docs/fulltext_search.md

Summary

Maintainability
Test Coverage
## Fulltext search

We are using the postgres text search mecanism

for more info look at:

http://dev.mikamai.com/post/77171462056/easy-full-text-search-with-postgresql-and-rails

We use the gem `pg_search` for that.

https://github.com/Casecommons/pg_search