Files needed to render locomotive pages from your own controllers

application.rb

# config/application.rb
...
module Myliufoto
  class Application < Rails::Application

    def self.activate
      if Rails.env.development?
        load File.join(config.root, 'lib', 'locomotive', 'rails', 'render.rb')
      else
        require File.join(config.root, 'lib', 'locomotive', 'rails', 'render.rb')
      end
      ...
    end

    ....

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

photos_controller.rb

# app/controllers/photos_controller.rb
class PhotosController < ApplicationController
  include Locomotive::Routing::SiteDispatcher
  
  def index
    @album = current_site.albums.where(:slug => params[:album]).first
    render_my_locomotive_page 'portfolio/album'
  end
  
  def show
    @album = current_site.albums.where(:slug => params[:album]).first
    @photo = @album.photos.where(:pos => params[:pos]).first
    render_my_locomotive_page 'portfolio/photo'
  end
  
end

render.rb

# lib/locomotive/rails/render.rb
# Extends the controller to support liquid resource (page, stylesheet, javascript) rendering
ActionController::Base.class_eval do
  include Locomotive::Render::InstanceMethods  
  
  def render_my_locomotive_page(path)
    params[:path] = path
    
    if request.fullpath =~ /^\/admin\//
      render :template => '/admin/errors/404', :layout => '/admin/layouts/box', :status => :not_found
    else
      @page = locomotive_page

      redirect_to(@page.redirect_url) and return if @page.present? && @page.redirect?

      render_no_page_error and return if @page.nil?

      # output = @page.render(locomotive_context)
      output = @page.render(my_context)

      self.prepare_and_set_response(output)
    end
  end
  
  def my_context
    context = locomotive_context
    assigns = self.instance_variables.inject({}) do |h, v|
      if !ActionController::Base.protected_instance_variables.include?(v)
        h.merge!(v.to_s.gsub('@', '') => self.instance_variable_get(v))
      else
        h
      end
    end
    context.scopes[0].merge!(assigns)
    context
  end
  
end

routes.rb

# config/routes.rb
Myliufoto::Application.routes.draw do
  ...  
  match '/portfolio/:album/:pos', :to => 'photos#show'
  match '/portfolio/:album', :to => 'photos#index'
  ...
end