How to use sunspot_rails gem to search for related articles

Question

I have a mini blog app and i would like user to view articles that relates to what they are reading in the article show page. without the sunspot_rails gem i would do someth

Answer 1

As RocketR mentions, this is a trivial use case for Sunspot.

First, use Sunspot to specify that you have three fields to be indexed as text.

class Article < ActiveRecord::Base
  searchable do
    text :name
    text :description
    text :notes
  end
end

Then issue a search, likely from within a controller action. The @search object below contains metadata about the search response, including the matching objects under its results method.

@search = Article.search do
  keywords query
end
@results = @search.results

To find other documents that are similar to an object you already have loaded, say in a show action, you can call the more_like_this instance method. This is a special kind of search, which uses Solr's "More Like This" functionality, and which returns a search object similar to the above full-text search. You can use its results method to render the results of that search.

<%= render @article.more_like_this.results %>

The more_like_this method also accepts a block with similar options to the search block, so you can have more control over how you're judging similarity.

Hope that helps!