Question

I have a module, whose purpose is to act on any given ActiveRecord instance.

For argument’s sake, let’s say that this method puts the string "match" if it matches certain properties with another instance of the same type.

module Foo
  def check_against_other_instances
    self.all.each do |instance|
      if self.respond_to? :color && self.color == instance.color
        puts "match"
      end
    end
  end
end

However, I can’t just simply call self.all here, because self is an instance. How do I call the class method all from here?

Answer 1

Ah.. found the solution almost right after I asked…

self.class.all.each do |instance|
...