Impossible de récupérer l'objet de ressource incorporé Spring HATEOAS dans le cas d'une relation @ManytoMany et d'une table de recherche avec une colonne supplémentaire

Question

Je ne parviens pas à récupérer l'image embarquée .J'utilise le démarrage Spring, le repos de données de ressort et le JPA de ressort. J'ai 3 tables dans les données de base

• utilisateur
• compétence
• user_competency (joindre/tableau composite avec colonne supplémentaire)

utilisateur

@Entity 
@Table(name = "\"user\"", schema = "public") 
@JsonIdentityInfo(
      generator = ObjectIdGenerators.IntSequenceGenerator.class, 
      property = "userId") 
public class User implements java.io.Serializable { 

    private Long userId; 

    @Id @GeneratedValue(strategy = GenerationType.IDENTITY) 

    @Column(name = "user_id", unique = true, nullable = false) 
    public Long getUserId() { 
     return this.userId; 
    } 

    public void setUserId(Long userId) { 
     this.userId = userId; 
    } 

    private Set<UserCompetency> userCompetencies = new HashSet<UserCompetency>(0); 

     @OneToMany(fetch = FetchType.EAGER,cascade = {CascadeType.ALL}, mappedBy = "user") 
    public Set<UserCompetency> getUserCompetencies() { 
     return this.userCompetencies; 
    } 

    public void setUserCompetencies(Set<UserCompetency> userCompetencies) { 
     this.userCompetencies = userCompetencies; 
    } 

} 

**Competency** 



@Entity 
    @Table(name = "competency", schema = "public") 
    @JsonIdentityInfo(
       generator = ObjectIdGenerators.IntSequenceGenerator.class, 
       property = "competencyId") 
    public class Competency implements java.io.Serializable { 


     private Long competencyId; 
     private Set<UserCompetency> userCompetencies = new HashSet<UserCompetency>(0); 

     @Id @GeneratedValue(strategy = GenerationType.IDENTITY) 

     @Column(name = "competency_id", unique = true, nullable = false) 
     public Long getCompetencyId() { 
      return this.competencyId; 
     } 

     public void setCompetencyId(Long competencyId) { 
      this.competencyId = competencyId; 
     } 

      @OneToMany(fetch = FetchType.LAZY, mappedBy = "competency") 
     public Set<UserCompetency> getUserCompetencies() { 
      return this.userCompetencies; 
     } 

     public void setUserCompetencies(Set<UserCompetency> userCompetencies) { 
      this.userCompetencies = userCompetencies; 
     } 
    } 

UserCompetency

@Entity 
    @Table(name = "user_competency", schema = "public") 
    @JsonIdentityInfo(
       generator =ObjectIdGenerators.IntSequenceGenerator.class, 
       property = "id") 
    public class UserCompetency implements java.io.Serializable { 
     private UserCompetencyId id; 
     private Level level; 
     private User user; 
     private Competency competency; 

     @EmbeddedId 

     @AttributeOverrides({ 
       @AttributeOverride(name = "competencyId", column = @Column(name = "competency_id", nullable = false)), 
       @AttributeOverride(name = "userId", column = @Column(name = "user_id", nullable = false)) }) 
     public UserCompetencyId getId() { 
      return this.id; 
     } 

     public void setId(UserCompetencyId id) { 
      this.id = id; 
     } 

     @ManyToOne(fetch = FetchType.EAGER) 
     @JoinColumn(name = "level_id") 
     public Level getLevel() { 
      return this.level; 
     } 

     public void setLevel(Level level) { 
      this.level = level; 
     } 

     @ManyToOne(fetch = FetchType.EAGER) 
     @JoinColumn(name = "user_id", nullable = false, insertable = false, updatable = false) 
     public User getUser() { 
return this.user; 
    } 

    public void setUser(User user) { 
     this.user = user; 
    } 

    @ManyToOne(fetch = FetchType.EAGER,cascade=CascadeType.ALL) 
    @JoinColumn(name = "competency_id", nullable = false, insertable = false, updatable = false) 
    public Competency getCompetency() { 
     return this.competency; 
    } 

    public void setCompetency(Competency competency) { 
     this.competency = competency; 
    } 
} 

UserCompetencyId

@Embeddable 
public class UserCompetencyId implements java.io.Serializable { 

    private Long competencyId; 
    private Long userId; 

    public UserCompetencyId() { 
    } 

    public UserCompetencyId(Long competencyId, Long userId) { 
     this.competencyId = competencyId; 
     this.userId = userId; 
    } 


