pg_search

https://github.com/casecommons/pg_search

Ruby

pg_search builds ActiveRecord named scopes that take advantage of PostgreSQL’s full text search

PgSearch::Features::TSearch#normalization

From http://www.postgresql.org/docs/8.3/static/textsearch-controls.html
  0 (the default) ignores the document length
  1 divides the rank by 1 + the logarithm of the document length
  2 divides the rank by the document length
  4 divides the rank by the mean harmonic distance between extents (this is implemented only by ts_rank_cd)
  8 divides the rank by the number of unique words in document
  16 divides the rank by 1 + the logarithm of the number of unique words in document
  32 divides the rank by itself + 1
The integer option controls several behaviors, so it is a bit mask: you can specify one or more behaviors

Source | Google | Stack overflow

Edit

git clone [email protected]:casecommons/pg_search.git

cd pg_search

open lib/pg_search/features/tsearch.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-PgSearch--Features--TSearch-normalization-for-pr

# Commit to git

git add lib/pg_search/features/tsearch.rbgit commit -m "better docs for PgSearch::Features::TSearch#normalization"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-PgSearch--Features--TSearch-normalization-for-pr

hub pull-request

# Celebrate!