Laravel Eloquent Relationships: Types & Examples

In Laravel, there are four types of relationships that you can use to define the way that different database tables are related to each other.

Here's an explanation of the different types of relationships in Laravel, along with examples of how to use them:

• One-to-One Relationships: This type of relationship is used when a single record in one table is related to a single record in another table. For example, if you have a User model and a Profile model, where each user has a single profile, you could define a one-to-one relationship like this:

        
class User extends Model
{
    public function profile()
    {
        return $this->hasOne(Profile::class);
    }
}

class Profile extends Model
{
    public function user()
    {
        return $this->belongsTo(User::class);
    }
}
        
      

With this relationship defined, you can easily retrieve a user's profile like this:

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

• One-to-Many Relationships: This type of relationship is used when a single record in one table is related to multiple records in another table. For example, if you have a User model and a Post model, where each user has many posts, you could define a one-to-many relationship like this: