module ActionController # Macros are class-level calls that add pre-defined actions to the controller based on the parameters passed in. # Currently, they're used to bridge the JavaScript macros, like autocompletion and in-place editing, with the controller # backing. module Macros module AutoComplete #:nodoc: def self.included(base) #:nodoc: base.extend(ClassMethods) end # DEPRECATION WARNING: This method will become a separate plugin when Rails 2.0 ships. # # Example: # # # Controller # class BlogController < ApplicationController # auto_complete_for :post, :title # end # # # View # <%= text_field_with_auto_complete :post, title %> # # By default, auto_complete_for limits the results to 10 entries, # and sorts by the given field. # # auto_complete_for takes a third parameter, an options hash to # the find method used to search for the records: # # auto_complete_for :post, :title, :limit => 15, :order => 'created_at DESC' # # For help on defining text input fields with autocompletion, # see ActionView::Helpers::JavaScriptHelper. # # For more examples, see script.aculo.us: # * http://script.aculo.us/demos/ajax/autocompleter # * http://script.aculo.us/demos/ajax/autocompleter_customized module ClassMethods def auto_complete_for(object, method, options = {}) define_method("auto_complete_for_#{object}_#{method}") do find_options = { :conditions => [ "LOWER(#{method}) LIKE ?", '%' + params[object][method].downcase + '%' ], :order => "#{method} ASC", :limit => 10 }.merge!(options) @items = object.to_s.camelize.constantize.find(:all, find_options) render :inline => "<%= auto_complete_result @items, '#{method}' %>" end end end end end end