以documentations为基础.Exists可以有4个参数:
exists:table,id,where,0
The question is, What if I wanted it to be where is not. Like where is not 0.
$validator = Validator::make(
array(
'groups' => $groups
),
array(
'groups' => 'required|exists:groups,jid,parent,!=,0'
)
);
You can use something like this:
Validator::extend('not_exists', function($attribute, $value, $parameters)
{
return DB::table($parameters[0])
->where($parameters[1], '=', $value)
->andWhere($parameters[2], '<>', $value)
->count()<1;
});