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# config/environment/production.rb
require File.expand_path('../boot', __FILE__)

require 'rails/all'

# If you have a Gemfile, require the gems listed there, including any gems
# you've limited to :test, :development, or :production.
Bundler.require(:default, Rails.env) if defined?(Bundler)

module Example

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# app/controllers/application_controller.rb
class ApplicationController < ActionController::Base
  rescue_from(ActionController::RoutingError) {
    render :template => 'errors/404'
  }
end

# config/initializers/show_exceptions.rb
require 'action_dispatch/middleware/show_exceptions'

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/ app/views/errors/not_found.html.haml
%h1 The page you were looking for doesn't exist.
%p
  You may have mistyped the address or the page may have moved.
%script{ :type => 'text/javascript' }
  var GOOG_FIXURL_LANG = '#{I18n.locale}';
  var GOOG_FIXURL_SITE = '#{request.protocol}#{request.host}';
%script{ :type => 'text/javascript', :src => 'http://linkhelp.clients.google.com/tbproxy/lh/wm/fixurl.js' }

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# app/controllers/errors_controller.rb
class ErrorsController < ApplicationController
  ERRORS = [ 
    :internal_server_error,
    :not_found,
    :unprocessable_entity
  ].freeze
  
  ERRORS.each do |e|
    define_method e do

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# config/initializers/show_exceptions.rb
require 'action_dispatch/middleware/show_exceptions'

module ActionDispatch
  class ShowExceptions
    private
      def render_exception_with_template(env, exception)
        body = ErrorsController.action(rescue_responses[exception.class.name]).call(env)
        log_error(exception)
        body

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# app/controllers/application_controller.rb
class ApplicationController < ActionController::Base
  rescue_from(ActionController::RoutingError) {
    render :template => 'errors/404'
  }
end

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class List
  include MongoMapper::Document
  
  key :name, String, :required => true

  many :items
end

class Item
  include MongoMapper::EmbeddedDocument