20111218135715_globalize_models.rb

# db/migrate/20111218135715_globalize_models.rb

class GlobalizeModels < ActiveRecord::Migration
  def up
    NewsItem.create_translation_table!(
      {:title => :string, :body => :text},
      {:migrate_data => true}
    )
  end

  def down
    NewsItem.drop_translation_table!
  end
end

_form.html.haml

/ app/views/admin/news_items/_form.html.haml

= semantic_form_for [:admin, @news_item] do |f|

  .language-tabs
    %ul.language-selection
      %li= link_to 'English', "#lang-en"
      - @news_item.translations.each do |lang|
        - unless lang.locale == :en
          %li= link_to ADDITIONAL_LOCALES[lang.locale.to_sym], "#lang-#{lang.locale}"

    %div#lang-en
      = f.inputs 'English Text' do
        = f.input :title
        = f.input :body, :input_html => { 'data-editor-type' => 'wysiwyg' }

    - index = 0
    = f.semantic_fields_for :translations do |lf|
      %div{:id => "lang-#{lf.object.locale}", :style => "#{'display: none;' if lf.object.locale == :en}"}
        = lf.inputs "#{ADDITIONAL_LOCALES[lf.object.locale.to_sym]} Text" do
          = lf.input :title
          = lf.input :body, :input_html => { 'data-editor-type' => 'wysiwyg' }
          = lf.input :locale, :as => :hidden
      - index += 1

  = f.inputs do
    = f.input :published_at

  = f.buttons

:javascript
  $('.language-tabs').tabs({
    show: function(event, ui) {
      $(ui.panel).find("*[data-editor-type=wysiwyg]").tinymce({
        #{render :partial => 'admin/shared/wysiwyg_options'}
      });
    }
  });

_wysiwyg_options.html.erb

# app/views/admin/shared/_wysiwyg_options.html.erb

theme:  'advanced',
skin:   'thebigreason',
theme_advanced_buttons1: 'formatselect,|,bold,italic,underline,|,justifyleft,justifycenter,justifyright,|,bullist,numlist,|,link,unlink,anchor,image,|,undo,redo,|,code',
theme_advanced_buttons2: '',
theme_advanced_buttons3: '',
theme_advanced_toolbar_location: 'top',
theme_advanced_styles: 'Image Left=image_left;Image Right=image_right',
plugins: 'advimage'

active_admin.css.scss

// app/assets/stylesheets/active_admin.css.scss

// Active Admin CSS Styles
@import "active_admin/mixins";
@import "active_admin/base";
@import "jquery-ui/jquery-ui-1.8.16.custom";

// To customize the Active Admin interfaces, add your
// styles here:

li.hidden {
  display: none;
}


/*******************************************************************************
* Language Tabs
*
*******************************************************************************/
.ui-widget-content {
  border: none;
}
.ui-widget-header {
  border: 0;
  border-bottom: 1px solid #ccc;
  background: none;
}
.ui-state-active, .ui-widget-content .ui-state-active, .ui-widget-header .ui-state-active {
  border: 1px solid #ccc;
}
.ui-tabs {
  padding: 0;
}
.ui-tabs .ui-tabs-panel {
  padding: 0;
  padding-top: 20px;
}
.ui-corner-all, .ui-corner-bottom, .ui-corner-left, .ui-corner-bl, {
  -moz-border-radius-bottomleft: 0;
  -webkit-border-bottom-left-radius: 0;
  border-bottom-left-radius: 0;
}
.ui-corner-all, .ui-corner-bottom, .ui-corner-right, .ui-corner-br {
  -moz-border-radius-bottomright: 0;
  -webkit-border-bottom-right-radius: 0;
  border-bottom-right-radius: 0;
}

application.rb

# config/application.rb

...

module YourApp
  class Application < Rails::Application

    ...

    config.i18n.default_locale = :en
    config.i18n.fallbacks = true

    ...

  end
end

Instructions.md

Instructions

After migrating the database, you will only have the 'English' tab when editing an existing model instance. The extra locales will be added when the model is saved, this can be automated by running the following in the console:

YourModel.all.map(&:save)

