我有一个这样的表:(id,name,version,text)。(name, version) 是唯一键,我如何制定规则来验证这一点。
8 回答
这可以由 Yii 自己完成,不需要扩展。但是,扩展可以帮助清理rules()
此处描述的方法:
http://www.yiiframework.com/extension/unique-attributes-validator/
这是代码(从该站点复制),无需使用扩展即可工作:
public function rules() {
return array(
array('firstKey', 'unique', 'criteria'=>array(
'condition'=>'`secondKey`=:secondKey',
'params'=>array(
':secondKey'=>$this->secondKey
)
)),
);
}
如果 的值$this->secondKey
在 -method 中不可用,rules()
您可以在 CActiveRecords beforeValidate()
-method 中添加验证器,如下所示:
public function beforeValidate()
{
if (parent::beforeValidate()) {
$validator = CValidator::createValidator('unique', $this, 'firstKey', array(
'criteria' => array(
'condition'=>'`secondKey`=:secondKey',
'params'=>array(
':secondKey'=>$this->secondKey
)
)
));
$this->getValidatorList()->insertAt(0, $validator);
return true;
}
return false;
}
您不需要 rules() 方法的复杂内容,也不需要 3rd 方扩展。只需创建自己的验证方法。自己做会容易得多。
public function rules()
{
return array(
array('firstField', 'myTestUniqueMethod'),
);
}
public function myTestUniqueMethod($attribute,$params)
{
//... and here your own pure SQL or ActiveRecord test ..
// usage:
// $this->firstField;
// $this->secondField;
// SELECT * FROM myTable WHERE firstField = $this->firstField AND secondField = $this->secondField ...
// If result not empty ... error
if (!$isUnique)
{
$this->addError('firstField', "Text of error");
$this->addError('secondField', "Text of error");
}
}
Yii1:
http://www.yiiframework.com/extension/composite-unique-key-validatable/
Yii2:
// a1 needs to be unique
['a1', 'unique']
// a1 needs to be unique, but column a2 will be used to check the uniqueness of the a1 value
['a1', 'unique', 'targetAttribute' => 'a2']
// a1 and a2 need to be unique together, and they both will receive error message
[['a1', 'a2'], 'unique', 'targetAttribute' => ['a1', 'a2']]
// a1 and a2 need to be unique together, only a1 will receive error message
['a1', 'unique', 'targetAttribute' => ['a1', 'a2']]
// a1 needs to be unique by checking the uniqueness of both a2 and a3 (using a1 value)
['a1', 'unique', 'targetAttribute' => ['a2', 'a1' => 'a3']]
http://www.yiiframework.com/doc-2.0/yii-validators-uniquevalidator.html
他们在 Yii1.14rc 的下一个候选版本中添加了对唯一复合键的支持,但这里是(又一个)解决方案。顺便说一句,此代码在 Yii 框架将在下一个正式版本中使用的规则中使用相同的“attributeName”。
受保护的/模型/Mymodel.php
public function rules()
{
return array(
array('name', 'uniqueValidator','attributeName'=>array(
'name', 'phone_number','email')
),
...
- 规则开头的“名称”是验证错误将附加到的属性,稍后将在您的表单上输出。
- 'attributeName' (array) 包含一个键数组,您希望将它们作为组合键一起验证。
protected/components/validators/uniqueValidator.php
class uniqueValidator extends CValidator
{
public $attributeName;
public $quiet = false; //future bool for quiet validation error -->not complete
/**
* Validates the attribute of the object.
* If there is any error, the error message is added to the object.
* @param CModel $object the object being validated
* @param string $attribute the attribute being validated
*/
protected function validateAttribute($object,$attribute)
{
// build criteria from attribute(s) using Yii CDbCriteria
$criteria=new CDbCriteria();
foreach ( $this->attributeName as $name )
$criteria->addSearchCondition( $name, $object->$name, false );
// use exists with $criteria to check if the supplied keys combined are unique
if ( $object->exists( $criteria ) ) {
$this->addError($object,$attribute, $object->label() .' ' .
$attribute .' "'. $object->$attribute . '" has already been taken.');
}
}
}
您可以使用任意数量的属性,这将适用于您的所有 CModel。检查是用“存在”完成的。
保护/配置/main.php
'application.components.validators.*',
您可能需要将上面的行添加到您的配置中的 'import' 数组中,以便 Yii 应用程序可以找到 uniqueValidator.php。
非常欢迎积极的反馈和改变!
在 Yii2 中:
public function rules() {
return [
[['name'], 'unique', 'targetAttribute' => ['name', 'version']],
];
}
基于上面的函数,这里有一个可以添加到 ActiveRecord 模型中的函数
你会这样使用它,
array( array('productname,productversion'), 'ValidateUniqueColumns', 'Product already contains that version'),
/*
* Validates the uniqueness of the attributes, multiple attributes
*/
public function ValidateUniqueColumns($attributes, $params)
{
$columns = explode(",", $attributes);
//Create the SQL Statement
$select_criteria = "";
$column_count = count($columns);
$lastcolumn = "";
for($index=0; $index<$column_count; $index++)
{
$lastcolumn = $columns[$index];
$value = Yii::app()->db->quoteValue( $this->getAttribute($columns[$index]) );
$column_equals = "`".$columns[$index]."` = ".$value."";
$select_criteria = $select_criteria.$column_equals;
$select_criteria = $select_criteria." ";
if($index + 1 < $column_count)
{
$select_criteria = $select_criteria." AND ";
}
}
$select_criteria = $select_criteria." AND `".$this->getTableSchema()->primaryKey."` <> ".Yii::app()->db->quoteValue($this->getAttribute( $this->getTableSchema()->primaryKey ))."";
$SQL = " SELECT COUNT(`".$this->getTableSchema()->primaryKey."`) AS COUNT_ FROM `".$this->tableName()."` WHERE ".$select_criteria;
$list = Yii::app()->db->createCommand($SQL)->queryAll();
$total = intval( $list[0]["COUNT_"] );
if($total > 0)
{
$this->addError($lastcolumn, $params[0]);
return false;
}
return true;
}
这很容易。在您的数组中,包括在您的扩展类中创建的参数。
下一个代码在模型内部。
array('name', 'ext.ValidateNames', 'with'=>'lastname')
下一个代码是从类ValidateNames
到扩展文件夹。
class ValidateNames extends CValidator
{
public $with=""; /*my parameter*/
public function validateAttribute($object, $attribute)
{
$temp = $this->with;
$lastname = $object->$temp;
$name = $object->$attribute;
$this->addError($object,$attribute, $usuario." hola ".$lastname);
}
}
也许您可以将其添加rules
到您的代码中
return array(
array('name', 'unique', 'className'=>'MyModel', 'attributeName'=>'myName'),
array('version', 'unique', 'className'=>'MyModel', 'attributeName'=>'myVersion')
);