The best way to map @ManyToMany
@ManyToMany
Many to many relationships can be easily mapped by creating another table using @JoinTable as follows.
Student entity
@Data
@Table(name = "Student")
@Entity
public class Student implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
private String studentName;
@ManyToMany
@JoinTable(
name = "student_task",
joinColumns = @JoinColumn(name = "task_id"),
inverseJoinColumns = @JoinColumn(name = "student_id")
)
private Set<Task> tasks = new HashSet<>();
}
Task entity
@Entity
@Data
@Table(name = "tasks")
public class Task implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
private String taskName;
@ManyToMany(mappedBy = "tasks")
private Set<Student> students = new HashSet<>();
}
