Eloquent save method associates the relation to the Model instance?

Question

I would like to know if after:

$post = Post::find(1);
$author = new Author($someData);
$post->author()->save($author);

the following code is lazy loading the author?

$authorName = $post->author->name;

To clarify Post an Author have a OneToOne relation.

If I use:

dump($post);

the output does not contain the author and shows this:

#relations: []

Same result using $post->author()->createMany() method

So I want to be sure it does not make an extra query to load the author since I have it in memory already.

laravel/framework: 5.4.*

Answer 1

You can do something like this if you really want to. You can use setRelation.

$post = Post::find(1);

$author = Author::create($someDataWithPostId); // save the author instance to the database.

$post->setRelation('author', $author); // set relation method will set the author as author relation.

Now when you access $authorName = $post->author->name; it will not load from the database since we have already set the author relation to the data to the post.

Answer 2

Try Eager Loading by with function example

$post= Model::with('author')->find(id);

then let your one To One Relational method Name is "author" in post model you can find it by dd($post->author->name)