无法懒惰地加载JPA关系

Question

I'm working with Jhipster. I'm not being able to fetch Customers lazily.

I have made a JDL like so...

 PROPERTY
 id
 ...

 CUSTOMER
 id
 ...

 CUSTOMER_PROPERTY
 id
 customer_id
 property_id
 value

 relationship OneToMany {
    Customer to CustomerProperty                    
 }
 relationship ManyToOne {
    CustomerProperty to Property    
 }

My Domains

Customer.java

 @OneToMany(mappedBy = "customer", fetch = FetchType.LAZY)
 @Cache(usage = CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
 private Set<CustomerProperty> customerProperties = new HashSet<>();

Property.java no mapping

CustomerProperty.java

 @ManyToOne
 private Property property;

 @ManyToOne
 @JsonIgnoreProperties("customerProperties")
 private Customer customer;

I have already tried to explicit set fetch = FetchType.LAZY but it keeps bringing the full complete Customer object with all CustomerProperties List

I would like to understand why the fetch it's not working

Answer 1

Debugging is not a good mechanism for evaluation if a collection has been lazily loaded or not. The debugger itself may trigger initialization.

Instead of using debugger use the

org.hibernate.Hibernate.isInitialized(yourCollection) 

to verify if it has been initialized after the loading of your entity.

If this method return false but you still suspect that at later point the collection is initialize you should search the error in a possible subsequent call (somewhere else).