I'm having an issue with JPA. Basically, what I have is an entity with a list of an abstract type and I need each element of the list to be persisted in its corresponding table with a foreign key to relate to the entity container. Here is the code:
Code:
@Entity(name = "container")
public class Container{
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id")
private BigInteger id;
@OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
@JoinColumn(name="container_id", referencedColumnName="id")
private List<AbstractType> types;
}
Abstract type:
Code:
@Entity
@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)
public abstract class AbstractType{
@Id
@GeneratedValue(strategy = GenerationType.TABLE)
private BigInteger id;
private String someProp;
@Column(name="container_id")
private BigInteger containerId;
}
Type A:
Code:
@Entity(name = "type_a")
@Transactional
@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)
public class TypeA extends AbstractType{
private String prop1;
private String prop2;
}
Type B:
Code:
@Entity(name = "type_b")
@Transactional
@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)
public class TypeB extends AbstractType{
private String prop3;
private String prop4;
}
I'm having a SQL error. The generated query tries to update the table of the abstract type (which shouldnt exist). This is part of the query:
Code:
update hibernate_sequences set sequence_next_hi_value = ? where
sequence_next_hi_value = ? and sequence_name = 'abstract_type'
insert into type_a (some_prop, entity_id, prop1, prop2) values (?, ?, ?, ?)
insert into type_b (some_prop, entity_id, prop3, prop4) values (?, ?, ?, ?)
update abstract_type set entity_id=? where id=?
As you can see, it's trying to update a table which doesn't (and shouldnt) exist. 'abstract_type' table.
Thanks in advance.
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