app/models/imageninicio.rb

error.txt

I, [2017-03-28T12:58:20.078441 #3189]  INFO -- : Completed 500 Internal Server Error in 86ms (ActiveRecord: 27.9ms) 
F, [2017-03-28T12:58:20.080385 #3189] FATAL -- :  
Sprockets::FileOutsidePaths (/var/www/clients/client1/web52/tmp/generate_css/_comImageninicio.scss is no longer under a load path: /var/www/clients/client1/web52/app/assets/fonts, /var/www/clients/client1/web52/app/assets/images, /var/www/clients/client1/web52/app/assets/javascripts, /var/www/clients/client1/web52/app/assets/stylesheets, /var/www/clients/client1/web52/vendor/assets/javascripts, /var/www/clients/client1/web52/vendor/assets/stylesheets, /var/lib/gems/2.1.0/gems/ahoy_matey-1.2.1/vendor/assets/javascripts, /var/lib/gems/2.1.0/gems/bxslider-rails-4.2.5.1/vendor/assets/images, /var/lib/gems/2.1.0/gems/bxslider-rails-4.2.5.1/vendor/assets/javascripts, /var/lib/gems/2.1.0/gems/bxslider-rails-4.2.5.1/vendor/assets/stylesheets, /var/lib/gems/2.1.0/gems/chartkick-2.0.0/app/assets/javascripts, /var/lib/gems/2.1.0/gems/chartkick-2.0.0/vendor/assets/javascripts, /var/lib/gems/2.1.0/gems/lightbox2-rails-2.7.1/vendor/assets/images, /var/lib/gems/2.1.0/gems/lightbox2-rails-2.7.1/vendor/assets/javascripts, /var/lib/gems/2.1.0/gems/lightbox2-rails-2.7.1/vendor/assets/stylesheets, /var/lib/gems/2.1.0/gems/leaflet-rails-0.7.7/vendor/assets/images, /var/lib/gems/2.1.0/gems/leaflet-rails-0.7.7/vendor/assets/javascripts, /var/lib/gems/2.1.0/gems/leaflet-rails-0.7.7/vendor/assets/stylesheets, /var/lib/gems/2.1.0/gems/activeadmin-1.0.0.pre1/app/assets/images, /var/lib/gems/2.1.0/gems/activeadmin-1.0.0.pre1/app/assets/javascripts, /var/lib/gems/2.1.0/gems/activeadmin-1.0.0.pre1/app/assets/stylesheets, /var/lib/gems/2.1.0/gems/jquery-ui-rails-5.0.5/app/assets/images, /var/lib/gems/2.1.0/gems/jquery-ui-rails-5.0.5/app/assets/javascripts, /var/lib/gems/2.1.0/gems/jquery-ui-rails-5.0.5/app/assets/stylesheets, /var/lib/gems/2.1.0/gems/formtastic-3.1.3/app/assets/stylesheets, /var/lib/gems/2.1.0/gems/ckeditor-4.1.4/app/assets/javascripts, /var/lib/gems/2.1.0/gems/ckeditor-4.1.4/app/assets/stylesheets, /var/lib/gems/2.1.0/gems/ckeditor-4.1.4/vendor/assets/javascripts, /var/lib/gems/2.1.0/gems/turbolinks-2.5.3/lib/assets/javascripts, /var/lib/gems/2.1.0/gems/jquery-rails-4.0.5/vendor/assets/javascripts, /var/lib/gems/2.1.0/gems/coffee-rails-4.1.0/lib/assets/javascripts, /var/lib/gems/2.1.0/gems/bourbon-3.2.4/app/assets/stylesheets): 
  app/models/imageninicio.rb:119:in `asset_source' 
  app/models/imageninicio.rb:99:in `generate_css' 
  app/models/imageninicio.rb:69:in `actualizar_css' 

imageninicio.rb

# -*- encoding : utf-8 -*-
class Imageninicio < ActiveRecord::Base

   after_save :actualizar_css
    translates :titulo, :texto
  # En la plantilla
  # has_attached_file :file, :styles => {:muygrande => '1500x1000', :grande => '800x800', :medium => '300x300>', :thumb => '100x100>', :icon => '64x64>'  }, :default_url => '/images/:style/missing.png'

