[Rails] Ajax request

Hi

I'm trying to create an Ajax request that displays a list of inventory
items resulting from a search on a keyword. How can I insert the list
of inventory items using a partial or a string of html onto the page
following the ajax request? The following doesn't work because I
can't use a content_tag helper method in a controller.

I guess another question would be why doesn't the inventories div
update and show the inventory items after the ajax request?

I have this in my controller (this uses a string of html)

def find_by_keyword
@inventories = Inventory.find(:all, :conditions => ['inventory_id
LIKE ?', params[:inventory][:keyword]])
@inventories_list = @inventories.map { |inventory|
content_tag("li", inventory['id'])}
render :inline => @inventories_list
end

And this in the view:

<% form_remote_tag :url => { :controller =>
"purchase_orders", :action => "find_by_keyword" }, :update=>
"inventories" do |f| -%>
<%= model_auto_completer('inventory[keyword]', '',
'inventory[inventory_id]', '', {:method => :get})%>
<%= submit_tag "Find!" %>
<% end %>

<div id = "inventories">
<% if !@inventories.nil?%>
<% for inventory in @inventories %>
<% link_to inventory['id'], :controller =>
"purchase_orders", :action => "new", :inventory_id => inventory['id']
%>
<% end %>
<% end %>
</div>

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