(78) What are the Relationship in Laravel | Why we use relations | One to one Relationship

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What are the Relationship in Laravel

A Guide On Laravel Relationships
All you need to know about setting up and querying relationships
Defining relationships in Laravel is something that every Laravel developer probably has done more than once. But there are a lot of issues that you can run into when trying to implement a relationship. Since there are different types of relationships, how do you know which one to pick? And how can you use the full potential of relationships when it comes to down to querying the models?

Laravel relationships can be kind of hard to wrap your head around. If you don’t fully understand how relationships in Laravel work at this point, don’t worry. After reading this article you should have a better grasp of it.

What relationship should I use?
To answer this question you first have to know what the available options are. There are three different types of relationships:

One to one
One to many
Many to many
We’ll go over the different types of relationships one by one and explain when to use them.

One to one
The one to one relationship is the most basic relation that exists. This type of relationship means that a model of type A may only be linked to one model of type B, and vice versa. For example, a relationship between a User model and a Passport model would be a one to one relationship. A user can only have one passport, and a passport only belongs to one user.

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