Hey fellow Laravel developers! Today, let's dive into two powerful methods available in Laravel's Eloquent ORM: whereIn and whereNotIn. These methods provide a convenient way to filter query results based on a list of values.

whereIn allows you to filter your query results by matching values present in an array or a collection. It's perfect for scenarios where you want to fetch records that match any of the provided values. Here's an example:

$desiredRoles = ['admin', 'editor', 'contributor'];

$users = User::whereIn('role', $desiredRoles)->get();

// This will retrieve all users who have 'admin', 'editor', or 'contributor' roles

💡 In the above example, we use the whereIn method on the User model, specifying the column (role) and the array of desired roles we want to match against. Laravel will automatically generate a query that fetches users with any of the roles in the provided array.

👉 On the other hand, whereNotIn helps you exclude records that match any of the given values. It's handy when you want to retrieve results that do not fall within a specific set of values. Check out this example:

$undesiredStatuses = ['banned', 'inactive'];

$posts = Post::whereNotIn('status', $undesiredStatuses)->get();

// This will fetch all posts that are not 'banned' or 'inactive'

💡 In the above snippet, we apply the whereNotIn method on the Post model, specifying the column (status) and the array of undesired statuses. Laravel will generate a query to retrieve posts whose status does not match any of the values in the provided array.