Support primary key in API url, for record read, update and delete

[janblok]

Many rest API's have support for reading, updating and deletion based on the primary key in the API url.
Like:
http://localhost:8080/v1/rdbms/pgdb/film/42
instead of currently:
https://localhost:8080/v1/rdbms/pgdb/film?filter=id==42

While this works nicely API wise, there is one caveat related to composite primary keys, which could be resolved by ordering the primary key columns alphabetically in the url (to be separated by url friendly separator)
For example: http://localhost:8080/v1/rdbms/pgdb/theater/39;1023