Apache的駱駝揚鞭 - 使用JPA實體其餘類型

Question

我有這樣的休息-DSL：

// this api creates new user 
rest("/user") 
    .post() 
    .type(User.class).to("jpa://com.project.User") 

這是我的實體：

public class User{ 
    @Id 
    private String id; 
    @ManyToOne 
    @JoinColumn(name = "id_role") 
    private Role role; 
} 

public class Role{ 
    @Id 
    private String id; 
    @OneToMany(mappedBy="user") 
    private List<User> users; 
} 

我的問題是在我的身體數值參數招搖例。它包含這樣的：

{ 
    "id": "string", 
    "role": { 
    "id": "string", 
    "users": [ 
     { 
     "id": "string", 
     "roles": [ 
      {} 
     ] 
     } 
    ] 
    } 
} 

相當複雜的，雖然我只需要id和id_role參數來創建（POST）新用戶。我希望身體示例如下所示：

{ 
    "id": "string", 
    "id_role": "string" 
} 

Answer 1

我意識到我的實體沒有正確創建。這些是我瞭解到：

1. Configure CascadeType in associated JPA entities

   @Entity 
   
   public class User { 
       @Id 
       private String id; 
       @ManyToOne 
       @JoinColumn(name = "id_role") 
       private Role role; 
   } 
   
   @Entity 
   public class Role{ 
       @Id 
       private String id; 
       @OneToMany(mappedBy="user", cascade = CascadeType.ALL) 
       private List<User> users; 
   } 
   

2. 使類不是遞歸，設置@JsonIgnore

   @Entity 
   @JsonIdentityInfo(
        generator = ObjectIdGenerators.PropertyGenerator.class, 
        property = "id") 
   public class User{ 
       @Id 
       private String id; 
       @ManyToOne 
       @JoinColumn(name = "id_role") 
       private Role role; 
   } 
   
   @Entity 
   @JsonIdentityInfo(
        generator = ObjectIdGenerators.PropertyGenerator.class, 
        property = "id") 
   public class Role{ 
       @Id 
       private String id; 
       @OneToMany(mappedBy="user", cascade = CascadeType.ALL) 
       @JsonIgnore 
       // this attribute will not appear inside Role class 
       private List<User> users; 
   }