How to validate a pair of values ​​from several tables for uniqueness?

Question

Laravel

Hello.
For example, there is a users table and a groups table .
users : id, name, email.
groups : id, name, slug.
How to set up validation to check and prevent user registration with the same email , within a group (name from groups).
That is, users can register with the same email multiple times, but the users.email and groups.name pair must be unique.
Thank you!

Answer 1

Most likely, you should have a group_id column in your users table to link a user to a group.
In this case, the rule is:

'email' => Rule::unique('users')->where('group_id',  $request->input('group_id'))