Added the possibility to use scopes with arguments, by passing a array or a lambda via the scopes option and more.

[budu]

This can be really useful in certain situations, there's two ways of using scopes with arguments, by sending an array and with a lambda. Here's an example with the former:

autocomplete :user, :name, :scopes => [[:older_than, 21]]

And for lambdas:

before_filter :find_settings
attr_reader :settings
autocomplete :user, :name, :scopes => [lambda {|users, options| 
  users.older_than options[:controller].settings.minimum_age}]

The lambda way isn't really as nice as I'd like, maybe giving the lambda direct access to the controller environment would be better but I'm not sure how to do that.

Update

I've also added the possibility to use a custom action name and improved the way the extra_data option work by making accept hashes, here's a complete example:

  autocomplete(:user,
               :full_name,
               :full => true,
               :action_name => :autocomplete_primes,
               :scopes => [lambda { |items, options|
                   items.primes_by_course options[:controller].course }],
               :extra_data => {'special_pricings.cost' => lambda { |item, options| item.special_pricings.first.cost }})

Edit: Updated last code example to reflect changes in 1f09e1f.

[softr8]

Thanks for this pull request, it looks really interesting, just one thing, can you add some test coverage? I ran tests and some of them are broken

[budu]

sorry, made those changes in a rush, I'll have a look at the tests!

[budu]

I've fixed the existing tests and added some new unit tests for the json_for_autocomplete method. What's missing is some unit tests for get_autocomplete_items and the integration tests for the new features in this pull request. I'm not quite sure how to approach the later, but I could add the missing unit tests in the coming week.

[budu]

I've made another change that I think would be worthwhile. For the Formtastic custom input, you can now do:

f.input :user_name, :as => :autocomplete, :id_field => :user_id

and it will generate the id field then set the id_element option.

I understand this pull request is starting to get big, that's because I'm lazy, so if you don't like that last feature I could move it to another branch.

[caarlos0]

please merge this.