public function validateNamespace($attribute)
    {
        $value = $this->$attribute;
        $value = ltrim($value, '\\');
        $path = Yii::getAlias('@' . str_replace('\\', '/', $value), false);
        if ($path === false) {
            $this->addError($attribute, 'Namespace must be associated with an existing directory.');
        }
    }
public function validateNamespace($attribute)
    {
        $value = $this->$attribute;
        $value = ltrim($value, '\\');
        $path = Yii::getAlias('@' . str_replace('\\', '/', $value), false);
        if ($path === false) {
            $this->addError($attribute, 'Namespace must be associated with an existing directory.');
        }
    }
public function validateNamespace ( $ attribute ) { $ value = $ this -> $ attribute ; $ value = ltrim ( $ value , '\\' ) ; $ path = Yii :: getAlias ( '@' . str_replace ( '\\' , '/' , $ value ) , false ) ; if ( $ path === false ) { $ this -> addError ( $ attribute , 'Namespace must be associated with an existing directory.' ) ; } }
Validates the namespace.

@param string $attribute Namespace attribute name.
Validates the namespace .