Multiple/Default EntityGraphs

[JamesPeters98]

Hey! Is it currently possible to set the default entity graph and then have any DynamicEntityGraph's just add attributes on top of the default.

I have a scenario where I'd like certain fields in an Entity to always be Fetched and then be able to choose what other fields using the EntityGraph supplied!

[reda-alaoui]

Hey,

If you use Hibernate, since https://hibernate.atlassian.net/browse/HHH-8776, the concept of "default" EntityGraph defined by this extension is not needed anymore.
You can just rely on your Entity annotations fetch type and apply an EntityGraph of type LOAD javax.persistence.loadgraph.

Here is an example:

@Entity
class A {
  @OneToOne(fetchType = EAGER)
  private B b;

  @OneToOne(fetchType = LAZY)
  private C c;
}

// This will load b + c
aRepository.findById(1, new DynamicEntityGraph(LOAD, Collections.singletonList("c")));

[reda-alaoui]

From https://docs.oracle.com/javaee/7/tutorial/persistence-entitygraphs001.htm :

To specify a load graph, set the javax.persistence.loadgraph property when you execute an EntityManager.find or query operation. A load graph consists of the fields explicitly specified in the EntityGraph instance plus any fields in the default entity graph.

[JamesPeters98]

I had tried that but it doesn't work with Spring Boot and Spring Data which appears to just ignore FetchType Completely, that's why I'm using Entity Graphs in the first place