“postgresql gem is not loaded” error deploying a Ruby on Rails application on Heroku

Question

I am trying to use postgresql with Ruby on Rails on Heroku but got an error

Specified \'postgresql\' for          


        

Answer 1

This worked for me

gem 'pg', '~> 0.20'

Thanks to Piers C

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Heroku and Rails: Gem Load Error with Postgres, however it is Specified in GEMFILE