title: Aws::Errors::MissingRegionError in ListingsController#update missing region; use :region option or export region name to ENV['AWS_REGION']
body: <p>I am getting error as:</p>
  
  <blockquote>
    <p>Aws::Errors::MissingRegionError in ListingsController#update missing
    region; use :region option or export region name to ENV['AWS_REGION']</p>
  </blockquote>
  
  <p>I've been stuck at trying to get my S3 attached to paperclip for about 3 days now. This is my latest error.This error is from my local. Heroku doesnt give me an error; however, after checking my picture url it does not have s3 in it. My brain is completely fried trying to figure this out.</p>
  
  <p><strong>config/env/pro.rb</strong></p>
  
  <pre><code>Rails.application.configure do
  
  config.paperclip_defaults = {
      storage: :s3,
      s3_host_name: "s3-us-east-1.amazonaws.com",
      s3_credentials: {
          bucket: ENV['AWS_BUCKET'],
          access_key_id: ENV['AWS_ACCESS_KEY_ID'],
          secret_access_key: ENV['AWS_SECRET_ACCESS_KEY'],
          s3_region: ENV['us-east-1']
          }
  
      }
    # Settings specified here will take precedence over those in       config/application.rb.
  
    # Code is not reloaded between requests.
    config.cache_classes = true
  
    # Eager load code on boot. This eager loads most of Rails and
    # your application in memory, allowing both threaded web servers
     # and those relying on copy on write to perform better.
    # Rake tasks automatically ignore this option for performance.
    config.eager_load = true
  
    # Full error reports are disabled and caching is turned on.
    config.consider_all_requests_local       = false
    config.action_controller.perform_caching = true
  
    # Disable serving static files from the `/public` folder by default since
    # Apache or NGINX already handles this.
    config.public_file_server.enabled =      ENV['RAILS_SERVE_STATIC_FILES'].present?
  
   # Compress JavaScripts and CSS.
    config.assets.js_compressor = :uglifier
    # config.assets.css_compressor = :sass
  
    # Do not fallback to assets pipeline if a precompiled asset is   missed.
    config.assets.compile = false
  
    # `config.assets.precompile` and `config.assets.version` have moved   to config/initializers/assets.rb
  
    # Enable serving of images, stylesheets, and JavaScripts from an asset server.
    # config.action_controller.asset_host = 'http://assets.example.com'
  
    # Specifies the header that your server uses for sending files.
    # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
    # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX
  
    # Mount Action Cable outside main process or domain
    # config.action_cable.mount_path = nil
    # config.action_cable.url = 'wss://example.com/cable'
    # config.action_cable.allowed_request_origins = [   'http://example.com', /http:\/\/example.*/ ]
  
    # Force all access to the app over SSL, use Strict-Transport-  Security, and use secure cookies.
    # config.force_ssl = true
  
    # Use the lowest log level to ensure availability of diagnostic       information
    # when problems arise.
    config.log_level = :debug
  
    # Prepend all log lines with the following tags.
    config.log_tags = [ :request_id ]
  
    # Use a different cache store in production.
    # config.cache_store = :mem_cache_store
  
    # Use a real queuing backend for Active Job (and separate queues per environment)
    # config.active_job.queue_adapter     = :resque
    # config.active_job.queue_name_prefix = "Joeget_#{Rails.env}"
    config.action_mailer.perform_caching = false
  
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate   delivery to raise delivery errors.
   # config.action_mailer.raise_delivery_errors = false
  
    # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
     # the I18n.default_locale when a translation cannot be found).
    config.i18n.fallbacks = true
  
     # Send deprecation notices to registered listeners.
    config.active_support.deprecation = :notify
  
     # Use default logging formatter so that PID and timestamp are not suppressed.
     config.log_formatter = ::Logger::Formatter.new
  
   # Use a different logger for distributed setups.
   # require 'syslog/logger'
   # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new   'app-name')
  
    if ENV["RAILS_LOG_TO_STDOUT"].present?
     logger           = ActiveSupport::Logger.new(STDOUT)
     logger.formatter = config.log_formatter
      config.logger = ActiveSupport::TaggedLogging.new(logger)
    end
  
    # Do not dump schema after migrations.
    config.active_record.dump_schema_after_migration = false
  end
  </code></pre>
  
  <p>paperclip.rb</p>
  
  <pre><code>Paperclip::Attachment.default_options[:url] =   ':http://joeget.s3.amazonaws.com' 
  Paperclip::Attachment.default_options[:path] = "#    {Rails.root}/public/system/:class/:attachment/:id_partition/:style/:filename"
  Paperclip::Attachment.default_options[:s3_host_name] = 's3-us-east-1.amazonaws.com'
  </code></pre>