  # Nuevo modelo
  has_attached_file :imagen, :styles => {
   # Relación de aspecto 16:9. Descomentar las que se vayan a utilizar en
   # <picture>
   :lands_1x => "320x180",
   :lands_2x => "640x360",
   :lands_3x => "960x540",
   :lands_4x => "1280x720",
   :lands_5x => "1600x900",
   :lands_6x => "1920x1080",
   :lands_7x => "2240x1260",
   :lands_8x => "2560x1440",

    #      :port_1x => "360x640",
    #      :port_2x => "720x1280",
    #      :port_3x=> "1080x1920",
    #      :port_2x_2x => "1440x2560",
    #      :port_2x_3x => "2160x3840",
           #port_3x_2x => Igual que 2x_3x
    #      :port_3x_3x => "3240x5760",
     :icon_lands => "128x72",
     :icon_port => "72x128",
     #      :tablet_lands => "800x480",
     #      :tablet_port => "480x800",

     # Relación de aspecto 4:3. Descomentar las que se vayan a utilizar en
     # <picture>
     #      :ipad_lands_1x => "640x480",
     #      :ipad_lands_2x => "1280x960",
     #      :ipad_lands_3x => "1400x1050",
     #      :ipad_port_1x => "480x640",
     #      :ipad_port_2x => "960x1280",
     #      :ipad_port_3x => "1050x1440",

     #facebook
     :facebook => "1200x830",

     # Ratio cuadrado
         :icon => "72x72",
         :thumb => "100x100>" }, 
          convert_options: {all: "-auto-orient"},
          :url =>  "/imagenesinicio/:style/:id/:basename.:extension",
          :path => "public/imagenesinicio/:style/:id/:basename.:extension"

  validates_attachment_content_type :imagen, :content_type => /\Aimage\/.*\Z/
  
  #devuelve las dimensiones con las que una imagen se ha guardado en el disco duro
  # Ya incluye el método file
  def dimensiones(estilo = :original)
    Paperclip::Geometry.from_file(self.imagen.path(estilo))
  end


  def actualizar_css
     @nombreFichero = '_comImageninicio'
     @ficheroCss = File.new(scss_file_path, 'w')
     @body = ERB.new(File.read(template_file_path)).result(binding)
     @env = Rails.application.assets
     create_scss
     begin
        @ficheroCss.write generate_css
        @ficheroCss.sync = true
        @ficheroCss.flush
     ensure
        @ficheroCss.close
        File.delete(@ficheroCss)
     end
  end

  def scss_file_path
     @scss_file_path ||= File.join(scss_tmpfile_path, "#{@nombreFichero}.scss")
  end

  def scss_tmpfile_path
     @scss_file_path ||= File.join(Rails.root, 'tmp', 'generate_css')
     unless File.exists?(@scss_file_path)
        FileUtils.mkdir_p(@scss_file_path)
     end
     @scss_file_path
  end

  def template_file_path
     @template_file_path ||= File.join(Rails.root, 'app', 'assets', 'stylesheets', 'com', '_comImageninicio.css.scss.erb')
  end

  def create_scss
     File.open(scss_file_path, 'w') {|f| f.write(@body)}
  end

  def generate_css
     Sass::Engine.new(asset_source, {
        syntax: :scss,
        cache: false,
        read_cache: false,
        style: :compressed
     }).render
  end

  def asset_source
     #config = Rails.application.config
     #config.assets.prefix = 'tmp/generate_css'
     #config.assets.digest = true
     #target = File.join(Rails.public_path, config.assets.prefix)
     # @env.append_path target 
      #@env.append_path 'tmp/generate_css'
     if @env.find_asset(@nombreFichero)
        @env.find_asset(@nombreFichero).source
     else
        uri = Sprockets::URIUtils.build_asset_uri(@scss_file_path, type: "text/css")
        asset = Sprockets::UnloadedAsset.new(uri,@env)
        @env.load(asset.uri).source
     end
  end
end