From: Calvin Bornhofen <calvin.bornhofen@...>
Date: 2013-01-10T07:33:40+09:00
Subject: Re: Extending class

Hello,

I don't know if my tip applies for you (haven't worked with neither 
Rails nor Mongoid), but your scenario looks like subclassing is the way 
to go; you have a UserForForum class, which is a more specialized form 
of User.

A way of extending a class like a module doesn't exist in Ruby afaik.

Regards,

Calvin

On 09.01.2013 23:12, Damjan Rems wrote:
> In my scenario somewhere in the future someone would make a gem, which
> would need to extend User class. I found out that it can be done this
> way:
>
> User::field :signature, type: String
> User::belongs_to :visit
> User::embeds_many :roles
>
> but it is kinda ugly. Then I realize that extend keyword exists, but it
> is possible to extend only modules not classes. So this realy nice
> example would work only if User is a module.
>
> class UserForForum
>   extend User
>
>   field :signature, type: String
>
>   belongs_to :visit
>   embeds_many :roles
> end
>
> Is there a clear way of extending classes?