Error when trying to map a Set type object (Property access method and JPA annotation) not duplicated tho

问题

In order to accomplish another task, I need redefine my pojos classes and use property access to take advantage of JavaFX properties in my mentioned classes, but I'm facing this error.

org.hibernate.MappingException: Could not determine type for: java.util.Set, at table: deposito, for columns: [org.hibernate.mapping.Column(productoses)]

I have already tryied the solutions mentioned in org.hibernate.MappingException: Could not determine type for: java.util.Set and org.hibernate.MappingException: Could not determine type for: java.util.List but still can't make it work.

Here is my OneToMany entity class and here is my ManyToOne class.

And this is the stacktrace.

org.hibernate.MappingException: Could not determine type for: java.util.Set, at table: deposito, for columns: [org.hibernate.mapping.Column(productoses)]
    at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:455)
    at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:422)
    at org.hibernate.mapping.Property.isValid(Property.java:226)
    at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:597)
    at org.hibernate.mapping.RootClass.validate(RootClass.java:265)
    at org.hibernate.boot.internal.MetadataImpl.validate(MetadataImpl.java:329)
    at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:451)
    at org.hibernate.boot.internal.MetadataImpl.buildSessionFactory(MetadataImpl.java:170)
    at ajfmo.inventario.utils.HibernateUtil.getSessionFactory(HibernateUtil.java:19)
    at ajfmo.inventario.DAO.ProductDAO.<init>(ProductDAO.java:20)
    at ajfmo.inventario.view.MainView.<init>(MainView.java:60)

Edit

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This is my HibernateUtil class. This one is the DAO that appears in the stack trace.

---

Thank you in advance, this is my first project using hibernate... Or my first project at all indeed.

回答1:

In your Deposito class I see that your JPA annotation is on the property and not on the getter like everywhere else in the class (I doubt this is your problem, but maybe a good idea to be consistent)

And here you have:

@OneToMany(fetch = FetchType.LAZY, mappedBy = "deposito")
private Set<Productos> productoses = new HashSet<Productos>(0);

public Set<Productos> getProductoses() {
  return this.productoses;
}

In the Productos class you have:

private ObjectProperty<Deposito> deposito;
private Deposito _deposito;

@ManyToOne(fetch = FetchType.LAZY, cascade = CascadeType.PERSIST)
@JoinColumn(name = "deposito_producto", referencedColumnName = "descripcion_deposito", nullable = false)
public Deposito getDeposito() {
  if (deposito == null) {
    return _deposito;
  } else {
    return deposito.get();
  }
}

referencedColumnName = "descripcion_deposito" point to this method (which is probably not the one you intended):

@Column(name = "descripcion_deposito", unique = true, nullable = false, length = 45)
public String getDescripcionDeposito() {
  if (descripcionDeposito == null) {
    return _descripcionDeposito;
  } else {
    return descripcionDeposito.get();
  }
} 

I'm not sure exactly what your column names are, but the referencedColumnName should point to the primary/foreign key of the field of the Productos object, try this in the Productos class:

@ManyToOne(fetch = FetchType.LAZY, cascade = CascadeType.PERSIST)
@JoinColumn(name = "deposito_producto", referencedColumnName = "idDeposito", nullable = false)
public Deposito getDeposito() {
  if (deposito == null) {
    return _deposito;
  } else {
    return deposito.get();
  }
}

来源：https://stackoverflow.com/questions/48817905/error-when-trying-to-map-a-set-type-object-property-access-method-and-jpa-annot