Rails include module

module Features
  FEATURES = [Running, Walking]

  # include Features::Running
  FEATURES.each do |feature|
    include feature
  end

  module ClassMethods
    # include Features::Running::ClassMethods
    FEATURES.each do |feature|
      include feature::ClassMethods
    end
  end

  module InstanceMethods
    def method_missing(meth)
      # Catch feature checks that are not included in models to return false
      if meth[-1] == '?' && meth.to_s =~ /can_(\w+)\z?/
        false
      else
        # You *must* call super if you don't handle the method,
        # otherwise you'll mess up Ruby's method lookup
        super
      end
    end
  end

  def self.included(base)
    base.send :extend, ClassMethods
    base.send :include, InstanceMethods
  end
end

# lib/features/running.rb
module Features::Running
  module ClassMethods
    def can_run
      ...

      # Define a method to have model know a way they have that feature
      define_method(:can_run?) { true }
    end
  end
end

# lib/features/walking.rb
module Features::Walking
  module ClassMethods
    def can_walk
      ...

      # Define a method to have model know a way they have that feature
      define_method(:can_walk?) { true }
    end
  end
end

Source: stackoverflow.com

Similar codes

0 vote195 views2 answers
Infinite loop ruby
Ruby
0 vote212 views1 answer
Rails form select boolean
Ruby
4 votes202 views1 answer
Rails g resource
Ruby
0 vote189 views1 answer
Rails content for head
Ruby
0 vote192 views1 answer
Rails change database connection
Ruby
0 vote185 views1 answer
Number of trailing zeros in a factorial of a number.
Ruby
0 vote192 views1 answer
Missing template clients/show with {:locale=>[:en], :formats=>[:pdf],
Ruby
0 vote193 views1 answer
Rails logger stdout
Ruby
0 vote202 views1 answer
Ruby method
Ruby
0 vote130 views1 answer
Rails server not updating
Ruby