PgSearchMultipleHighlight

The pg_search_multiple_highlight gem extends the functionality of the popular pg_search gem to overcome its limitation when performing searches against multiple columns and attempting to highlight results. The core issue arises when using the :highlight option within the :tsearch scope on multiple columns.

This gem addresses this limitation by introducing the :multiple_highlight option, offering a comprehensive solution for highlighting results across multiple columns.

To install the gem run the following command in the terminal:

$ bundle add pg_search_multiple_highlight

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install pg_search_multiple_highlight

To extend functionality of the pg_search gem, require the gemfile in the same file, where a PgSearch module is included:

require 'pg_search_multiple_highlight'

class Shape < ActiveRecord::Base
  include PgSearch::Model
end

Usage of the :multiple_highlight is similar to the standard :highlight.

Adding .with_pg_search_multiple_highlight after the pg_search_scope you can access pg_multiple_highlight attribute for each object.

require 'pg_search_multiple_highlight'

class Article < ActiveRecord::Base
  include PgSearch::Model

  pg_search_scope :search,
                  against: { title: 'A', description: 'B' },
                  using: {
                    tsearch: {
                      multiple_highlight: {
                        StartSel: '<b>',
                        StopSel: '</b>',
                        MaxWords: 400,
                        MinWords: 200,
                        ShortWord: 4,
                        HighlightAll: true,
                        MaxFragments: 3,
                        FragmentDelimiter: '&hellip;'
                      }
                    }
                  }
end

Article.create!(:title => "Quick brown fox", :description => "The quick brown fox jumps over the lazy dog.")

first_match = Article.search("brown").with_pg_search_multiple_highlight.first
first_match.pg_search_multiple_highlight
# => {:id=>1,
#     :title=>"Quick <b>brown</b> fox",
#     :description=>"The quick <b>brown</b> fox jumps over the lazy dog."}

Bug reports and pull requests are welcome at https://github.com/msuliq/pg_search_multiple_highlight.

The best way to contribute would be to fork this repo, create a new branch from main, to merge the branch into main of the fork once the new code is in place and then open a pull request to merge forked main into the main of the present repo.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the PgSearchMultipleHighlight project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.