yii初学，几个小问题求教

[q503959]

Internal Server Error

CDbConnection.connectionString cannot be empty.

An internal error occurred while the Web server was processing your request. Please contact the webmaster to report this problem.

Thank you.


①首先是连数据库，出现了以上错误，protected/config/main.php代码如下

return array(
	
		'db'=>array(
			'connectionString' => 'mysql:host=localhost;dbname=yii',
               'tablePrefix' =>'yii_',
               'emulatePrepare' => true,
               'username' => 'root',
               'password' => '',
               'charset' => 'utf8',

		)
		
);

controller里面一用$connection=Yii::app()->db;就出错，而用显式连接$connection=new CDbConnection('mysql:host=localhost;dbname=yii','root','');就没有问题

②model要引入？已经找遍了各种文档都没有说要引入的。。。。
我protected/models/DataModel.php里面代码如下

class DataModel extends CFormModel
{
	public $employeeId;
	public $firstName;
	public $lastName;
	public $title;
	public $address;
	public $email;
}

而controller里面$model=new DataModel();就报错如下

YiiBase::include(DataModel.php) [<a href='function.YiiBase-include'>function.YiiBase-include</a>]: failed to open stream: No such file or directory

An internal error occurred while the Web server was processing your request. Please contact the webmaster to report this problem.



顺便再求一下YII学习资料文档啊，网上找了好久都是没有入门级或者很繁琐的。因为工作问题，从THINKPHP转学YII，最近几天各种蛋疼，风格始终还没有适应过来

[yovinx]

'components' => array( 'db' => ..... )

[xiatsing]

楼上的没错 ，你把DB 那一坨 放到 'components' => array('db' => array('connectionString')) DB 是它的一个组件, 所有组件都写到这里面