Yii2 Bootstrap 3
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<?php
/**
* UniqueValidator class file.
*
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2012 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\validators;
/**
* CUniqueValidator validates that the attribute value is unique in the corresponding database table.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class UniqueValidator extends Validator
{
/**
* @var boolean whether the comparison is case sensitive. Defaults to true.
* Note, by setting it to false, you are assuming the attribute type is string.
*/
public $caseSensitive = true;
/**
* @var boolean whether the attribute value can be null or empty. Defaults to true,
* meaning that if the attribute is empty, it is considered valid.
*/
public $allowEmpty = true;
/**
* @var string the yii\db\ActiveRecord class name or alias of the class
* that should be used to look for the attribute value being validated.
* Defaults to null, meaning using the class of the object currently
* being validated.
* @see attributeName
*/
public $className;
/**
* @var string the ActiveRecord class attribute name that should be
* used to look for the attribute value being validated. Defaults to null,
* meaning using the name of the attribute being validated.
* @see className
*/
public $attributeName;
/**
* @var \yii\db\ActiveQuery additional query criteria. This will be
* combined with the condition that checks if the attribute value exists
* in the corresponding table column.
*/
public $query = null;
/**
* @var string the user-defined error message. The placeholders "{attribute}" and "{value}"
* are recognized, which will be replaced with the actual attribute name and value, respectively.
*/
public $message;
/**
* @var boolean whether this validation rule should be skipped if when there is already a validation
* error for the current attribute. Defaults to true.
*/
public $skipOnError = true;
/**
* Validates the attribute of the object.
* If there is any error, the error message is added to the object.
* @param \yiiunit\data\ar\ActiveRecord $object the object being validated
* @param string $attribute the attribute being validated
*
* @throws \yii\base\Exception if table doesn't have column specified
*/
public function validateAttribute($object, $attribute)
{
$value = $object->$attribute;
if ($this->allowEmpty && $this->isEmpty($value)) {
return;
}
$className = ($this->className === null) ? get_class($object) : \Yii::import($this->className);
$attributeName = ($this->attributeName === null) ? $attribute : $this->attributeName;
$table = $object::getMetaData()->table;
if (($column = $table->getColumn($attributeName)) === null) {
throw new \yii\base\Exception('Table "' . $table->name . '" does not have a column named "' . $attributeName . '"');
}
$finder = $object::find();
$finder->where($this->caseSensitive ? "{$column->quotedName}=:value" : "LOWER({$column->quotedName})=LOWER(:value)");
$finder->params(array(':value' => $value));
if ($this->query instanceof \yii\db\BaseQuery) {
$finder->mergeWith($this->query);
}
if ($object->getIsNewRecord()) {
// if current $object isn't in the database yet then it's OK just
// to call exists()
$exists = $finder->exists();
} else {
// if current $object is in the database already we can't use exists()
$finder->limit(2);
$objects = $finder->all();
$n = count($objects);
if ($n === 1) {
if ($column->isPrimaryKey) {
// primary key is modified and not unique
$exists = $object->getOldPrimaryKey() != $object->getPrimaryKey();
} else {
// non-primary key, need to exclude the current record based on PK
$exists = array_shift($objects)->getPrimaryKey() != $object->getOldPrimaryKey();
}
} else {
$exists = $n > 1;
}
}
if ($exists) {
$message = ($this->message !== null) ? $this->message : \Yii::t('yii', '{attribute} "{value}" has already been taken.');
$this->addError($object, $attribute, $message, array('{value}' => $value));
}
}
}