An easy way to use jQuery's autocomplete with Rails 3
Before you start
Make sure your project is using jQuery-ui with the autocomplete widget before you continue.
You can find more info about that here:
I'd recommend you understand what's happening with those 3 tools before attempting to use this gem.
Include the gem on your Gemfile
gem 'rails3-jquery-autocomplete', '>= 0.1.1', :require => 'autocomplete'
Run the generator
rails generate autocomplete
And include autocomplete-rails.js on your layouts
To set up an action on your controller, all you have to do is call it with the object name and the method as in the following example:
class ProductsController < Admin::BaseController autocomplete :brand, :name end
This will magically generate an action autocomplete_brand_name, so, don't forget to add it on your routes file
resources :products do get :autocomplete_brand_name, :on => :collection end
On your view, all you have to do is include the attribute autocomplete on the text field using the url to the autocomplete action as the value. form_for @product do |f| f.text_field :brand_name, :autocomplete => autocomplete_brand_name_products_path end
This will generate an HTML tag that looks like:
<input type="text" autocomplete="products/autocomplete_brand_name">
Now your autocomplete JS code is unobtrusive, Rails 3 style.
And... That's it!