Bad routing filter example

gistfile1.rb

# routes.rb

match 'posts/filter/:by_attribute/:value' => 'posts#filter'

# posts_controller.rb

class PostsController < ApplicationController
 
  def filter
    if ["title", "content", "author_name", "post_number"].include? params[:by_attribute]
      @posts = Post.where(params[:by_attribute] => params[:value])
    else
      render :nothing => true, :status => :not_found
    end
  end

end