Ruby and Rails how to connect mysql?

Question

Ruby on Rails

Hey guys.
I can't make friends with ROR and mysql
Created a new project
rails new project -d mysql
added
gem 'mysql2'
to gemfile Made
gem mysql2 insatll
Corrected database.yml

default: &default
  adapter: mysql2
  database: ruby
  username: ruby
  password: 12345
  host: localhost
  encoding: utf8
  socket: /var/lib/mysql/mysql.sock

development:
  <<: *default

test:
  <<: *default

production:
  <<: *default

I launched it and on the site I see
Specified 'mysql2' for database adapter, but the gem is not loaded. Add `gem 'mysql2'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).
He asks me to add to the gemfile what is already there, what's the trick?

Answer 1

Solved, stupefied
gem 'mysql2', '~> 0.3.11'

Answer 2

make a bundle