To-do

1. Remove hard-coding of English language, should use I18n.default_locale instead

jquery-ui-1.8.16.custom.css.scss

// app/assets/stylesheets/jquery-ui/jquery-ui-1.8.16.custom.css.scss

/*
 * jQuery UI CSS Framework 1.8.16
 *
 * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Theming/API
 */

/* Layout helpers
----------------------------------*/
.ui-helper-hidden { display: none; }
.ui-helper-hidden-accessible { position: absolute !important; clip: rect(1px 1px 1px 1px); clip: rect(1px,1px,1px,1px); }
.ui-helper-reset { margin: 0; padding: 0; border: 0; outline: 0; line-height: 1.3; text-decoration: none; font-size: 100%; list-style: none; }
.ui-helper-clearfix:after { content: "."; display: block; height: 0; clear: both; visibility: hidden; }
.ui-helper-clearfix { display: inline-block; }
/* required comment for clearfix to work in Opera \*/
* html .ui-helper-clearfix { height:1%; }
.ui-helper-clearfix { display:block; }
/* end clearfix */
.ui-helper-zfix { width: 100%; height: 100%; top: 0; left: 0; position: absolute; opacity: 0; filter:Alpha(Opacity=0); }


/* Interaction Cues
----------------------------------*/
.ui-state-disabled { cursor: default !important; }


/* Icons
----------------------------------*/

/* states and images */
.ui-icon { display: block; text-indent: -99999px; overflow: hidden; background-repeat: no-repeat; }


/* Misc visuals
----------------------------------*/

/* Overlays */
.ui-widget-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }


/*
 * jQuery UI CSS Framework 1.8.16
 *
 * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Theming/API
 *
 * To view and modify this theme, visit http://jqueryui.com/themeroller/?ffDefault=Verdana,Arial,sans-serif&fwDefault=normal&fsDefault=1.1em&cornerRadius=4px&bgColorHeader=cccccc&bgTextureHeader=03_highlight_soft.png&bgImgOpacityHeader=75&borderColorHeader=aaaaaa&fcHeader=222222&iconColorHeader=222222&bgColorContent=ffffff&bgTextureContent=01_flat.png&bgImgOpacityContent=75&borderColorContent=aaaaaa&fcContent=222222&iconColorContent=222222&bgColorDefault=e6e6e6&bgTextureDefault=02_glass.png&bgImgOpacityDefault=75&borderColorDefault=d3d3d3&fcDefault=555555&iconColorDefault=888888&bgColorHover=dadada&bgTextureHover=02_glass.png&bgImgOpacityHover=75&borderColorHover=999999&fcHover=212121&iconColorHover=454545&bgColorActive=ffffff&bgTextureActive=02_glass.png&bgImgOpacityActive=65&borderColorActive=aaaaaa&fcActive=212121&iconColorActive=454545&bgColorHighlight=fbf9ee&bgTextureHighlight=02_glass.png&bgImgOpacityHighlight=55&borderColorHighlight=fcefa1&fcHighlight=363636&iconColorHighlight=2e83ff&bgColorError=fef1ec&bgTextureError=02_glass.png&bgImgOpacityError=95&borderColorError=cd0a0a&fcError=cd0a0a&iconColorError=cd0a0a&bgColorOverlay=aaaaaa&bgTextureOverlay=01_flat.png&bgImgOpacityOverlay=0&opacityOverlay=30&bgColorShadow=aaaaaa&bgTextureShadow=01_flat.png&bgImgOpacityShadow=0&opacityShadow=30&thicknessShadow=8px&offsetTopShadow=-8px&offsetLeftShadow=-8px&cornerRadiusShadow=8px
 */


/* Component containers
----------------------------------*/
.ui-widget { font-family: Verdana,Arial,sans-serif; font-size: 1.1em; }
.ui-widget .ui-widget { font-size: 1em; }
.ui-widget input, .ui-widget select, .ui-widget textarea, .ui-widget button { font-family: Verdana,Arial,sans-serif; font-size: 1em; }
.ui-widget-content { border: 1px solid #aaaaaa; background: #ffffff image-url("jquery-ui/ui-bg_flat_75_ffffff_40x100.png") 50% 50% repeat-x; color: #222222; }
.ui-widget-content a { color: #222222; }
.ui-widget-header { border: 1px solid #aaaaaa; background: #cccccc image-url("jquery-ui/ui-bg_highlight-soft_75_cccccc_1x100.png") 50% 50% repeat-x; color: #222222; font-weight: bold; }
.ui-widget-header a { color: #222222; }

