acts_as_searchable
is one of the most useful plugins which's enabling us to add a fulltext search feature to our models/resources easily.

Unfortunately, it is lacking an interface to the features of searching by similarity provided by
HyperEstraier.

So I wrote some codes to add an interface to exploit it.
This is
acts_as_searchable_with_similarity.

How to use?

Here is an example.

app/models/article.rb

rails>>
class Article < ActiveRecord::Base
acts_as_searchable
end

Article.similarity_search(target_article, :limit => 5)
<<--