Groups of users

I have small project with users, users posts, friendships, comments. I want to make groups of users. Can you help me make it? or send to make links to tutorials or books. thank开发者_开发技巧 u so much

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It sounds like you want a many-to-many relationship. There are two ways to do this, and this railscasts episode describes them (note that it is for Rails 2.x but the general idea carries over to Rails 3).

I'd also recommend looking at these two guides:

• The has_and_belongs_to_many Association
• The has_many :through Association