'testing' is current user login, santosh is friend, and my 
> group_name is passing null value.
> 
> -- 
> Posted via http://www.ruby-forum.com/.
>