How to handle Ruby on Rails error: "Please install the postgresql adapter: `gem install activerecord-postgresql-adapter'"

Created Nov 2, 2009 Edited Nov 2, 2009

Viewed 35415

Running a Ruby on Rails (RoR) app or Ruby code which uses the ActiveRecord framework, you get the error message:

Please install the postgresql adapter: gem install activerecord-postgresql-adapter

Trying to run:

gem install activerecord-postgresql-adapter

also fails, leaving you at a loss.