Thursday, April 22, 2010

Quick add multiple language to extjs + grails application

Recently we quick added multiple language to our application. To see demo, you can login @ www.feyasoft.com/main

1: In database, we create a table which hold on the setting for language.

2: In grail MainController file, add the following code:

/**
* Copyright (c) 2005 - 2010 FeyaSoft Inc. All Rights Reserved.
*/
import grails.converters.*

class MainController extends GeneralController {

def index = {
// get login user id
User loginUser = getLoginUser()
if (loginUser == null) {
def json = [failure : "true", errorInfo : "Please login before post"]
render json as JSON
}

def item = UserSetting.findByAuthor(loginUser);
def lang = 'en'
if (item) lang = item.language;

render(view: 'main', model: [lang: lang])
}
}

3: In main.gsp file, the following code are added, really simple:

<~g:javascript library="extjs/src/locale/ext-lang-${lang}" /~>
<~g:javascript library="feyaSoft/lang/${lang}" /~>
And you need create the related lang file now. For example, we have this lang file under my folder: web-app\js\feyaSoft\lang\en.js

/**
* FeyaSoft Online MyActivity
* Copyright(c) 2006-2010, FeyaSoft Inc. All right reserved.
* info@feyasoft.com
*/
Ext.ns("feyaSoft");

feyaSoft.lang = {

'common':{
'accessories': 'Accessories',
'align': 'Align',
'average': 'Average',
'brush': 'Brush',
'calculate': 'Calculate',
....}
...
}

4: Now you can use something like this in your JS file:

feyaSoft.lang.common['average']
And you are on fly now.

Sunday, April 18, 2010

UTF-8 setting in Grails, mysql

Client UTF8----(A)---->
Server UTF8 ----(B)---->
Database UTF8 --- (C)---->
Table UTF8 ---(D)----> Row UTF8

1: Client UTF8

<~meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

2: Server UTF8

In DataSource.groovy

url = "jdbc:mysql://localhost:3306/home?tcpKeepAlive=true&useUnicode=true&characterEncoding=UTF8"
This forces the driver to recognize that all text being sent to the driver is in UTF8. This should conform directly with Java's default UTF8 encoding without any translations occurring.

3: Database UTF8

mysql> show variables like '%character%';

+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)

mysql> set global character_set_server=utf8;
be sure to include the option in your my.cnf to ensure this option is persisted for a mysqld restart.

/etc/mysql/my.conf - default-character-set = utf8