Permission denied - /assets

has_attached_file :avatar,
  :url  => "/avatars/:id?style=:style",
  :styles => { :large => "190x190#", :medium => "70x70#", :thumb => "106x106#" },
  :path => "/assets/rob/images/Users/:id/:style/:basename.:extension"

:path => "~/robotimus/dev_images/:id/:style/:basename.:extension"

def images_path
  Rails.env.production? ? "/assets/rob/images/Users/" : "~/robotimus/dev_images"
end

:path => images_path + "/:id/:style/:basename.:extension"

# config/paperclip.yml
common: &common
  :styles:
    :thumb: "50x50#"
    :small: "80x80#"
    :medium: "200x150#"
    :normal: "320x240#"
    :large: "800x600#"
  :default_url: "/images/default_image.png"


development:
  <<: *common

production:
  <<: *common
  :storage: :s3
  :bucket: "your-bucket-name"
  :path: "/:some/:path/:id"
  :url: "s3_domain_url

test:
  <<: *common

# config/initializers/config.rb
require 'ostruct'

def load_config_yaml(config_file)
  YAML.load(File.read(Rails.root.join('config', config_file)))[Rails.env]
end

AppConfig = OpenStruct.new(load_config_yaml('application.yml'))

AppConfig.paperclip = load_config_yaml('paperclip.yml')

# app/models/image.rb
class Image < ActiveRecord::Base
  has_attached_file :photo, AppConfig.paperclip
end