package com.plannaplan.entities; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.ManyToOne; @Entity public class Assignment { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; @ManyToOne @JoinColumn(name = "group_id") private Groups group; @ManyToOne @JoinColumn(name = "user_id") private User user; public Assignment() { } }