Question

我有一个UserProfile对象，其中包含通过一对一关系对TwitchAccount对象的引用，如下所示：

TwitchAccount.java：

@OneToOne(mappedBy = "twitchAccount")
private UserProfile profile;

UserProfile.java：

@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "twitchAccountId", referencedColumnName = "twitchAccountId")
private TwitchAccount twitchAccount;

当我对特定的TwitchAccount对象执行GET请求时，似乎在两者之间存在递归：

{"id":1,"state":"525367bb-ca4c-4131-ac52-e29aafdb7dc1","code":null,"userProfile":{"id":8,"firstName":null,"lastName":null,"profilePicUrl":null,"birthday":null,"steamId":null,"xblId":null,"psnId":null,"epicId":null,"discordId":null,"twitchAccount":{"id":1,"state":"525367bb-ca4c-4131-ac52-e29aafdb7dc1","code":null,"userProfile":{"id":8,"firstName":null,"lastName":null,"profilePicUrl":null,"birthday":null,"steamId":null,"xblId":null,"psnId":null,"epicId":null,"discordId":null,"twitchAccount":{"id":1,"state":"525367bb-ca4c-4131-ac52-e29aafdb7dc1","code":null,"userProfile":{"id":8,"firstName":null,"lastName":null,"profilePicUrl":null,"birthday":null,"steamId":null,"xblId":null,"psnId":null,"epicId":null,"discordId":null,"twitchAccount":{"id":1,"state":"525367bb-ca4c-4131-ac52-e29aafdb7dc1","code":null,"userProfile":{"id":8,"firstName":null,"lastName":null,"profilePicUrl":null,"birthday":null,"steamId":null,"xblId":null,"psnId":null,"epicId":null,"discordId":null,"twitchAccount":{"id":1,"state":"525367bb-ca4c-4131-ac52-e29aafdb7dc1","code":null,"userProfile":{"id":8,"firstName":null,"lastName":null,"profilePicUrl":null,"birthday":null,"steamId":null,"xblId":null,"psnId":null,"epicId":null,"discordId":null,"twitchAccount":{"id":1,"state":"525367bb-ca4c-4131-ac52-e29aafdb7dc1","code":null,"userProfile":{"id":8,"firstName":null,"lastName":null,"profilePicUrl":null,"birthday":null,"steamId":null,"xblId":null,"psnId":null,"epicId":null,"discordId":null,"twitchAccount":{"id":1,"state":"525367bb-ca4c-4131-ac52-e29aafdb7dc1","code":null,"userProfile":{"id":8,"firstName":null,"lastName":null,"profilePicUrl":null,"birthday":null,"steamId":null,"xblId":null,"psnId":null,"epicId":null,"discordId":null,"twitchAccount":{"id":1,"state":"525367bb-ca4c-4131-ac52-e29aafdb7dc1","code":null,"userProfile":{"id":8,"firstName":null,"lastName":null,"profilePicUrl":null,"birthday":null,"steamId":null,"xblId":null,"psnId":null,"epicId":null,"discordId":null,"twitchAccount":{"id":1,"state":"525367bb-ca4c-4131-ac52-e29aafdb7dc1","code":null,"userProfile":{"id":8,"firstName":null,"lastName":null,"profilePicUrl":null,"birthday":null,"steamId":null,"xblId":null,"psnId":null,"epicId":null,"discordId":null,"twitchAccount":{"id":1,"state":"525367bb-ca4c-4131-ac52-e29aafdb7dc1","code":null,"userProfile":

我该如何阻止这种递归的发生，以及如何做到这一点，以使抽搐帐户甚至不返回与用户个人资料对象相关联的json（抽搐帐户对象不应该设置或获取用户个人资料）？

Answer 1

您可以像这样用@JsonIgnore注释profile属性，

@JsonIgnore
@OneToOne(mappedBy = "twitchAccount")
private UserProfile profile;

但这当然不是一个好习惯，因为这样一来，您就不断暴露实体，这是一个错误，并且还因为当您需要公开UserProfile时可能会遇到问题。

因此，为这两个实体创建DTO，并在它们的相关服务上创建转换方法，完成后，您可以控制设置。

但是，此问题可能会更加严重，更确切地说，可能是数据库表以及配置文件和帐户之间的关系出现问题，但是由于您没有发布其余的代码，因此没有问题说话的方式。

只需确保清除您所需的个人资料-帐户关系，因为您可能在数据库设计过程中创建了双向关系，而不是单向关系，而我想这就是您想要实现的。

停止从双向一对一映射递归

1 个答案: