弹簧引导的一对多关系中的无限循环 [英] Infinite loop with spring-boot in a one to many relation

问题描述

在其他应用程序中，我将Spring Boot与jpa一起使用.

In a rest application, I use spring boot with jpa.

我有一个寄宿生课程

谁拥有

@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "lodger")
private List<Reference> referenceList;

在我的课堂参考资料中，我有

In my class Reference, i have

@ManyToOne
@JoinColumn(name = "lodgerId")
private Lodger lodger;

当我调用此方法时

@RequestMapping(value = "/lodgers/{lodgerId}", method = RequestMethod.GET)
public Lodger getLogderById(@PathVariable("lodgerId") long lodgerId) {
    return lodgerService.getLodger(lodgerId);
}

我收到此错误

org.springframework.http.converter.HttpMessageNotWritableException: Could not write content: Infinite recursion (StackOverflowError) (through reference chain: server.bean.Lodger["referenceList"]->org.hibernate.collection.internal.PersistentBag[0]->server.bean.Reference["lodger"]->server.bean.Lodger["referenceList"]->org.hibernate.collection.internal.PersistentBag[0]->server.bean.Reference["lodger"]->server.bean.Lodger["referenceList"]...

推荐答案

解决方案:

使用

@JsonManagedReference注释

@JsonBackReference注释

第一:

@JsonManagedReference
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "lodger")
    private List<Reference> referenceList;

第二:

@JsonBackReference
@ManyToOne
    @JoinColumn(name = "lodgerId")
    private Lodger lodger;

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