/* Interaction states
----------------------------------*/
.ui-state-default, .ui-widget-content .ui-state-default, .ui-widget-header .ui-state-default { border: 1px solid #d3d3d3; background: #e6e6e6 image-url("jquery-ui/ui-bg_glass_75_e6e6e6_1x400.png") 50% 50% repeat-x; font-weight: normal; color: #555555; }
.ui-state-default a, .ui-state-default a:link, .ui-state-default a:visited { color: #555555; text-decoration: none; }
.ui-state-hover, .ui-widget-content .ui-state-hover, .ui-widget-header .ui-state-hover, .ui-state-focus, .ui-widget-content .ui-state-focus, .ui-widget-header .ui-state-focus { border: 1px solid #999999; background: #dadada image-url("jquery-ui/ui-bg_glass_75_dadada_1x400.png") 50% 50% repeat-x; font-weight: normal; color: #212121; }
.ui-state-hover a, .ui-state-hover a:hover { color: #212121; text-decoration: none; }
.ui-state-active, .ui-widget-content .ui-state-active, .ui-widget-header .ui-state-active { border: 1px solid #aaaaaa; background: #ffffff image-url("jquery-ui/ui-bg_glass_65_ffffff_1x400.png") 50% 50% repeat-x; font-weight: normal; color: #212121; }
.ui-state-active a, .ui-state-active a:link, .ui-state-active a:visited { color: #212121; text-decoration: none; }
.ui-widget :active { outline: none; }

/* Interaction Cues
----------------------------------*/
.ui-state-highlight, .ui-widget-content .ui-state-highlight, .ui-widget-header .ui-state-highlight  {border: 1px solid #fcefa1; background: #fbf9ee image-url("jquery-ui/ui-bg_glass_55_fbf9ee_1x400.png") 50% 50% repeat-x; color: #363636; }
.ui-state-highlight a, .ui-widget-content .ui-state-highlight a,.ui-widget-header .ui-state-highlight a { color: #363636; }
.ui-state-error, .ui-widget-content .ui-state-error, .ui-widget-header .ui-state-error {border: 1px solid #cd0a0a; background: #fef1ec image-url("jquery-ui/ui-bg_glass_95_fef1ec_1x400.png") 50% 50% repeat-x; color: #cd0a0a; }
.ui-state-error a, .ui-widget-content .ui-state-error a, .ui-widget-header .ui-state-error a { color: #cd0a0a; }
.ui-state-error-text, .ui-widget-content .ui-state-error-text, .ui-widget-header .ui-state-error-text { color: #cd0a0a; }
.ui-priority-primary, .ui-widget-content .ui-priority-primary, .ui-widget-header .ui-priority-primary { font-weight: bold; }
.ui-priority-secondary, .ui-widget-content .ui-priority-secondary,  .ui-widget-header .ui-priority-secondary { opacity: .7; filter:Alpha(Opacity=70); font-weight: normal; }
.ui-state-disabled, .ui-widget-content .ui-state-disabled, .ui-widget-header .ui-state-disabled { opacity: .35; filter:Alpha(Opacity=35); background-image: none; }

/* Icons
----------------------------------*/

/* states and images */
.ui-icon { width: 16px; height: 16px; background-image: image-url("jquery-ui/ui-icons_222222_256x240.png"); }
.ui-widget-content .ui-icon {background-image: image-url("jquery-ui/ui-icons_222222_256x240.png"); }
.ui-widget-header .ui-icon {background-image: image-url("jquery-ui/ui-icons_222222_256x240.png"); }
.ui-state-default .ui-icon { background-image: image-url("jquery-ui/ui-icons_888888_256x240.png"); }
.ui-state-hover .ui-icon, .ui-state-focus .ui-icon {background-image: image-url("jquery-ui/ui-icons_454545_256x240.png"); }
.ui-state-active .ui-icon {background-image: image-url("jquery-ui/ui-icons_454545_256x240.png"); }
.ui-state-highlight .ui-icon {background-image: image-url("jquery-ui/ui-icons_2e83ff_256x240.png"); }
.ui-state-error .ui-icon, .ui-state-error-text .ui-icon {background-image: image-url("jquery-ui/ui-icons_cd0a0a_256x240.png"); }

