By default, the MysqlAdapter will consider all columns of type tinyint(1) as boolean. If you wish to disable this emulation (which was the default behavior in versions 0.13.1 and earlier) you can add the following line to your environment.rb file:

ActiveRecord::ConnectionAdapters::MysqlAdapter.emulate_booleans = false

<div id="content" style="width:490px;height:490px; overflow: auto">
....  妳想要顯示的內容。
</div>

// 注意：以下程式碼使用 prototype.js 語法
$('content').onscroll = checkScroll;

// 注意：以下程式碼使用 prototype.js 物件
var opts = new Object;
opts.parameters = 'page=' + page_num;
opts.onComplete = showResponse;
var ajax = new Ajax.Request (url, opts);
page_num ++;

function showResponse(origReq) {
    $('content').innerHTML += origReq.responseText;
}

function showResponse(origReq) {
        var nav = $(this.nav.contentID);
        var last = nav.lastChild;
        while (last.nodeName != 'DIV') {
                last = last.previousSibling;
        }
        nav.removeChild (last);
        nav.innerHTML += origReq.responseText;
        nav.innerHTML += '<div style="background: #AAAAAA;">Fetching ... </div>';
        this.fetching = false;
}

function ScrollNav(contentID, url) {
        this.contentID = contentID;
        this.contentObj = $(contentID);
        this.contentObj.nav = this;  // 記錄目前物件，給 checkScroll 函式使用
        this.fetching = false;
        this.scrollTop = this.contentObj.scrollTop; // 記錄一開始 scrollTop
        this.scrollHeight = this.contentObj.scrollHeight; // 記錄一開始 scrollHeight
        this.url = url;

        this.idx = 0; // page number

        this.checkScroll = function() {
                if(this.nav.scrollTop == this.scrollTop)
                        return;
                if (this.fetching)
                        return;

                this.nav.scrollTop = this.scrollTop;
                if (this.scrollHeight == parseInt(this.style.height) + this.scrollTop) {
                        var opts = new Object;
                        opts.parameters = 'page=' + this.nav.idx;
                        opts.onComplete = showResponse.bind(this);

                        var ajax = new Ajax.Request(this.nav.url, opts);
                        this.fetching = true;
                        this.nav.idx ++;
                }
        }

        // 攔截 onscroll event
        this.contentObj.onscroll = this.checkScroll;
}

function init() {
        var nav = new ScrollNav('content', 'scroll_test.php');
        var nav = new ScrollNav('content2', 'scroll_test2.php');
}

1. 別吃光 browser 的記憶體了。塞資料時要設立停止點，別一直狂塞，吃光妳瀏覽器的記憶體了。
2. 不一定要拉動到最下方才開始抓取資料，可以在使用者的 scrollbar 接近最下方時，便向伺服器要求新資料，可以達到更順暢的操作。
   

class AdminController < ApplicationController
def do_login
if request.post?
user = User.login(params[:uid], params[:pwd])
if (user)
session[:user] = Marshal.dump(user)
end
end
end
end

class ApplicationController < ActionController::Base
model :user
def setup_variables
if (session[:user])
@login_user=Marshal.load(session[:user])
end
end
end

require 'json/lexer'
require 'json/objects'
module ActiveRecord
  module Json # :nodoc:
    DEFAULT_CONVERSIONS = { Time => [:to_s, :db] }
    def to_json(conversions = {})
      conversions = DEFAULT_CONVERSIONS.merge(conversions)
      self.attributes.keys.inject({}) do |hsh, key|
        value = self.send(key)
        hsh.merge(key => conversions[value.class] ? value.send(*conversions[value.class]) : value.to_s)
      end.to_json
    end
  end
end

require "#{RAILS_ROOT}/lib/active_record/json"
ActiveRecord::Base.class_eval { include ActiveRecord::Json }

user = User.new()
user.to_json()

def select_sp(sql, name = nil)
 rows = select(sql, name = nil)
 while (@connection.more_results?())
  @connection.next_result()
 end
 return rows
end

connection.select_sp ("CALL my_stored_proc();")

% ls -l po
drwxr-xr-x 2 root root 4096 2006-09-15 20:21 en
drwxr-xr-x 2 root root 4096 2006-09-15 21:21 ja
drwxr-xr-x 2 root root 4096 2006-09-15 20:21 zh_CN
drwxr-xr-x 2 root root 4096 2006-09-15 21:04 zh_TW

require(File.join(File.dirname(__FILE__), 'config', 'boot'))

require 'rake'
require 'rake/testtask'
require 'rake/rdoctask'

require 'tasks/rails'
require 'gettext/utils'

desc "Update pot/po files"
task :updatepo do
MY_APP_TEXT_DOMAIN = "sandbox" #sandbox 是我的 Textdomain, 你應該改成你自己的
MY_APP_VERSION = "sandbox 0.0.9"
GetText.update_pofiles(MY_APP_TEXT_DOMAIN,
Dir.glob("{app,lib}/**/*.{rb,rhtml}"),
MY_APP_VERSION)
end

desc "Create mo-files"
task :makemo do
GetText.create_mofiles(true, "po", "locale")
end

<%= _("This string should be localized") %>

<%= N_("This string should be localized") %>

require 'gettext/rails'
class ApplicationController < ActionController::Base
GetText.locale = "zh_TW"
init_gettext "sandbox"

• QUERY_STRING 中的 lang 參數設定。
• Cookie 中的 lang 參數設定。
• HTTP_ACCEPT_LANGUAGE 中的值。
• 你也可以透過 config/routes.rb 讓某路徑對應到特定語言中，例如 /login/zh_TW/hello/ 可以對應到 zh_TW 語言中。

ActionController::Routing::Routes.draw do |map|
map.connect ':controller/:lang/:action/:id'
end

• Ruby-Gettext-Package
• Using Gettext To Translate Your Rails Application (y)
• Ruby-GetText-Package HOWTO for Ruby on Rails