Hibernate 在数据库中创建冗余列

Question

我在一个房间管理软件工作，我想在其中了解某栋楼的房间。

建筑实体中@OneToMany关系：

   @JsonBackReference(value= "room")
   @OneToMany(targetEntity=Room.class, mappedBy="building", fetch=FetchType.EAGER,cascade = 
              CascadeType.REMOVE,orphanRemoval = true)
   public Set<Room> getRooms() {
       return this.rooms;
}

与房间实体中的@ManyToOne关系：

@JsonManagedReference(value= "room")
@ManyToOne(fetch=FetchType.EAGER)
@JoinColumn(name="building_number", nullable=false)
@OnDelete(action = OnDeleteAction.CASCADE)
public Building getBuilding() {
    return this.building;
}

由于这些关系，自动生成的数据库会生成一个额外的字段，我只想将它们映射到 Room.building_number:

building_building_number 我只需要 building_number.

Answer 1

尝试使用类似的东西：

Building.class:

@OneToMany(mappedBy="building")
private Set<Room> rooms;

// getters and setters

Room.class:

@ManyToOne
@JoinColumn(name="building_number", nullable=false)
private Building building;

// getters and setters

Hibernate 在数据库中创建冗余列

Hibernate creates redundant column in database

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