/* positioning */
.ui-icon-carat-1-n { background-position: 0 0; }
.ui-icon-carat-1-ne { background-position: -16px 0; }
.ui-icon-carat-1-e { background-position: -32px 0; }
.ui-icon-carat-1-se { background-position: -48px 0; }
.ui-icon-carat-1-s { background-position: -64px 0; }
.ui-icon-carat-1-sw { background-position: -80px 0; }
.ui-icon-carat-1-w { background-position: -96px 0; }
.ui-icon-carat-1-nw { background-position: -112px 0; }
.ui-icon-carat-2-n-s { background-position: -128px 0; }
.ui-icon-carat-2-e-w { background-position: -144px 0; }
.ui-icon-triangle-1-n { background-position: 0 -16px; }
.ui-icon-triangle-1-ne { background-position: -16px -16px; }
.ui-icon-triangle-1-e { background-position: -32px -16px; }
.ui-icon-triangle-1-se { background-position: -48px -16px; }
.ui-icon-triangle-1-s { background-position: -64px -16px; }
.ui-icon-triangle-1-sw { background-position: -80px -16px; }
.ui-icon-triangle-1-w { background-position: -96px -16px; }
.ui-icon-triangle-1-nw { background-position: -112px -16px; }
.ui-icon-triangle-2-n-s { background-position: -128px -16px; }
.ui-icon-triangle-2-e-w { background-position: -144px -16px; }
.ui-icon-arrow-1-n { background-position: 0 -32px; }
.ui-icon-arrow-1-ne { background-position: -16px -32px; }
.ui-icon-arrow-1-e { background-position: -32px -32px; }
.ui-icon-arrow-1-se { background-position: -48px -32px; }
.ui-icon-arrow-1-s { background-position: -64px -32px; }
.ui-icon-arrow-1-sw { background-position: -80px -32px; }
.ui-icon-arrow-1-w { background-position: -96px -32px; }
.ui-icon-arrow-1-nw { background-position: -112px -32px; }
.ui-icon-arrow-2-n-s { background-position: -128px -32px; }
.ui-icon-arrow-2-ne-sw { background-position: -144px -32px; }
.ui-icon-arrow-2-e-w { background-position: -160px -32px; }
.ui-icon-arrow-2-se-nw { background-position: -176px -32px; }
.ui-icon-arrowstop-1-n { background-position: -192px -32px; }
.ui-icon-arrowstop-1-e { background-position: -208px -32px; }
.ui-icon-arrowstop-1-s { background-position: -224px -32px; }
.ui-icon-arrowstop-1-w { background-position: -240px -32px; }
.ui-icon-arrowthick-1-n { background-position: 0 -48px; }
.ui-icon-arrowthick-1-ne { background-position: -16px -48px; }
.ui-icon-arrowthick-1-e { background-position: -32px -48px; }
.ui-icon-arrowthick-1-se { background-position: -48px -48px; }
.ui-icon-arrowthick-1-s { background-position: -64px -48px; }
.ui-icon-arrowthick-1-sw { background-position: -80px -48px; }
.ui-icon-arrowthick-1-w { background-position: -96px -48px; }
.ui-icon-arrowthick-1-nw { background-position: -112px -48px; }
.ui-icon-arrowthick-2-n-s { background-position: -128px -48px; }
.ui-icon-arrowthick-2-ne-sw { background-position: -144px -48px; }
.ui-icon-arrowthick-2-e-w { background-position: -160px -48px; }
.ui-icon-arrowthick-2-se-nw { background-position: -176px -48px; }
.ui-icon-arrowthickstop-1-n { background-position: -192px -48px; }
.ui-icon-arrowthickstop-1-e { background-position: -208px -48px; }
.ui-icon-arrowthickstop-1-s { background-position: -224px -48px; }
.ui-icon-arrowthickstop-1-w { background-position: -240px -48px; }
.ui-icon-arrowreturnthick-1-w { background-position: 0 -64px; }
.ui-icon-arrowreturnthick-1-n { background-position: -16px -64px; }
.ui-icon-arrowreturnthick-1-e { background-position: -32px -64px; }
.ui-icon-arrowreturnthick-1-s { background-position: -48px -64px; }
.ui-icon-arrowreturn-1-w { background-position: -64px -64px; }
