Rails 2.0 and link_to_remote :with
I’m moving an old app to Rails 2.0 and other than fixing some routes Ajax calls with link_to_remote and the :with parameter was the only thing that gave me some trouble. In the old version I was grabbing the current value of a drop down list with Prototype and passing it along using :with like this
<%= link_to_remote image_tag('cms/add_16.gif', :id => "color_add"),
:url => { :controller => "colors", :action => "new_ajax",
:id => @product.id },
:with => "{ color_id: $F('color_id') }"
%>
But in Rails 2.0 the parameter wouldn’t go along for the ride, it seemed that the new authenticity_token that gets sent with Ajax calls was messing things up. Here’s the fix
<%= link_to_remote image_tag('cms/add_16.gif', :id => "color_add"),
:url => { :controller => "colors", :action => "new_ajax",
:id => @product.id },
:with => "'color_id='+$F('color_id')"
%>
I freely admit JavaScript/Ajax is my weakest language so if I was doing it wrong the entire time let me know 
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Alastair, posted on
January 18, 2008 at 11:22 am, filed under
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3 Comments
thanks! I am new to rails in general and had no clue how to attach a dom node value to my ajax requests. This is kind of a cornerstone of what I like to do.
Now I know!
that’s work for me! thanks!
“0″, :align=>”absmiddle”), :update => “resultado”, :url => { :action => “actualiza_lineas” }, :with => “{ filtro_lineas: $F(’filtro_lineas’) }” %>
a question… what’s global var $F ?? the form id, name or so??
$F is a protoype helper function to query the value of the form-input element given as id in the parameters of the $F function.