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[英]Intermittent error org.hibernate.PersistentObjectException: detached entity passed to persist
[英]Error: org.hibernate.PersistentObjectException: detached entity passed to persist
我正在開發Spring-boot + ReactJs應用程序。 我基本上有2個實體(品牌和家庭),它們之間存在一對多的關系。
@Entity
@Table(name = "brands")
public class Brand extends UserDateAudit {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@NotBlank
@Size(max = 140)
private String name;
@Lob @JsonProperty("image")
private byte[] image;
@OneToMany
private Set<Family> family;
和
@Entity
@Table(name = "family")
public class Family extends UserDateAudit {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@NotBlank
@Size(max = 140)
private String name;
@JsonIgnoreProperties({"hibernateLazyInitializer", "handler"})
@ManyToOne(fetch = FetchType.LAZY,cascade=CascadeType.ALL, optional = false)
@JoinColumn(name = "brand_id")
private Brand brand;
當我創建“家庭”對象時,它引發以下錯誤。
org.hibernate.PersistentObjectException: detached entity passed to persist: com.example.polls.model.Brand
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:124) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:807) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:774) ~[hibernate-core-5.2.17.Final.jar:5.2.17.Final]
createFamily()如下。
public Family createFamily(@Valid FamilyRequest familyRequest) {
Family family = new Family();
family.setName(familyRequest.getName());
family.setBrand(familyRequest.getBrand());
return familyRepository.save(family);
}
通過調試,我發現“ familyRequest”同時具有“ name”和“ Brand_id”
ReactJS:
handleSubmit(event) {
event.preventDefault();
// console.log('image: '+this.state.brand_id.text);
const familyData = {
name: this.state.name.text,
brand: {id : this.state.brand_id.text}
// band_id: this.state.band_id
};
createFamily(familyData)
.then(response => {
this.props.history.push("/");
}).catch(error => {
if(error.status === 401) {
this.props.handleLogout('/login', 'error', 'You have been logged out. Please login create family.');
} else {
notification.error({
message: 'Polling App',
description: error.message || 'Sorry! Something went wrong. Please try again!'
});
}
});
}
我不確定我為brand_id設置的值是否正確。 請幫助我解決這個問題。
您的映射不正確。 雙向OneToMany的一側必須使用mappingBy屬性。
將所有操作層疊在ManyToOne上是沒有意義的:創建家族時,您不想創建品牌:它已經存在。 而且,當您刪除一個家庭時,您不想刪除其品牌,因為許多其他家庭都引用了該品牌。
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