gistfile1.rb

unless File.exist?('Gemfile')
  File.write('Gemfile', <<-GEMFILE)
    source 'https://rubygems.org'
    gem 'rails', github: 'rails/rails'
    gem 'arel', github: 'rails/arel'
    gem 'sqlite3'
  GEMFILE
  system('bundle')
end
require 'bundler'
Bundler.setup(:default)

require 'active_record'
require 'minitest/autorun'
require 'logger'

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :projects do |t|
    t.string :name
  end
  create_table :tasks do |t|
    t.integer :project_id
  end
end

class Project < ActiveRecord::Base
  has_many :tasks
  accepts_nested_attributes_for :tasks, allow_destroy: true  
end

class Task < ActiveRecord::Base
  belongs_to :project
end

class BugTest < Minitest::Test
  def test_ids_problem
    assert Project.create({"name"=>"Idiot", "task_ids"=>["", "2", "3", "1"]})
  end
end

Hi guys. How can i run a gist. With "ruby xxx.rb"?