Rails spinoffs - Jul 2007 - Removing One Element From a Serialized Form

Hi all,

I''m trying to serialize a form with the exception of one specific
element.

Serializing the form in a hash (without pulling out specific elements)
works:

<li>
   <%= link_to_remote ''(Save)'', {:url =>
post_path(@post), :with => "$
(''post_form'').serialize(true)" }, :method => :put
%>
</li>

The generated code is:

<li><a href="#" method="put" onclick="new
Ajax.Request(''/posts/1'',
{asynchronous:true, evalScripts:true, parameters:$
(''post_form'').serialize(true)}); return
false;">(Save)</a></li>

Ajax request goes through (a post (with the put method appended) is
sent to /posts/1) and the update.rjs file is called. Life is good so
far.

In the development log this is shown (removed Session ID for brevity):

Processing PostsController#update (for 127.0.0.1 at 2007-07-03
18:53:46) [PUT]
   Parameters: {"commit"=>"Publish",
"post"=>{"title"=>"asdfasdfadfaf",
"body"=>"afdasdf", "tag_list"=>"",
"teaser"=>"adsfadf"},
"_method"=>"put",
"action"=>"update", "id"=>"1",
"controller"=>"posts"}

Attempting to remove a key from the serialized hash blows everything
up.

Here is the code that I tried to use to remove a key:

<li><%= link_to_remote ''(Save)'', { :url =>
post_path(@post),
            :with => "$H($
(''post_form'').serialize(true)).remove(''post[tag_list]'')"
}, :method
=> :put %>
        </li>

The generated code is:

<li><a href="#" method="put" onclick="new
Ajax.Request(''/posts/173'',
{asynchronous:true, evalScripts:true, parameters:$H($
(''post_form'').serialize(true)).remove(''post[tag_list]'')});
return
false;">(Save)</a>

When this happens, there is a POST sent but to the wrong URL (and I
get a 404). This appears in the logs (again Session removed for
brevity):

Processing PostsController#1 (for 127.0.0.1 at 2007-07-03 18:52:38)
[POST]
   Parameters: {"action"=>"1",
"controller"=>"posts"}

ActionController::UnknownAction (No action responded to 1):

It looks like perhaps when I call $H and the remove method it whacks
the entire hash.

Am I calling the wrong method, if so how can I remove one key during
serialization? Am I doing things the hard way?

Any help would be appreciated.

Thanks,

Carlos


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