**请注意:这是针对Laravel 4 **

** PLEASE TAKE NOTE: This is for Laravel 4 **

独特工作方式(在 laravel 4 中):

The way unique works (In laravel 4):

unique:{tableName},{columnName}

尝试

public static $rules = array(
    'UID' => 'required|unique:{tableName},uid|unique:{tableName},project_id'
);

**请注意:这是针对Laravel 4 ****

** PLEASE TAKE NOTE: This is for Laravel 4 ****