No uri to Entity translation when using @JsonCreator [DATAREST-993]

Benjamin Legendre opened DATAREST-993 and commented

It doesn't seems to be possible to make use of @JsonCreator with an argument of type "association entity", when this association is given in uri form on a POST request.

Simple example:

public class Parent {}

public class Child {

    private String name;

    @ManyToOne
    private Parent parent;

    @JsonCreator
    public Child ( @JsonProperty("name") String name, @JsonProperty("parent") Parent parent ) {
           this.name = name;
           this.parent = parent;
    }

}

When a POST request like this is sent:

POST /childs // or children?, this is only for example

{
      "name": "foo",
      "parent": "http://localhost/parents/1"
}

The error exception bellow is thrown:

2017-01-31 12:52:10.403 ERROR 28343 --- [ main] o.s.d.r.w.RepositoryRestExceptionHandler : Could not read document: Can not construct instance of org.project.Child: no String-argument constructor/factory method to deserialize from String value ('http://localhost/parents/1')

If not using @JsonCreator but by the way of traditionnal setters it works as expected (ie: the Parent entity is correctly set).

It seems there is some SDR internals @JsonDeserializers which are not applied when using @JsonCreator.

Affects: 2.5.6 (Hopper SR6), 2.6 GA (Ingalls)