Good filtering route file

gistfile1.rb

# routes.rb

match 'posts/filter/:by_attribute/:value' => 'posts#filter', :constraints => { :by_attribute => /^title$|^content$|^author_name$|^post_number$/ }

# posts_controller.rb

class PostsController < ApplicationController
 
  def filter
    @posts = Post.where(params[:by_attribute] => params[:value])
  end

end