.ui-icon-arrowreturn-1-n { background-position: -80px -64px; }
.ui-icon-arrowreturn-1-e { background-position: -96px -64px; }
.ui-icon-arrowreturn-1-s { background-position: -112px -64px; }
.ui-icon-arrowrefresh-1-w { background-position: -128px -64px; }
.ui-icon-arrowrefresh-1-n { background-position: -144px -64px; }
.ui-icon-arrowrefresh-1-e { background-position: -160px -64px; }
.ui-icon-arrowrefresh-1-s { background-position: -176px -64px; }
.ui-icon-arrow-4 { background-position: 0 -80px; }
.ui-icon-arrow-4-diag { background-position: -16px -80px; }
.ui-icon-extlink { background-position: -32px -80px; }
.ui-icon-newwin { background-position: -48px -80px; }
.ui-icon-refresh { background-position: -64px -80px; }
.ui-icon-shuffle { background-position: -80px -80px; }
.ui-icon-transfer-e-w { background-position: -96px -80px; }
.ui-icon-transferthick-e-w { background-position: -112px -80px; }
.ui-icon-folder-collapsed { background-position: 0 -96px; }
.ui-icon-folder-open { background-position: -16px -96px; }
.ui-icon-document { background-position: -32px -96px; }
.ui-icon-document-b { background-position: -48px -96px; }
.ui-icon-note { background-position: -64px -96px; }
.ui-icon-mail-closed { background-position: -80px -96px; }
.ui-icon-mail-open { background-position: -96px -96px; }
.ui-icon-suitcase { background-position: -112px -96px; }
.ui-icon-comment { background-position: -128px -96px; }
.ui-icon-person { background-position: -144px -96px; }
.ui-icon-print { background-position: -160px -96px; }
.ui-icon-trash { background-position: -176px -96px; }
.ui-icon-locked { background-position: -192px -96px; }
.ui-icon-unlocked { background-position: -208px -96px; }
.ui-icon-bookmark { background-position: -224px -96px; }
.ui-icon-tag { background-position: -240px -96px; }
.ui-icon-home { background-position: 0 -112px; }
.ui-icon-flag { background-position: -16px -112px; }
.ui-icon-calendar { background-position: -32px -112px; }
.ui-icon-cart { background-position: -48px -112px; }
.ui-icon-pencil { background-position: -64px -112px; }
.ui-icon-clock { background-position: -80px -112px; }
.ui-icon-disk { background-position: -96px -112px; }
.ui-icon-calculator { background-position: -112px -112px; }
.ui-icon-zoomin { background-position: -128px -112px; }
.ui-icon-zoomout { background-position: -144px -112px; }
.ui-icon-search { background-position: -160px -112px; }
.ui-icon-wrench { background-position: -176px -112px; }
.ui-icon-gear { background-position: -192px -112px; }
.ui-icon-heart { background-position: -208px -112px; }
.ui-icon-star { background-position: -224px -112px; }
.ui-icon-link { background-position: -240px -112px; }
.ui-icon-cancel { background-position: 0 -128px; }
.ui-icon-plus { background-position: -16px -128px; }
.ui-icon-plusthick { background-position: -32px -128px; }
.ui-icon-minus { background-position: -48px -128px; }
.ui-icon-minusthick { background-position: -64px -128px; }
.ui-icon-close { background-position: -80px -128px; }
.ui-icon-closethick { background-position: -96px -128px; }
.ui-icon-key { background-position: -112px -128px; }
.ui-icon-lightbulb { background-position: -128px -128px; }
.ui-icon-scissors { background-position: -144px -128px; }
.ui-icon-clipboard { background-position: -160px -128px; }
.ui-icon-copy { background-position: -176px -128px; }
.ui-icon-contact { background-position: -192px -128px; }
.ui-icon-image { background-position: -208px -128px; }
