How to create and use Eloquent relationships in Laravel

In Laravel, Eloquent relationships allow you to define relationships between different database tables using object-oriented syntax. There are several types of relationships in Eloquent, including:

1. One-to-One Relationship: Use when a model is related to another model with a one-to-one relationship.

2. One-to-Many Relationship: Use when a model is related to another model with a one-to-many relationship.

3. Many-to-Many Relationship: Use when a model is related to another model with a many-to-many relationship.

4. Has Many Through Relationship: Use when you need to access a remote table through another intermediate table.

5. Polymorphic Relationship: Use when a model can belong to more than one other type of model on a single association.

6. Many-to-Many Polymorphic Relationship: Use when you have a polymorphic many-to-many relationship.

Here's a brief guide on how to create and use Eloquent relationships in Laravel:

1. Define Models

php
// User.php
class User extends Model {
    public function posts() {
        return $this->hasMany('App\Post');
    }
}

// Post.php
class Post extends Model {
    public function user() {
        return $this->belongsTo('App\User');
    }
}

2. Use Relationships

php
// Create a new post for a user
$user = User::find(1);
$post = new Post(['title' => 'New Post']);
$user->posts()->save($post);

// Get all posts for a user
$posts = $user->posts;

// Get the user for a post
$user = $post->user;

=== Happy Coding :)