Rails - Nov 2006 - undefined method `stringify_keys!' for "4":String - Meaning of this?

Hi, I have the following on a view

<% for evaluation in @evaluations %>
	    <td><%=h evaluation[0].name %></td>
	    <td><%=evaluation[1].object_id %></td>
	   <td><%= link_to( "Start", :action
=>''evaluatie'', :id =>
evaluation[1].object_id) %></td>
<%end%>

When I click on the link, I can see that I do get a   Parameters:
{"id"=>"4"}    request.

In my controller I just have

def evaluatie
idee = Evaluation.new(params[:id])
@ideename= idee.name
end

For some reason, I get the message   "undefined method
`stringify_keys!'' for "4":String"
Can anyone explains what that means? It is the first time I encounter
this. 
Many thanks for any reply.


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On Nov 20, 2006, at 4:36 PM, Rudy wrote:
> Hi, I have the following on a view
>
> <% for evaluation in @evaluations %>
> 	    <td><%=h evaluation[0].name %></td>
> 	    <td><%=evaluation[1].object_id %></td>
> 	   <td><%= link_to( "Start", :action
=>''evaluatie'', :id =>
> evaluation[1].object_id) %></td>
> <%end%>
>
> When I click on the link, I can see that I do get a   Parameters:
> {"id"=>"4"}    request.
>
> In my controller I just have
>
> def evaluatie
> idee = Evaluation.new(params[:id])
> @ideename= idee.name
> end
>
> For some reason, I get the message   "undefined method
> `stringify_keys!'' for "4":String"
> Can anyone explains what that means? It is the first time I encounter
> this.
> Many thanks for any reply.
If you''re using ActiveRecord, then you probably meant to use .id  
rather than .object_id (and the fact that nil.object_id == 4 is  
pointing toward another error).

Evaluation.new expects to have an attribute hash and your params[:id]  
is just "4" which is the object_id of nil meaning evaluation[1] is  
nil and evaluation is coming from the Enumerable @evaluations.  Using  
[1] on it appears to indicate that it is an Array or some other type  
that provides an array-like accessor using the [] method.

I suspect that you could use a good, basic tutorial (or a book) on  
Rails.  I''m sure Google will help with that search.

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob-xa9cJyRlE0mWcWVYNo9pwxS2lgjeYSpx@public.gmane.org




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