inline ActiveRecord and Bundler

all.rb

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"  
  gem "activerecord"
  gem "sqlite3"
end

require "active_record"
require "logger"

ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :fruits, force: true do |t|   
  end
end

class Fruit < ActiveRecord::Base
end