LazyInitializationException using patch add with Spring HATEOAS

Question

I have an ElementType object that has a EquipmentCodes set:

@Entity 
@Table(name = "ELEMENT_TYPES")
public class ElementType extends AbstractEntity<Long> {

@OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
@JoinColumn(name= "ELEM_TYPE_ID")
private Set<EquipmentCode> equipmentCodes;

}

I have both classes that display as Rest Rest resources with repositories:

@RepositoryRestResource(path = "elementTypes", collectionResourceRel = "elementTypes")
@Transactional
public interface ElementTypeRepository extends CrudRepository<ElementType, Long> {}

Now, if I try to perform some operations, for example

GET https: // localhost: 8080 / api / elementTypes / 40529090

or sending PATCH

{
   "equipmentCodes" : [
   "https://localhost:8080/api/equipmentCodes/40529100"
    ]
}

Everything seems to work fine if I try to add new hardware code to existing ones:

 [
    {
     "op": "add",
     "path": "/equipmentCodes",
     "value": [
       "https://localhost:8080/api/equipmentCodes/40529099"
    ]
    }
]

I get

org.hibernate.LazyInitializationException: failed to lazily initialize collections, failed to initialize proxies - without a session, with org.springframework.data.rest.webmvc.json.patch.JsonLateObjectEvaluator.evaluate (JsonLateObjectEvaluator.java:45)

, ? - , "" - Spring?

: , :

 [
    {
     "op": "add",
     "path": "/equipmentCodes",
     "value": "https://localhost:8080/api/equipmentCodes/40529099"
    }
]

, EquipmentCode 40529099 ElementType EquipmentCode (, https://localhost:8080/api/elementTypes/40529090), , ElementType

, EquipmentCode, , ElementType, EquipmentCodes .