Ruby include module's single method in model

Question

I have a module of following

module SimpleTask
    def task1
    end
    def task2
    end
    def task3
    end
end

And I have a model which r

Answer 1

You could add

module SimpleTask
    def task1
    end
    def task2
    end
    def task3
    end
    module_function :task2
end

So that you can call the method like a class method on the module as well as having it as an instance method in the places you do want all three methods, ie:

class Foo
   include SimpleTask
end #=> Foo.new.task2
class LessFoo
   def only_needs_the_one_method
      SimpleTask.task2
   end
end #=> LessFoo.new.only_needs_the_one_method

Or, if there's really no shared state in the module and you don't mind always using the module name itself, you can just declare all the methods class-level like so:

module SimpleTask
    def self.task1
    end
    def self.task2
    end
    def self.task3
    end
end

class Foo
   include SimpleTask # Does, more or less nothing now
   def do_something
     SimpleTask.task1
   end
end 
#=> Foo.new.task2 #=> "task2 not a method or variable in Foo"
#=> Foo.new.do_something does, however, work
class LessFoo
   def only_needs_the_one_method
      SimpleTask.task2
   end
end #=> LessFoo.new.only_needs_the_one_method works as well in this case

But you'd have to change all the callers in that case.