我正在尝试从我的表中获取所有对象,但我不明白为什么我会收到此错误...:org.hibernate.hql.internal.ast.QuerySyntaxException:calamartest.personne未映射 我可以插入没有问题,但查询不起作用。
我的代码:
List<Personne> listPersonne;
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("testhibernate0");
EntityManager entityManager = entityManagerFactory.createEntityManager();
entityManager.getTransaction().begin();
listPersonne = entityManager.createQuery("from calamartest.personne", Personne.class).getResultList();
entityManager.getTransaction().commit();
entityManager.close();
我的课程:
@Entity
@Table( name = "calamartest.personne")
public class Personne {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "personne_seq_gen")
@SequenceGenerator(name = "personne_seq_gen", sequenceName = "calamartest.personne_id_seq",initialValue = 1, allocationSize = 1)
private int id ;
private String nom ;
@OneToMany(mappedBy="personne", cascade = CascadeType.PERSIST, fetch = FetchType.EAGER)
private List<Maison> listMaison;
[...]
}
@Entity
@Table( name = "calamartest.maison")
public class Maison {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "maison_seq_gen")
@SequenceGenerator(name = "maison_seq_gen", sequenceName = "calamartest.maison_id_seq",initialValue = 1, allocationSize = 1)
private int id;
@ManyToOne
private Personne personne;
private String adresse;
[...]
}
我的persistence.xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="testhibernate0" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>bean.Personne</class>
<class>bean.Maison</class>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
<property name="hibernate.id.new_generator_mappings" value="false"/>
[...]
</properties>
</persistence-unit>
</persistence>
谢谢你的帮助! :)
所以我的问题出现在我的查询中:我正在调用postgres标签{myschema}。{mytab}
listPersonne = entityManager.createQuery("from calamartest.personne", Personne.class).getResultList();
而不是调用我的班级名称:
listPersonne = entityManager.createQuery("from Personne", Personne.class).getResultList();
答案 0 :(得分:4)
错误来自您的查询:from calamartest.personne
。没有课程personne
,但Personne
存在。
还有一件事,确保实体在正确的包装下。在您的代码中,您在from calamartest.Personne
内向persistence.xml
发出请求,Personne
类位于bean
包下。