J'ai trois entités école, Département, Programme et chaque fois que j'ai essayé de joindre deux de ces entités, la troisième se fait référence et donc je cherche un exemple en utilisant le constructeur de critères sur la façon de démarrer correctement à Root <> entité et rejoindre correctement.Comment créer emboîtés correctement inscrire à l'aide des critères Builder
Mon école l'entité est à l'origine du problème.
public class School {
@NotNull
private String name;
@NotNull
private String code;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "schoolDepartment")
private Set<Department> departments = new HashSet<Department>();
@OneToMany(cascade = CascadeType.ALL, mappedBy = "school")
private Set<Program> programs = new HashSet<Program>();
}
Entité de programme
public class Program {
@NotNull
@Size(min = 0, max = 300)
private String name;
@NotNull
@Size(min = 0)
private String description;
private String code;
@Enumerated(EnumType.STRING)
private ProgramType programType;
@ManyToOne
private School school;
Ma tentative de ne pas seulement joindre les deux entités ci-dessus et EclipseLink va et fait référence à la troisième?
// FROM program JOIN School
Root<Program> program = cq.from(Program.class);
Join<School,Program> school = program.join("school" , JoinType.INNER);
//Join<School, Department> departmentJoin = school.join("schoolDepartment", JoinType.LEFT);
// SELECT task as Task, person as Person, ...
cq.multiselect(program,school);
return program; // EclipseLink requires a joined entity for the count
La trace de pile complète qui inclut le code SQL généré. Remarquez comment il commence à référencer l'entité School, puis appelle ReadAllObjectQuery sur l'entité Department.
[EL Fine]: sql: 2012-05-06 17:34:52.886--ServerSession(1839972036)--Connection(131165903)--Thread(Thread["http-bio-8080"-exec-3,5,main])--SELECT t0.id, t0.CODE, t0.NAME, t0.version, t1.programID, t1.ACTIVE, t1.CODE, t1.DESCRIPTION, t1.NAME, t1.PROGRAMTYPE, t1.REQUIREDCREDITS, t1.version, t1.SCHOOL_id FROM SCHOOL t0 LEFT OUTER JOIN PROGRAM t1 ON (t1.SCHOOL_id = t0.id), SCHOOL t2 WHERE (t2.id = t1.SCHOOL_id)
[EL Finest]: connection: 2012-05-06 17:34:52.888--ServerSession(1839972036)--Connection(354961667)--Thread(Thread["http-bio-8080"-exec-3,5,main])--Connection released to connection pool [read].
2012-05-06 17:34:52,896 ["http-bio-8080"-exec-3] DEBUG org.springframework.beans.factory.annotation.InjectionMetadata - Processing injected method of bean 'org.bixin.dugsi.domain.School': PersistenceElement for transient javax.persistence.EntityManager org.bixin.dugsi.domain.School.entityManager
2012-05-06 17:34:52,896 ["http-bio-8080"-exec-3] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'entityManagerFactory'
2012-05-06 17:34:52,899 ["http-bio-8080"-exec-3] DEBUG org.springframework.beans.factory.annotation.InjectionMetadata - Processing injected method of bean 'org.bixin.dugsi.domain.School': PersistenceElement for transient javax.persistence.EntityManager org.bixin.dugsi.domain.School.entityManager
2012-05-06 17:34:52,900 ["http-bio-8080"-exec-3] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'entityManagerFactory'
2012-05-06 17:34:52,901 ["http-bio-8080"-exec-3] DEBUG org.springframework.beans.factory.annotation.InjectionMetadata - Processing injected method of bean 'org.bixin.dugsi.domain.School': PersistenceElement for transient javax.persistence.EntityManager org.bixin.dugsi.domain.School.entityManager
2012-05-06 17:34:52,901 ["http-bio-8080"-exec-3] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'entityManagerFactory'
2012-05-06 17:34:52,902 ["http-bio-8080"-exec-3] DEBUG org.springframework.beans.factory.annotation.InjectionMetadata - Processing injected method of bean 'org.bixin.dugsi.domain.Program': PersistenceElement for transient javax.persistence.EntityManager org.bixin.dugsi.domain.Program.entityManager
