hibernate-annotations

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

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If I remember correctly, Hibernate doesn’t let you mix and match annotation in conjunction with field / getter. If your @Id annotation is set over a field, all your mappings should follow fields. Try moving @OneToMany @JoinColumn(name=”INVOICE_ID”, nullable=false) from getInvoices() to private Set<Invoice> invoices; This pattern should be applied to your Invoice class as well

Hibernate/persistence without @Id

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If there’s a combination of columns that makes a row unique, model a primary key class around the combination of columns. If there isn’t, you’re basically out of luck — but you should reexamine the design of the view since it probably doesn’t make sense. There are a couple different approaches: @Entity public class RegionalArticle … Read more

Hibernate Mapping Package

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Out of the box – no. You can write your own code to detect / register your annotated classes, however. If you’re using Spring, you can extend AnnotationSessionFactoryBean and do something like: @Override protected SessionFactory buildSessionFactory() throws Exception { ArrayList<Class> classes = new ArrayList<Class>(); // the following will detect all classes that are annotated as … Read more

Hibernate recursive many-to-many association with the same entity

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@ManyToMany to self is rather confusing because the way you’d normally model this differs from the “Hibernate” way. Your problem is you’re missing another collection. Think of it this way – if you’re mapping “author”https://stackoverflow.com/”book” as many-to-many, you need “authors” collection on Book and “books” collection on Author. In this case, your “User” entity represents … Read more

How can I mark a foreign key constraint using Hibernate annotations?

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@Column is not the appropriate annotation. You don’t want to store a whole User or Question in a column. You want to create an association between the entities. Start by renaming Questions to Question, since an instance represents a single question, and not several ones. Then create the association: @Entity @Table(name = “UserAnswer”) public class … Read more

mappedBy reference an unknown target entity property

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The mappedBy attribute is referencing customer while the property is mCustomer, hence the error message. So either change your mapping into: /** The collection of stores. */ @OneToMany(mappedBy = “mCustomer”, cascade = CascadeType.ALL, fetch = FetchType.LAZY) private Collection<Store> stores; Or change the entity property into customer (which is what I would do). The mappedBy reference … Read more

can someone please explain me @MapsId in hibernate?

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Here is a nice explanation from Object DB. Designates a ManyToOne or OneToOne relationship attribute that provides the mapping for an EmbeddedId primary key, an attribute within an EmbeddedId primary key, or a simple primary key of the parent entity. The value element specifies the attribute within a composite key to which the relationship attribute … Read more

@UniqueConstraint and @Column(unique = true) in hibernate annotation

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As said before, @Column(unique = true) is a shortcut to UniqueConstraint when it is only a single field. From the example you gave, there is a huge difference between both. @Column(unique = true) @ManyToOne(optional = false, fetch = FetchType.EAGER) private ProductSerialMask mask; @Column(unique = true) @ManyToOne(optional = false, fetch = FetchType.EAGER) private Group group; This … Read more

Hibernate throws org.hibernate.AnnotationException: No identifier specified for entity: com..domain.idea.MAE_MFEView

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You are missing a field annotated with @Id. Each @Entity needs an @Id – this is the primary key in the database. If you don’t want your entity to be persisted in a separate table, but rather be a part of other entities, you can use @Embeddable instead of @Entity. If you want simply a … Read more