Ruby getter and setter

In Ruby, getters and setters are typically defined by using class method attr_accessor

class Foo 
  attr_accessor :bar,  :baz
end 

foo = Foo.new 
#=> #<Foo:0x007fada99c2d00>
foo.bar #=> nil 
foo.bar = "jelly"
foo.bar #=> "jelly"

attr_accessor is different than Rails’s attr_accessible attr_accessor sets up getters and setters for those instance variables.

def bar
  @bar
end

def bar= value 
  @bar = value
end
...

attr_reader will define only the getter methods attr_writer will define only setter methods