rails_6.1.gemfile

source 'https://rubygems.org'

# Specify your gem's dependencies in active_record_union.gemspec
gemspec

gem 'rails', '~> 6.1.0'

# https://github.com/rails/rails/blob/v6.1.7.10/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
gem "pg", "~> 1.1"

# https://github.com/rails/rails/blob/v6.1.2/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb#L13
gem "sqlite3", "~> 1.4"

# https://github.com/rails/rails/blob/v6.1.7.10/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
gem "mysql2", "~> 0.5"