Cannot PATCH an entity, that has an enum set, to increase the number of enums, if 'enum traslation' is enabled [DATAREST-1139]

Sergei Poznanski opened DATAREST-1139 and commented

If an entity has an enum set property, and 'enum traslation' is enabled (spring.data.rest.enable-enum-translation=true), the trying to PATCH this entity, to increase a number of enums in the set, leads to an error:

Could not read payload!; nested exception is java.lang.IllegalStateException: Can only translate enum with property information!

If I update the enum set with the same number of enums (or less) then the entity is updated correctly.

PUT updates the enum set correctly in anyway.

If I turn off the 'enum traslation' then PATCH works as expected.

Example:

@Entity
public class User {

    private String name;

    @Enumerated(EnumType.STRING)
    @CollectionTable(name = "roles", joinColumns = @JoinColumn(name = "user_id"))
    @ElementCollection
    private Set<Role> roles;

    // other stuff 
}

public enum Role {
    ADMIN, USER, POWER_USER
}

Enum translation:

io.github.cepr0.enumtranslatingissue.Role.ADMIN=Admin
io.github.cepr0.enumtranslatingissue.Role.USER=User
io.github.cepr0.enumtranslatingissue.Role.POWER_USER=Power user

Error:

GET http://localhost:8080/api/users/1
{
    "name": "user1",
    "roles": [
        "Admin",
        "User"
    ],
    "_links": {
        "self": {
            "href": "http://localhost:8080/api/users/1"
        },
        "user": {
            "href": "http://localhost:8080/api/users/1"
        }
    }
}

PATCH http://localhost:8080/api/users/1
{
  "roles": [
          "Admin",
          "User",
          "Power user"
      ]
}

{
    "cause": {
        "cause": null,
        "message": "Can only translate enum with property information!"
    },
    "message": "Could not read payload!; nested exception is java.lang.IllegalStateException: Can only translate enum with property information!"
}

Demo project

Affects: 2.6.7 (Ingalls SR7)

Reference URL: https://stackoverflow.com/q/46103203