.ui-icon-video { background-position: -224px -128px; }
.ui-icon-script { background-position: -240px -128px; }
.ui-icon-alert { background-position: 0 -144px; }
.ui-icon-info { background-position: -16px -144px; }
.ui-icon-notice { background-position: -32px -144px; }
.ui-icon-help { background-position: -48px -144px; }
.ui-icon-check { background-position: -64px -144px; }
.ui-icon-bullet { background-position: -80px -144px; }
.ui-icon-radio-off { background-position: -96px -144px; }
.ui-icon-radio-on { background-position: -112px -144px; }
.ui-icon-pin-w { background-position: -128px -144px; }
.ui-icon-pin-s { background-position: -144px -144px; }
.ui-icon-play { background-position: 0 -160px; }
.ui-icon-pause { background-position: -16px -160px; }
.ui-icon-seek-next { background-position: -32px -160px; }
.ui-icon-seek-prev { background-position: -48px -160px; }
.ui-icon-seek-end { background-position: -64px -160px; }
.ui-icon-seek-start { background-position: -80px -160px; }
/* ui-icon-seek-first is deprecated, use ui-icon-seek-start instead */
.ui-icon-seek-first { background-position: -80px -160px; }
.ui-icon-stop { background-position: -96px -160px; }
.ui-icon-eject { background-position: -112px -160px; }
.ui-icon-volume-off { background-position: -128px -160px; }
.ui-icon-volume-on { background-position: -144px -160px; }
.ui-icon-power { background-position: 0 -176px; }
.ui-icon-signal-diag { background-position: -16px -176px; }
.ui-icon-signal { background-position: -32px -176px; }
.ui-icon-battery-0 { background-position: -48px -176px; }
.ui-icon-battery-1 { background-position: -64px -176px; }
.ui-icon-battery-2 { background-position: -80px -176px; }
.ui-icon-battery-3 { background-position: -96px -176px; }
.ui-icon-circle-plus { background-position: 0 -192px; }
.ui-icon-circle-minus { background-position: -16px -192px; }
.ui-icon-circle-close { background-position: -32px -192px; }
.ui-icon-circle-triangle-e { background-position: -48px -192px; }
.ui-icon-circle-triangle-s { background-position: -64px -192px; }
.ui-icon-circle-triangle-w { background-position: -80px -192px; }
.ui-icon-circle-triangle-n { background-position: -96px -192px; }
.ui-icon-circle-arrow-e { background-position: -112px -192px; }
.ui-icon-circle-arrow-s { background-position: -128px -192px; }
.ui-icon-circle-arrow-w { background-position: -144px -192px; }
.ui-icon-circle-arrow-n { background-position: -160px -192px; }
.ui-icon-circle-zoomin { background-position: -176px -192px; }
.ui-icon-circle-zoomout { background-position: -192px -192px; }
.ui-icon-circle-check { background-position: -208px -192px; }
.ui-icon-circlesmall-plus { background-position: 0 -208px; }
.ui-icon-circlesmall-minus { background-position: -16px -208px; }
.ui-icon-circlesmall-close { background-position: -32px -208px; }
.ui-icon-squaresmall-plus { background-position: -48px -208px; }
.ui-icon-squaresmall-minus { background-position: -64px -208px; }
.ui-icon-squaresmall-close { background-position: -80px -208px; }
.ui-icon-grip-dotted-vertical { background-position: 0 -224px; }
.ui-icon-grip-dotted-horizontal { background-position: -16px -224px; }
.ui-icon-grip-solid-vertical { background-position: -32px -224px; }
.ui-icon-grip-solid-horizontal { background-position: -48px -224px; }
.ui-icon-gripsmall-diagonal-se { background-position: -64px -224px; }
.ui-icon-grip-diagonal-se { background-position: -80px -224px; }


