README.md in smart_attr-0.1.1 vs README.md in smart_attr-0.2.0

@@ -77,49 +77,59 @@
 
 ### Used With ActiveRecord
 
 It is almost the same like the basic usage when used with ActiveRecord.
 
-The only difference is that it will not create an instance_variable to store the value when you set value for the attribute.
+There is just one difference between this and the basic usage, however, there is one extra  functionality when used with ActiveRecord.
+
+The only one difference is that it will not create an instance_variable to store the value when you set value for the attribute.
 This is because it will store the value in the database. 
+And the extra functionality is that it will define scope for you when used with ActiveRecord.
 
 For example, suppose you have a class named "Movie" with database table 'movies', then you should ensure that 'movies' have column 'star' before you use 'smart_attr :star, config: { # something }'
 
 ```ruby
-class Movie
+class Song < ActiveRecord::Base
 
   include SmartAttr::Base
 
   smart_attr :star, config: {
     one:    { value: 1, desc: 'one star' },
     two:    { value: 2, desc: 'two star' },
     three:  { value: 3, desc: 'three star' },
     four:   { value: 4, desc: 'four star' },
     five:   { value: 5, desc: 'five star' }
   }
+
 end
 
-Movie.star_config_hash
-# => { :one=>{:value=>1, :desc=>"one star"},
-#      :two=>{:value=>2, :desc=>"two star"},
-#      :three=>{:value=>3, :desc=>"three star"},
-#      :four=>{:value=>4, :desc=>"four star"},
-#      :five=>{:value=>5, :desc=>"five star"}
-#    }
 
-movie = Movie.new # => #<Movie:0x007fcc041b0490>
+song = Song.new(star: 0)
 
-movie.star = 1  # => 1
-movie.star_name # => :one
-movie.star_desc # => "one star"
-movie.star_one? # => true
-movie.star_two? # => false
+song.save
 
-movie.star_two! # => 2
-movie.star      # => 2
-movie.star_two? # => true
+song.star = 1  # => 1
+song.star_name # => :one
+song.star_desc # => "one star"
+song.star_one? # => true
+song.star_two? # => false
 
-movie.star_config # => {:value=>2, :desc=>"two star", :key=>:two}
+song.star_two! # => 2
+song.star      # => 2
+song.star_two? # => true
+
+song.reload
+song.star # => 1
+song.star_two!
+song.save
+song.reload
+song.star # => 2
+
+song.star_config # => {:value=>2, :desc=>"two star", :key=>:two}
+
+# scope
+Song.star_one # The same as: Song.where(star: 1)
+Song.star_two # The same as: Song.where(star: 2)
 ```
 
 ### Used With Mongoid
 
 Same like used with ActiveRecord.