What is Relation In Laravel with Example

In this tutorial we will learn what is relation in laravel with example.

What is Relation In Laravel with Example

In Laravel, a relation refers to the association between two database tables. It allows you to define how two tables are related to each other and retrieve data from them in a structured and efficient way.

There are several types of relations in Laravel, including:

1. One-to-One: In this type of relation, each record in one table is associated with only one record in another table. For example, a user may have one profile.

2. One-to-Many: In this type of relation, each record in one table can be associated with many records in another table. For example, a user can have many posts.

3. Many-to-Many: In this type of relation, multiple records in one table can be associated with multiple records in another table. For example, a user can have many roles, and a role can belong to many users.

Here's an example of a one-to-many relationship between the User and Post models in Laravel:

// User Model
class User extends Model
{
    /**
     * Get the posts for the user.
     */
    public function posts()
    {
        return $this->hasMany(Post::class);
    }
}

// Post Model
class Post extends Model
{
    /**
     * Get the user that owns the post.
     */
    public function user()
    {
        return $this->belongsTo(User::class);
    }
}

With this relationship defined, you can easily retrieve all posts for a user:

$user = User::find(1);
$posts = $user->posts;

Or retrieve the user who owns a specific post:

$post = Post::find(1);
$user = $post->user;