浏览 Laravel 文档、API 文档和源代码,我想知道是否有人知道id
以下唯一规则中的第四个参数的用途?
'email' => 'unique:users,email_address,NULL,id,account_id,1'
我目前对这条规则的理解是:
users
- 看这张表email_address
- 检查此列NULL
- 将是我们可以指定要忽略的主键/ID 值的地方,但我们没有打扰,所以这个参数基本上被忽略了id
-不确定account_id
- 附加 where 子句,这是列名1
-account_id
where 子句中的值
文档: http: //laravel.com/docs/4.2/validation
负责执行在线函数中的唯一规则验证\Illuminate\Validation\Validator
的函数:validateUnique($attribute, $value, $parameters)
949
/**
* Validate the uniqueness of an attribute value on a given database table.
*
* If a database column is not specified, the attribute will be used.
*
* @param string $attribute
* @param mixed $value
* @param array $parameters
* @return bool
*/
protected function validateUnique($attribute, $value, $parameters)
{
$this->requireParameterCount(1, $parameters, 'unique');
$table = $parameters[0];
// The second parameter position holds the name of the column that needs to
// be verified as unique. If this parameter isn't specified we will just
// assume that this column to be verified shares the attribute's name.
$column = isset($parameters[1]) ? $parameters[1] : $attribute;
list($idColumn, $id) = array(null, null);
if (isset($parameters[2]))
{
list($idColumn, $id) = $this->getUniqueIds($parameters);
if (strtolower($id) == 'null') $id = null;
}
// The presence verifier is responsible for counting rows within this store
// mechanism which might be a relational database or any other permanent
// data store like Redis, etc. We will use it to determine uniqueness.
$verifier = $this->getPresenceVerifier();
$extra = $this->getUniqueExtra($parameters);
return $verifier->getCount(
$table, $column, $value, $id, $idColumn, $extra
) == 0;
}
干杯