Rails upload using Carrierwave + Fog + Openstack Swift

_form.html.erb

<% # app/views/pictures/_form.html.erb

<%= form_for(@picture) do |f| %>
  <% if @picture.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@picture.errors.count, "error") %> prohibited this picture from being saved:</h2>
    
      <ul>
      <% @picture.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="field">
    <%= f.label :title %><br>
    <%= f.text_field :title %>
  </div>
  <div class="field">
    <%= f.label :image %><br>
    <%= f.file_field :image %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

carrierwave.rb

# config/initializers/carrierwave.rb

CarrierWave.configure do |config|
  config.storage = :fog

  config.fog_credentials = {
    provider: 'openstack',
    openstack_tenant: "Framgia Picture Show",
    openstack_api_key: "password",
    openstack_username: "username",
    openstack_auth_url: "http://192.168.1.107:35357/v2.0/tokens"
  } 
  config.fog_directory = "framgia-pictures"
  config.fog_public = false
end

Gemfile

source 'https://rubygems.org'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.0.3'
gem 'sqlite3'
gem "rmagick"
gem "carrierwave"
gem "fog"

image_uploaders.rb

# app/uploaders/image_uploaders.rb
class ImageUploader < CarrierWave::Uploader::Base
  include CarrierWave::RMagick

  version :thumb do
    process :resize_to_limit => [200, 200]
  end
end

index.html.erb

<% # app/views/pictures/index.html.erb %>

<h1>Listing pictures</h1> 
  
<table>
  <tbody>
    <% @pictures.each do |picture| %>
      <tr>
        <td><h2><%= picture.title %></h2></td> 
      </tr>
      <tr>
        <td><%= image_tag picture.public_url(:thumb) %></td>
        <td><%= link_to 'Show', picture %></td>
        <td><%= link_to 'Edit', edit_picture_path(picture) %></td>
        <td><%= link_to 'Destroy', picture, method: :delete, data: { confirm: 'Are you sure?' } %></td>
      </tr>
      <tr><td><hr /></td></tr>
    <% end %>
  </tbody>
</table>
    
<br>
  
<%= link_to 'New Picture', new_picture_path %>

picture.rb

# app/models/picture.rb
class Picture < ActiveRecord::Base
  mount_uploader :image, ImageUploader

  def public_url thumb = false
    file_name = thumb ? self.image.url(:thumb) : self.image.url
    "http://192.168.1.107:8080/v1/AUTH_8684c73a2e814bdeb314f40c5830a708/framgia-pictures/#{file_name}"
  end
end

show.html.erb

<% # app/views/pictures/show.html.erb %>

<p id="notice"><%= notice %></p>

<p>
  <h2><%= @picture.title %></h2>
</p>

<p>
  <%= image_tag @picture.public_url %>
</p>

<%= link_to 'Edit', edit_picture_path(@picture) %> |
<%= link_to 'Back', pictures_path %>