Embeddable relationships

[hrach]

No description provided.

[hrach]

The biggest question here is how to design immutable embeddables together with relationships, which are naturally mutable a lot and holds a state.

• introducing support only for one-sided relationships helps a lot; (M:1 – One-sided, M:M – One-sided and 1:1 – One-sided. )

Creating embeddable would take the same data-format as relationship's set method.

// M:1; Currency is entity with code as its primary key
$book->price = new Money(100, $currency); 
$book->price = new Money(100, 'czk');

// M:M
$book->labels = new Labels('now', $user, [$label1, $label2]);

The modification will be a little bit more complicated. How to remove one label?

[hrach]

The problem with M:M relationship - to correctly know what is added and what is removed. E.g. changing the property will reload current db state multiple times. If we delay this resolution to persistence phase, it would be loaded only once.