CODEWITHSUNDEEP
javaxmlspringhibernatejpa
Alex
Alex

Reputation: 51

Error creating bean. Could not determine type for: java.util.List

In an Entity class, I have a field as: @Column(name = "alias", length = 255) private List<String> akaList;

When it's run, I have an error:

Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not determine type for: java.util.List, at table: customer, for columns: [org.hibernate.mapping.Column(alias)]

What could be the reason?

Upvotes: 0

Views: 314

Answers (1)

pleft
pleft

Reputation: 7905

Add the following annotation: @ElementCollection(fetch = FetchType.EAGER) in addition to @Column. Usually you address this kind of relationships with @OneToMany association. The element collection might seem easier to use than an entity with @OneToMany association. But it has one major drawback: The elements of the collection have no id and Hibernate can’t address them individually.

@ElementCollection(fetch = FetchType.EAGER)
@Column(name = "alias", length = 255) 
private List<String> akaList;

Upvotes: 1

Related Questions