From: Mike Fletcher <lemurific+rforum@...>
Date: 2005-12-06T04:16:54+09:00
Subject: Re: a todo list

jeff.darklight wrote:
> When used in link_to statement within rails the :id => item syntax 
> simply
> assigns the unique id of the record to a hidden form element under the 
> name
> "id" .

Right.  And it's smart enough to not just blindly call id on what's 
passed (I thought would, but I just actually tried it and I'm wrong) to 
get that unique value.  My mention of the deprecation warning was a red 
herring.

> 
> So, I hope that helps provide context.  The above code ( and/or the code
> from my previous posting ) has/have absolutely NOTHING to do with ruby's
> object#id.

However the original code:

> <%= link_to("Edit", :action => "edit", :id => @tasklists.id) %>

*is* calling Object#id via an Array instance rather than letting AR do 
it's magic.  That's why there's a value for id, and also why it's a 
useless value.  Had he done ":id => @tasklists" instead there wouldn't 
have been an id value on the end (pointing at ".../tasklist/edit/" 
instead of ".../tasklist/edit/29134536" like it did) and he would have 
had a different problem (depending on how his edit action handles a 
missing id as opposed to an invalid one).

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