class Company1 < Sequel::Model( :companies1 )
  before_create do
    set( :time_created => Time.now )
  end
  
  before_destroy do
    Employee1.where( :company_id => pk ).destroy
  end
end

class Employee1 < Sequel::Model( :employees1 )
  validates_length_of :name, :minimum => 8
end

class Company2 < Sequel::Model( :companies2 )
end

class Employee2 < Sequel::Model( :employees2 )
end

class Author1 < Sequel::Model( :authors1 )
  def posts
    Post1.where( :author_id => pk )
  end
  
  def update_post_count
    post_count = posts.size
    save
  end
end

class Post1 < Sequel::Model( :posts1 )
  def author
    Author1[ author_id ]
  end
  
  after_destroy do
    author.update_post_count
  end
end

class Author2 < Sequel::Model( :authors2 )
  def posts
    Post2.where( :author_id => pk )
  end
end

class Post2 < Sequel::Model( :posts2 )
  def author
    Author2[ author_id ]
  end
end