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This article introduces the relevant knowledge of "how to achieve model association in Laravel". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

one-for-one

One-to-one association is the most basic connection that exists at present. This association means that A model can only be linked to B model, and vice versa. For example, a User model and a Passport model will become an one-to-one association. A user can only have one pass, similarly, a pass belongs to only one user.

Let's look at how to define this association in the code.

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