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[英]How to join data in unidirectional ManyToMany and ManyToOne relation with Hibernate Search
[英]Hibernate Unidirectional ManyToMany Update Target Constituent Relation
有一个单向ManyToMany
之间的映射Role
和Privilege
与Role
作为像这样的拥有实体
Role
@Entity
public class Role extends BaseEntity {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "role_id")
private Integer roleId;
@Size(max = 45)
@Column(name = "role")
private String role;
@JoinTable(name = "role_privilege", joinColumns = {
@JoinColumn(name = "role_role_id", referencedColumnName = "role_id")}, inverseJoinColumns = {
@JoinColumn(name = "privilege_privilege_id", referencedColumnName = "privilege_id")})
@ManyToMany(
cascade = {
CascadeType.DETACH,
CascadeType.MERGE,
CascadeType.REFRESH,
CascadeType.PERSIST }, fetch = FetchType.EAGER, targetEntity = Privilege.class)
private Collection<Privilege> privilegeCollection;
@Transient
private Collection<Privilege> parentPrivilegeCollection;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "roleId")
@JsonIgnore
private Collection<User> userCollection;
public Role() {
}
//getters,setter,hashcode,equals removed for brevity
}
Privilege
@Entity
public class Privilege extends BaseEntity {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "privilege_id")
private Integer privilegeId;
@Size(max = 45)
@Column(name = "name")
private String name;
@Size(max = 150)
@Column(name = "description")
private String description;
@Size(max = 45)
@Column(name = "friendly_name")
private String friendlyName;
@JoinTable(name = "privilege_hierachy", joinColumns = {
@JoinColumn(name = "parent_privilege", referencedColumnName = "privilege_id")}, inverseJoinColumns = {
@JoinColumn(name = "child_privilege", referencedColumnName = "privilege_id")})
@ManyToMany
private Collection<Privilege> privilegeCollection;
public Privilege() {
}
}
每当我在角色中设置更新的特权列表并进行更新时,联接表都会成功更新,而不会删除目标实体或拥有实体,这是理想的结果。 问题在于更新时,它还会影响Privilege
另一个名为privilege_hierachy
自联接表,这不是预期的。
休眠状态是否可能仅更新“ Role
- Privilege
多对多关系并使其他关系不变。
Spring Data Jpa用于数据持久性
听起来您正在通过删除旧特权并添加新特权来更新特权。 如果这样做,很明显,第二个联接表(自引用表)可以根据您传递的内容用新行进行更新。
我看到对于自引用表Privilege,您没有设置级联类型。 它默认为无操作,这听起来像您想要的。 但是我的猜测是基于您所说的“每当我在角色中设置特权的更新列表”时 ,这告诉我您是在为角色创建新特权,而不是使用现有特权并将其与角色关联。
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