Snippets tagged “jpa”
7 snippets use this tag.
- Difference between FetchType LAZY and EAGER in Java Persistence API?Java
In the Java Persistence API (JPA), the FetchType enum is used to specify the strategy for fetching data from the database.
- JPA JoinColumn vs mappedByJava
In a JPA entity mapping, the @JoinColumn annotation is used to specify the foreign key column for a many-to-one or one-to-one relationship.
- Setting default values for columns in JPAJava
To set default values for columns in JPA (Java Persistence API), you can use the @Column annotation and the columnDefinition attribute.
- Spring Data JPA - "No Property Found for Type" ExceptionJava
This exception is usually thrown when you are trying to access a property that does not exist in the entity class you are querying.
- Spring JPA selecting specific columnsJava
To select specific columns using Spring JPA, you can use the @Query annotation and specify the columns in the SELECT clause of the JPQL query.
- What is the meaning of the CascadeType.ALL for a @ManyToOne JPA associationJava
In a JPA entity relationship, the CascadeType.ALL annotation specifies that all operations (persist, merge, remove, refresh, and detach) that are performed on the parent entity should be cascaded to the child entity.
- What's the difference between JPA and Hibernate?Java
Java Persistence API (JPA) is a specification for object-relational mapping (ORM) in Java.