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I seem to have problems with mapping a List in Hibernate. In our project there a class Card with contains a class Answer with Answer containing a List<String>.
Is a List<String> mappable by Hibernate using annotations? I mean, since it does not have the @Entity annotation?
Regards
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All classes should contain an ID in order to allow easy identification of your objects within Hibernate and the database. This property maps to the primary key column of a database table. All attributes that will be persisted should be declared private and have getXXX and setXXX methods defined in the JavaBean style.
To save list of object, you need to iterate by objects, something like this -> How to insert multiple rows into database using hibernate? Save this answer. Show activity on this post. I would further recommend to use another Hibernate command to avoid an Out Of Memory error...
The @Cascade annotation enables Hibernate to persist the collections associated with the main instance.
Persist should be called only on new entities, while merge is meant to reattach detached entities. If you're using the assigned generator, using merge instead of persist can cause a redundant SQL statement.
Use @ElementCollection:
@ElementCollection @CollectionTable(name="Nicknames", joinColumns=@JoinColumn(name="user_id")) @Column(name="nickname") public List<String> getNicknames() { ... } Source: 7.2.3. Collections of basic types and embeddable objects
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