Laravel - Relationships - The Create Method

In addition to the save and saveMany methods, you may also use the create method, which accepts an array of attributes, creates a model, and inserts it into the database. The difference between save and create is that save accepts a full Eloquent model instance while create accepts a plain PHP array. The newly created model will be returned by the create method:

    use App\Models\Post;
    $post = Post::find(1);
    $comment = $post->comments()->create([
        'message' => 'A new comment.',

You may use the createMany method to create multiple related models:

    $post = Post::find(1);
        ['message' => 'A new comment.'],
        ['message' => 'Another new comment.'],

You may also use the findOrNew, firstOrNew, firstOrCreate, and updateOrCreate methods to create and update models on relationships.

Before using the create method, be sure to review the mass assignment documentation.