Laravel 9 - How to handle unique validation for multiple fields with conditional rules?
I'm building a feature where I'm working on a Laravel 9 application where I need to validate a form that requires unique constraints on two fields, but the uniqueness rules should depend on another field's value. Specifically, I have a 'users' table with 'email', 'username', and a 'role' field. For users with the role 'admin', both 'email' and 'username' need to be unique across the table; however, for users without the 'admin' role, only 'username' should be unique, while 'email' can be duplicated. I've tried using the `unique` validation rule in my request class, but I'm struggling with how to conditionally apply the rules based on the 'role'. Here's what I have so far: ```php public function rules() { $rules = []; $rules['username'] = 'required|string|max:255|unique:users'; $rules['email'] = 'required|email|max:255'; if ($this->role === 'admin') { $rules['email'] .= '|unique:users'; } return $rules; } ``` The above logic seems to be straightforward, but when I try to submit the form with an existing email for a user who is not an admin, it still throws a validation behavior for the email field. I suspect it's because the unique rule is always being applied, regardless of the role. Can anyone guide me on how to correctly set these conditional validation rules? I've also checked the Laravel documentation, but it doesn't cover this specific scenario clearly. Any help would be appreciated! This is for a desktop app running on Linux. I'd be grateful for any help. Any advice would be much appreciated.