6 Matching Annotations
  1. Jun 2016
    1. A persistence context is a set of entity instances in which for any persistent entity identity there is a unique entity instance

      A set of entities is persistence context?

      Persistence Context:

      一堆实例,其中,每一个每一条数据库记录(持久化实例的ID)都对应一个单独的实例。

    1. you may want to add a mappedBy="addressOwner" attribute to your User to signal to the persistence provider that the join column should be in the ADDRESS table.

      mappedBy is used to signal the persistence provider(hinernate) that the join column can be found by another class's given property.

  2. Feb 2015
    1. 2.3.2. Mapping native queries You can also map a native query (ie a plain SQL query). To achieve that, you need to describe the SQL resultset structure using @SqlResultSetMapping (or @SqlResultSetMappings if you plan to define several resulset mappings). Like @NamedQuery, a @SqlResultSetMapping can be defined at class level or in a JPA XML file. However its scope is global to the application.

      JPA SQL native query den join ile birden fazla nesne elde etme

    1. @SqlResultSetMappings( { @SqlResultSetMapping(name = "ProfessorWithAddress", entities = { @EntityResult(entityClass = Professor.class), @EntityResult(entityClass = Address.class) }) })

      jpa birden fazla tabloyu direk sınıf ile eşleme join table mapping

    1. Use @FieldResult in the SqlResultSetMapping, to link each entity property to its column alias

      birden fazla tablonun birleşimini sınıflara eşleştirirken oluşan hatanın giderilmesi