Only add attr_accessible when using Rails >= 3.2.3

spec/support/rails_template.rb

@@ -10,7 +10,9 @@
 
 # Generate some test models
 generate :model, "post title:string body:text published_at:datetime author_id:integer category_id:integer"
-inject_into_file 'app/models/post.rb', "  belongs_to :author, :class_name => 'User'\n  belongs_to :category\n  accepts_nested_attributes_for :author\n  attr_accessible :author\n", :after => "class Post < ActiveRecord::Base\n"
+inject_into_file 'app/models/post.rb', "  belongs_to :author, :class_name => 'User'\n  belongs_to :category\n  accepts_nested_attributes_for :author\n", :after => "class Post < ActiveRecord::Base\n"
+# Rails 3.2.3 model generator declare attr_accessible
+inject_into_file 'app/models/post.rb', "  attr_accessible :author\n", :before => "end" if Rails::VERSION::STRING >= '3.2.3'
 generate :model, "user type:string first_name:string last_name:string username:string age:integer"
 inject_into_file 'app/models/user.rb', "  has_many :posts, :foreign_key => 'author_id'\n", :after => "class User < ActiveRecord::Base\n"
 generate :model, "publisher --migration=false --parent=User"