Postgres on Rails FATAL: database does not exist

You need to create the databases first. Run rake db:create:all

Also make sure your yml file is set up correctly for postgres.

I was having a similar problem. I checked different websites and tried what they suggested but didn't work. Then I tried what you suggested. rake db:create:all and rake db:migrate it worked for me. Thank you!

db:create:all and db:migrate did not work for me first. I changed my database name from development.pg to developmentpg in myapp/config/database.yml file:

database: db/developmentpg

and then rake db:create:all and rake db:migrate, it worked for me.

Thank you