Basic JPA mappings

    Sometimes, when I have to add a couple of mappings to the data model I have to spend a while to recall the correlation between JPA annotations and underlying database schema. I decided to create some kind of a cheat sheet with basic JPA mappings.

• One-to-one unidirectional

• One-to-one bidirectional (I) 

• One-to-one bidirectional (II)

• Many-to-one

• One-to-many unidirectional

•  One-to-many bidirectional

• Many-to-many