Spring Data Rest - PUT不適用於關聯的引用類型？

Question

我有一個Spring Data Rest項目實現的以下域類。

@Entity 
@Data 
public class Address { 

    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    @Column(name = "id") 
    private long addressID; 

    private String houseName; 

    private String apartmentNumber; 

    @ManyToOne 
    private City city; 

    @ManyToOne 
    private Country country; 

} 

現在我正在通過發送帶有以下JSON的POST來創建Address資源。

{ 
    "houseName":"Some House", 
    "apartmentNumber":"13 B", 
    "city": "http://localhost:8080/city/1" 
    "country":"http://localhost:8080/countries/1" 
} 

當我發送一個PUT請求到端點http://localhost:8080/addresses/1與以下JSON，爲houseName值被更新。但即使我爲城市發送不同的URI，該城市仍然保持不變。

{ 
    "houseName":"Another House", 
    "apartmentNumber":"13 B", 
    "city": "http://localhost:8080/city/2" 
    "country":"http://localhost:8080/countries/1" 
} 

如果我發送PATCH而不是PUT，城市值也會更新。那麼我該如何解決這個問題？

更新1

國家類

@Data 
@Entity 
public class Country { 

    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    private long countryID; 

    private String countryName; 

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "country", orphanRemoval = true) 
    private List<City> cities; 

} 

市級

@Data 
@Entity 
public class City { 

    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    @Column(name = "id") 
    private long cityID; 

    private String cityName; 

    @ManyToOne 
    @JoinColumn(name = "country_id") 
    private Country country; 
} 

Answer 1

如果您正在使用Hibernate作爲JPA提供者，那麼你就必須讓知道的實體如何映射在兩邊，並指出它在子實體中的映射方式，這將關注如何在a中管理關係交易。

編輯和更新：

//市級

@Entity 
public class City { 

    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    @Column(name = "city_id") 
    private Long cityID; 

    @Column(name = "city_name") 
    private String cityName; 

    @ManyToOne 
    private Country country; 

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "city", orphanRemoval = true) 
    private List<Address> addresses; 
} 

//國家類

@Entity 
public class Country { 

    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    @Column(name = "country_id") 
    private Long countryID; 

    @Column(name = "country_name") 
    private String countryName; 

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "country", orphanRemoval = true) 
    private List<City> cities = new ArrayList<>();; 

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "country", orphanRemoval = true) 
    private List<Address> addresses; 
} 

使用Patch：如果要更新資源的一部分，資源和關係的子集

使用PUT：如果你有一個全新的表示