A new “one of many” Eloquent relationship is coming to Laravel 8.42 thanks a PR contribution by Lennart Carstens-Behrens along with collaboration from Taylor Otwell (and others) in framework pull request #37362 :
The one-of-many relationship creates a one-to-one association from a one-to-many relationship. For example, “latest login,” “first login,” and product pricing (i.e., get the latest published price for a product).
The implementation works by filtering the intersection of the relation joined on itself. A query example from the pull request helps illustrate how it works under the hood:
SELECT *
FROM `logins`
INNER JOIN (
SELECT MAX(id) AS id
FROM logins
GROUP BY logins.user_id
) AS latest_login
ON latest_login.id = logins.id
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