[soyuka]

Q	A
Branch?	5.0
Tickets	Closes #8494
License	MIT
Doc PR

With write_uri_variable on a ReadLinkParameterProvider link, the uri variable holds the resolved resource. The ORM and ODM links handlers bound it as a query parameter, so any Doctrine-backed link failed with Object of class ...Company could not be converted to string.

The links handlers now read the link's identifiers off the resource when the uri variable is an instance of the link's class. Composite identifiers expand in place, so the positional consumption stays the same. getIdentifierValue() is untouched, and so is the processor: it never receives the resolved resource, because the controller passes uri variables by value.

The instanceof guard matters: uri variables are already objects for Uuid/Ulid identifiers (testGetRamseyUuidDummy goes 500 without it).

Eloquent is not part of this: Laravel doesn't register ReadLinkParameterProvider, so a resolved resource can't reach its links handler yet.