#config/environment.rbに自作クラスをrequire
lib/
├ assets/
├ tasks/
└ test.rb <-追加
test.rb
class Test
def aa
puts "aa"
end
end
##config/environment.rbを編集
environment.rb
# Load the Rails application.
require_relative 'application'
require 'test' #これを追記
# Initialize the Rails application.
Rails.application.initialize!
##使えるかテスト
% rails c
Running via Spring preloader in process 62643
Loading development environment (Rails 6.0.3.2)
[1] pry(main)> Test
=> Test
以上