2012-05-06 17:34:52,903 ["http-bio-8080"-exec-3] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'entityManagerFactory'
[EL Finest]: query: 2012-05-06 17:34:52.904--ServerSession(1839972036)--Thread(Thread["http-bio-8080"-exec-3,5,main])--Execute query ReadObjectQuery(name="school" referenceClass=School)
2012-05-06 17:34:52,908 ["http-bio-8080"-exec-3] DEBUG org.springframework.beans.factory.annotation.InjectionMetadata - Processing injected method of bean 'org.bixin.dugsi.domain.Program': PersistenceElement for transient javax.persistence.EntityManager org.bixin.dugsi.domain.Program.entityManager
2012-05-06 17:34:52,908 ["http-bio-8080"-exec-3] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'entityManagerFactory'
[EL Finest]: transaction: 2012-05-06 17:34:52.908--UnitOfWork(2138845270)--Thread(Thread["http-bio-8080"-exec-3,5,main])--[EL Finest]: query: 2012-05-06 17:34:52.91--ServerSession(1839972036)--Thread(Thread["http-bio-8080"-exec-3,5,main])--Execute query ReadAllQuery(name="departments" referenceClass=Department)
[EL Finest]: connection: 2012-05-06 17:34:52.911--ServerSession(1839972036)--Connection(32490450)--Thread(Thread["http-bio-8080"-exec-3,5,main])--Connection acquired from connection pool [read].
[EL Finest]: connection: 2012-05-06 17:34:52.911--ServerSession(1839972036)--Thread(Thread["http-bio-8080"-exec-3,5,main])--reconnecting to external connection pool
[EL Fine]: sql: 2012-05-06 17:34:52.912--ServerSession(1839972036)--Connection(606146812)--Thread(Thread["http-bio-8080"-exec-3,5,main])--SELECT id, ACTIVE, CODE, DESCRIPTION, NAME, version, SCHOOLDEPARTMENT_id FROM DEPARTMENT WHERE (SCHOOLDEPARTMENT_id = ?)
bind => [1]
[EL Finest]: connection: 2012-05-06 17:34:52.913--ServerSession(1839972036)--Connection(32490450)--Thread(Thread["http-bio-8080"-exec-3,5,main])--Connection released to connection pool [read].
2012-05-06 17:34:52,914 ["http-bio-8080"-exec-3] DEBUG org.springframework.beans.factory.annotation.InjectionMetadata - Processing injected method of bean 'org.bixin.dugsi.domain.Department': PersistenceElement for transient javax.persistence.EntityManager org.bixin.dugsi.domain.Department.entityManager
2012-05-06 17:34:52,914 ["http-bio-8080"-exec-3] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'entityManagerFactory'
[EL Finest]: query: 2012-05-06 17:34:52.915--ServerSession(1839972036)--Thread(Thread["http-bio-8080"-exec-3,5,main])--Execute query ReadObjectQuery(name="schoolDepartment" referenceClass=School)
[EL Finest]: query: 2012-05-06 17:34:52.915--ServerSession(1839972036)--Thread(Thread["http-bio-8080"-exec-3,5,main])--Execute query ReadAllQuery(name="programs" referenceClass=Program)
[EL Finest]: connection: 2012-05-06 17:34:52.916--ServerSession(1839972036)--Connection(63558014)--Thread(Thread["http-bio-8080"-exec-3,5,main])--Connection acquired from connection pool [read].
[EL Finest]: connection: 2012-05-06 17:34:52.916--ServerSession(1839972036)--Thread(Thread["http-bio-8080"-exec-3,5,main])--reconnecting to external connection pool
[EL Fine]: sql: 2012-05-06 17:34:52.917--ServerSession(1839972036)--Connection(920168739)--Thread(Thread["http-bio-8080"-exec-3,5,main])--SELECT programID, ACTIVE, CODE, DESCRIPTION, NAME, PROGRAMTYPE, REQUIREDCREDITS, version, SCHOOL_id FROM PROGRAM WHERE (SCHOOL_id = ?)
inclure votre code complet pour la requête, et le SQL qui a été généré – James
J'ai ajouté la trace de la pile qui génère le SQL. La requête est une requête de critères qui commence juste à la racine se joint à l'école et est supposé s'arrêter juste là mais puisque l'école a des «départements» comme une référence oneToMany elle continue –
Warz