About composite

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Manual
14

Defining a JPA Entity Class [2011-02-11]

keys,  including composite primary keys and automatic sequential value generation
Manual
14

Defining a JPA Entity Class [2018-10-20]

keys,  including composite primary keys and automatic sequential value generation
Manual
14

Defining a JPA Entity Class [2019-01-29]

composite primary keys and automatic sequential value generation. This is a very powerful feature
Manual
14

Defining a JPA Entity Class [2019-01-29]

composite primary keys and automatic sequential value generation. This is a very powerful feature
Manual
14

Defining a JPA Entity Class [2019-01-31]

composite primary keys and automatic sequential value generation. This is a very powerful feature
Manual
14

Defining a JPA Entity Class

composite primary keys and automatic sequential value generation. This is a very powerful feature
JPA Doc
8

javax.persistence.MapsId

. The value element specifies the attribute within a composite key to which the relationship attribute ... ; ... } // dependent entity uses EmbeddedId for composite key @Embeddable ... within the composite key to which the relationship attribute corresponds. (Optional) The name of the attribute
Issue
4

Explorer bug ? Objects seem to be missing from database in Class view, but are present as references

: RequestBean []: Created: com.greensoft.entity.Activity [null](TEST: activity 4 (AND composite)) INFO: RequestBean []: Persisted: com.greensoft.entity.Activity [21](TEST: activity 4 (AND composite)) INFO ... []: Updated: com.greensoft.entity.Activity [21](TEST: activity 4 (AND composite)) INFO: RequestBean
JPA Doc
4

javax.persistence.EmbeddedId

javax.persistence Annotation EmbeddedId Target: Fields (including property get methods) Applied to a persistent field or property of an entity class or mapped superclass to denote a composite primary key that is an embeddable class. The embeddable class must be annotated as Embeddable
JPA Doc
4

javax.persistence.IdClass

javax.persistence Annotation IdClass Target: Classes Specifies a composite primary key class that is mapped to multiple fields or properties of the entity. The names of the fields or properties in the primary key class and the primary key fields or properties of the entity must correspond