Globalize3 support with tabs in Active Admin

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

Kevin could you put/show file 'admin/shared/wysiwyg_options', thank you.

Sure, I've updated the gist to include that file.

This is awesome Kevin, you just saved me a few hours. Thanks a lot.

currently had few problems (rails 3.2.8)
= f.buttons -> = f.actions
and something wrong with mass-assign of :locale. found only
config.active_record.whitelist_attributes = false
but i think it's not the best solution.

Issue with mass-assignment may be solved this way:

class NewsItem < ActiveRecord::Base
  class Translation
    attr_accessible :locale
  end
end

Nice! Thanks for sharing this. There's an index variable on the form partial view that is not used anymore.

Kevin, any particular reason you haven't released this as a gem ? I didn't see it anywhere.

Might look stupid to ask but is there any way to translate a file input? for example if I have a pub model and I want to be able to upload an image in french and in english since the text on it has to be translated. At the moment I use "mount_uploader :image, ImageUploader", it works for the default language field but the translation tab only show a text input... Thanks

what wysiwyg editor is being used?