Ruby on Rails : Delete multiple items by check box

In index.rhtml

<% form_for :items, @items, :url => { :action => 'destroy' } do %>
 <% for item in @items %>
 <%= check_box_tag 'item_ids[]', item.id, false %> <%= item.name %>
 <% end %>
<%= submit_tag 'Delete', :name =>'commit', :value => 'Delete', 
:confirm => 'Are you sure?' %>
<% end %>

In controller

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def index
 @items = Item.find(:all)

 respond_to do |format|
  format.html # index.html.erb
  format.xml  { render :xml => @items }
 end
end

def destroy
 i = 0
 arr_item = Array.new
 @items = Item.find(params[:item_ids])
 @items.each do |item|
  item.destroy 
  arr_item[i] = item.name
  i += 1
 end
 @item_name = arr_item*', '  
 
 redirect_to(items_url)    
 flash[:notice] = @item_name + ' was successfully deleted.'
end

line 13: get check box values
line 15 : delete all items
line 16 : store item's name which already deleted
line 19 : item separate with comma, eg: orchid, rose
line 21 : goto index page after items deleted