Simple requirement .. but I don't know how!

[abu alfouz]

Hi All,

I work on an application that connect to database by hibernate (I use annotations). I have 2 entities (Department and Employee). Of course the Employee has one Department but the Department has many employees.

What I want is to be able to delete some Department without delete its Employees. (When deleting Department the hibernate should delete constraints that link some Employees to it without deleting the Employees).

Here are the classes:

*** This is the Department class:

 

 @Entity  
 public class Department {  
   
     @Id  
     @GeneratedValue(strategy = GenerationType.IDENTITY)  
     @Column(name = "ID",updatable=true)  
     private long id;  
   
     @Column(name = "TITLE", length = 100, nullable = false)  
     private String name;  
   
     @OneToMany(mappedBy = "department")  
     private List<Employee> employees;  
   
   
     public long getId() {  
         return id;  
     }  
   
     public void setId(long id) {  
         this.id = id;  
     }  
   
     public String getName() {  
         return name;  
     }  
   
     public void setName(String name) {  
         this.name = name;  
     }  
   
     public List<Employee> getEmployees() {  
         return employees;  
     }  
   
     public void setEmployees(List<Employee> employees) {  
         this.employees = employees;  
     }  
 }  

  

*** This is the Employee class:

    


 @Entity  
 public class Employee {  
   
     @Id  
     @GeneratedValue(strategy = GenerationType.IDENTITY)  
     @Column(name = "ID")  
     private long id;  
   
     @Column(name= "NAME", length = 100, nullable = false)  
     private String name;  
   
     @ManyToOne()  
     private Department department;  
   
   
     public long getId() {  
         return id;  
     }  
   
     public void setId(long id) {  
         this.id = id;  
     }  
   
     public String getName() {  
         return name;  
     }  
   
     public void setName(String name) {  
         this.name = name;  
     }  
   
     public Department getDepartment() {  
         return department;  
     }  
   
     public void setDepartment(Department department) {  
         this.department = department;  
     }  
   
     public void setProjects(List<Project> projects) {  
         this.projects = projects;  
     }  
   
 } 

Any help please.

Thank you.

[Campbell Ritchie]

People will be more likely to reply if they know what the thread is about.

[Rob Spoor]

Moving to our ORM forum where we discuss Hibernate.

[Jeanne Boyarsky]

I see it is already there. Closing duplicate thread