Why can't gem pg install when starting rails server?

Question

Ruby on Rails

Hello!
I start the rails server with the command.
rails s

There was an error while trying to load the gem 'pg'.
I installed the gem successfully, ran the commands Bundle install, bundle update, bundle lock.

What could be the problem? Tell me please =)

Answer 1

I found a solution!
You need to run the command:
ridk exec pacman -S mingw-w64-x86_64-postgresql
And reinstall the pg gem.

Answer 2

You need to check that there is a line in the Gemfile
gem 'pg'
Then run
bundle install