ruby on rails - Extend ActiveRecord -

my first foray modules!

lib/model_extension/say_hello

module firstmodule end  class activerecord::base   include firstmodule end

the code in example raises error:

lib/model_extension/say_hello.rb:5:in `<top (required)>': uninitialized constant activerecord (nameerror)

so mean? need include activerecord::base before telling include modules? putting module in wrong place?

and how should include module in model?

include firstmodule

would trick, properway it? when install gem alters models, include this:

has_secure_password

how should set can include module that?

EIght