Custom Tags & Filters for LocomotiveCMS

blog_filters.rb

module Locomotive
  module Liquid
    module Filters

      # Module with custom filters
      module Blog

        # Creates a list of tags from a tags string, tags separated by comma
        def tags(tags_string)
          tags_string.split(', ').collect{|t| '<li><a href="/blog/tags/'+t+'" title="'+t.capitalize+'">'+t+'</a></li>'}.join()
        end

        # Register filter
        ::Liquid::Template.register_filter(Blog)
      end
    end
  end
end

locomotive_blog.rb

module LocomotiveBlog
  class Engine < Rails::Engine
    def self.activate
      require 'locomotive/liquid/drops/base'

      # Load template tags and filters
      %w{. tags drops filters}.each do |dir|
        Dir[File.join(File.dirname(__FILE__), 'locomotive', 'liquid', dir, '*.rb')].each do |lib|
          Rails.env.production? ? require(lib) : load(lib)
        end
      end
    end

    config.to_prepare &method(:activate).to_proc
  end
end

popular_tags.rb

module Locomotive
  module Liquid
    module Tags
      class Popular < ::Liquid::Tag
        def render(context)
          # Here we assume that LocomotiveCMS configured to be working in one website mode
          @current_site = Site.first

          # Get a list of posts and order them by likes
          @posts = @current_site.content_types.where(:slug=>'posts').first.ordered_contents.sort{|x,y| y.likes <=> x.likes }

          # Catch top five posts and format them into html list
          @posts[0,5].collect{|p| '<li><a href="/blog/'+p._permalink+'" title="'+p.title+'">'+p.title+'</a></li>'}.join()
        end
      end
      ::Liquid::Template.register_tag('popular', Popular)
    end
  end
end

Where did you put those files?

Looks like I have them in /lib folder and then include in config/application.rb:

module Lovell
  class Application < Rails::Application
    [HERE]