我想将 YII 框架与两个数据库连接，但它抛出 CDbConnection failed 数据库名称不正确

Question

我已经使用本教程将 YII 与两个数据库连接

我在protected/config/main.php添加了一个连接字符串，如下

'db2'=>array(
            'connectionString' => 'mysql:host=localhost;port=3306;dbname=db_name ',
            'emulatePrepare' => true,
            'username' => 'root',
            'password' => '',
            'charset' => 'utf8',
            'class' => 'CDbConnection'
    ),

我在下面创建了一个文件

protected/component/AltActiveRecord.php一个类文件，这个文件中的代码是

`

abstract class AltActiveRecord extends CActiveRecord
    {
        const BELONGS_TO='CBelongsToRelation';
        const HAS_ONE='CHasOneRelation';
        const HAS_MANY='CHasManyRelation';
        const MANY_MANY='CManyManyRelation';
        const STAT='CStatRelation';     
        public static $db2;

        private static $_models=array();            

        private $_md;                               
        private $_new=false;                        

        private $_attributes=array();               

        private $_related=array();                  

        private $_c;                                

        private $_pk;                               

        public function getDbConnection()
        {
            if(self::$db2!==null)
                return self::$db2;
            else
            {


                self::$db2 = new CDbConnection();
                foreach(Yii::app()->db2 as $key => $value)
                    self::$db2->$key = $value;



                if(self::$db2 instanceof CDbConnection)
                {
                self::$db2->setActive(true);
                return self::$db2;
            }
            else
                throw new CDbException(Yii::t('yii','Active Record requires a "db" CDbConnection application component.'));
            }
            }
            }
`

我创建了一个扩展到这个类的模型，并试图在控制器中创建这个模型的对象。 但它以一个错误结束，它说

CDbConnection failed to open the DB connection: SQLSTATE[HY000] [1102] Incorrect database name "db_name"

我想知道为什么这不起作用。 是和php版本还是yii版本有关

Answer 1

在您的连接字符串中，行尾（在db_name之后）有一个额外的空格：

'db2'=>array(
            'connectionString' => 'mysql:host=localhost;port=3306;dbname=db_name ',
            'emulatePrepare' => true,
            'username' => 'root',
            'password' => '',
            'charset' => 'utf8',
            'class' => 'CDbConnection'
    ),

应该：

'db2'=>array(
            'connectionString' => 'mysql:host=localhost;port=3306;dbname=db_name',
            'emulatePrepare' => true,
            'username' => 'root',
            'password' => '',
            'charset' => 'utf8',
            'class' => 'CDbConnection'
    ),