/* Misc visuals
----------------------------------*/

/* Corner radius */
.ui-corner-all, .ui-corner-top, .ui-corner-left, .ui-corner-tl { -moz-border-radius-topleft: 4px; -webkit-border-top-left-radius: 4px; -khtml-border-top-left-radius: 4px; border-top-left-radius: 4px; }
.ui-corner-all, .ui-corner-top, .ui-corner-right, .ui-corner-tr { -moz-border-radius-topright: 4px; -webkit-border-top-right-radius: 4px; -khtml-border-top-right-radius: 4px; border-top-right-radius: 4px; }
.ui-corner-all, .ui-corner-bottom, .ui-corner-left, .ui-corner-bl { -moz-border-radius-bottomleft: 4px; -webkit-border-bottom-left-radius: 4px; -khtml-border-bottom-left-radius: 4px; border-bottom-left-radius: 4px; }
.ui-corner-all, .ui-corner-bottom, .ui-corner-right, .ui-corner-br { -moz-border-radius-bottomright: 4px; -webkit-border-bottom-right-radius: 4px; -khtml-border-bottom-right-radius: 4px; border-bottom-right-radius: 4px; }

/* Overlays */
.ui-widget-overlay { background: #aaaaaa image-url("jquery-ui/ui-bg_flat_0_aaaaaa_40x100.png) 50% 50% repeat-x; opacity: .30;filter:Alpha(Opacity=30"); }
.ui-widget-shadow { margin: -8px 0 0 -8px; padding: 8px; background: #aaaaaa image-url("jquery-ui/ui-bg_flat_0_aaaaaa_40x100.png) 50% 50% repeat-x; opacity: .30;filter:Alpha(Opacity=30"); -moz-border-radius: 8px; -khtml-border-radius: 8px; -webkit-border-radius: 8px; border-radius: 8px; }/*
 * jQuery UI Tabs 1.8.16
 *
 * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Tabs#theming
 */
.ui-tabs { position: relative; padding: .2em; zoom: 1; } /* position: relative prevents IE scroll bug (element with position: relative inside container with overflow: auto appear as "fixed") */
.ui-tabs .ui-tabs-nav { margin: 0; padding: .2em .2em 0; }
.ui-tabs .ui-tabs-nav li { list-style: none; float: left; position: relative; top: 1px; margin: 0 .2em 1px 0; border-bottom: 0 !important; padding: 0; white-space: nowrap; }
.ui-tabs .ui-tabs-nav li a { float: left; padding: .5em 1em; text-decoration: none; }
.ui-tabs .ui-tabs-nav li.ui-tabs-selected { margin-bottom: 0; padding-bottom: 1px; }
.ui-tabs .ui-tabs-nav li.ui-tabs-selected a, .ui-tabs .ui-tabs-nav li.ui-state-disabled a, .ui-tabs .ui-tabs-nav li.ui-state-processing a { cursor: text; }
.ui-tabs .ui-tabs-nav li a, .ui-tabs.ui-tabs-collapsible .ui-tabs-nav li.ui-tabs-selected a { cursor: pointer; } /* first selector in group seems obsolete, but required to overcome bug in Opera applying cursor: text overall if defined elsewhere... */
.ui-tabs .ui-tabs-panel { display: block; border-width: 0; padding: 1em 1.4em; background: none; }
.ui-tabs .ui-tabs-hide { display: none !important; }

locale.rb

# config/initializers/locale.rb

ADDITIONAL_LOCALES = {
  :ru => 'Russian',
  :lt => 'Lithuanian'
}

news_item.rb

# app/models/news_item.rb

class NewsItem < ActiveRecord::Base

  translates :title, :body, :fallbacks_for_empty_translations => true
  accepts_nested_attributes_for :translations

  validates_presence_of :title, :body, :published_at

  after_save :create_missing_translations

  after_initialize do |news_item|
    if news_item.new_record?
      news_item.published_at ||= Time.zone.now
    end
  end

  def self.recent(number = 3)
    order(:published_at.desc).limit(number)
  end

protected

  def create_missing_translations
    ADDITIONAL_LOCALES.each do |lang|
      t = translations.find_by_locale(lang[0].to_s)
      if t.nil?
        translations.create(:locale => lang[0].to_s)
      end
    end
  end

end

news_items.rb

# app/admin/news_items.rb

ActiveAdmin.register NewsItem, { :sort_order => :published_at_desc } do

  menu :label => 'News', :parent => 'Content'

  filter :title
  filter :body
  filter :published_at

  index do
    column :title
    column :body, :sortable => false do |news_item|
      truncate(news_item.body, :length => 150)
    end
    column :published_at
    default_actions
  end

  form :partial => 'form'

  controller do
    def new
      @news_item = NewsItem.new
      ADDITIONAL_LOCALES.each do |lang|
        @news_item.translations.find_or_initialize_by_locale(lang[0]) unless lang[0] == :en
      end
    end
  end

  sidebar :help, :partial => 'admin/shared/help_sidebar'

end