Document that composite identifier cannot use auto-generated properties

Description

The composite identifiers cannot use auto-generated properties. This needs to be documented as, otherwise, people will assume this behavior as illustrated by this StackOverflow question.

Environment

None

Status

Assignee

Vlad Mihalcea

Reporter

Vlad Mihalcea

Fix versions

Labels

None

backPortable

None

Suitable for new contributors

None

Requires Release Note

None

Pull Request

None

backportDecision

None

Components

Affects versions

5.3.7

Priority

Major