    @Column(name = "competency_id", nullable = false) 
    public Long getCompetencyId() { 
     return this.competencyId; 
    } 

    public void setCompetencyId(Long competencyId) { 
     this.competencyId = competencyId; 
    } 

    @Column(name = "user_id", nullable = false) 
    public Long getUserId() { 
     return this.userId; 
    } 

    public void setUserId(Long userId) { 
     this.userId = userId; 
    } 

    public boolean equals(Object other) { 
     if ((this == other)) 
      return true; 
     if ((other == null)) 
      return false; 
     if (!(other instanceof UserCompetencyId)) 
      return false; 
     UserCompetencyId castOther = (UserCompetencyId) other; 

     return (this.getCompetencyId() == castOther.getCompetencyId()) && (this.getUserId() == castOther.getUserId()); 
    }  
} 

UserCompetencyRepository

public interface UserCompetencyRepository extends JpaRepository<UserCompetency, UserCompetencyId> { 

} 

pom.xml

<?xml version="1.0" encoding="UTF-8"?> 
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 
    <modelVersion>4.0.0</modelVersion> 

    <groupId>com.example</groupId> 
    <artifactId>Demo</artifactId> 
    <version>0.0.1-SNAPSHOT</version> 
    <packaging>war</packaging> 

    <name>Demo</name> 
    <description>Demo api </description> 

    <parent> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-parent</artifactId> 
     <version>1.5.2.RELEASE</version> 
     <relativePath /> <!-- lookup parent from repository --> 
    </parent> 

    <properties> 
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> 
     <java.version>1.8</java.version> 
    </properties> 

    <dependencies> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-actuator</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-data-jpa</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-data-rest</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.data</groupId> 
      <artifactId>spring-data-rest-hal-browser</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-hateoas</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-thymeleaf</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-web</artifactId> 
     </dependency> 

     <dependency> 
      <groupId>org.postgresql</groupId> 
      <artifactId>postgresql</artifactId> 
      <scope>runtime</scope> 
     </dependency> 
     <dependency> 
      <groupId>org.projectlombok</groupId> 
      <artifactId>lombok</artifactId> 
      <optional>true</optional> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-tomcat</artifactId> 
      <scope>provided</scope> 
     </dependency> 
     <dependency> 
      <groupId>com.h2database</groupId> 
      <artifactId>h2</artifactId> 
      <scope>runtime</scope> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-test</artifactId> 
      <scope>test</scope> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.restdocs</groupId> 
      <artifactId>spring-restdocs-mockmvc</artifactId> 
      <scope>test</scope> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-configuration-processor</artifactId> 
      <optional>true</optional> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-configuration-processor</artifactId> 
      <optional>true</optional> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.data</groupId> 
      <artifactId>spring-data-rest-webmvc</artifactId> 
     </dependency> 
    </dependencies> 

    <build> 
     <plugins> 
      <plugin> 
       <groupId>org.springframework.boot</groupId> 
       <artifactId>spring-boot-maven-plugin</artifactId> 
      </plugin> 
     </plugins> 
    </build> 
</project> 

et je veux effectuer GET en utilisant l'URI, il me renvoie un objet incorporé et ne peut pas obtenir la valeur réelle des objets attributs
GET http://localhost:8080/userCompetencies

Comment puis-je obtenir des valeurs d'attribut de l'utilisateur et Objet de compétence où userId = 8 Aide requise

Après la mise en œuvre du problème de projection suggéré non encore résolu et voici la capture d'écran

Answer 1

Un moyen serait d'utiliser les projections comme par exemple:

@Projection(name = "edit" , types = Employee.class) 
public interface EditEmployeeProjection { 
    String getFirstName(); 
    String getLastName(); 
    Set<Project> getProjects(); 
} 

Avec cette liste de projets sera intégrée dans le résultat de http://localhost:8080/api/employee/1?projection=edit

Les projections seraient utilisées automatiquement si vous ajoutez excerptProjection à vous référentiel comme décrit ici: How to expose a complete tree structure with Spring Data REST and HATEOAS?

Voir par exemple ici: https://shinesolutions.com/2015/04/15/spring-data-rest-and-projections/

ÉDITÉ

En vous cas une projection ressemblerait à ceci:

@Projection(name = "edit" , types = UserCompetency.class) 
public interface UserCompetencyProjection { 
    User getUser(); 
    Competency getCompetency(); 
} 

Avec http://localhost:8080/userCompetencies?projection=edit alors vous voir le résultat recherché.

Édité 2 le code I utilisé:

Competency.class

@Entity 
@Table(name = "competency", schema = "public") 
@JsonIdentityInfo(
      generator = ObjectIdGenerators.IntSequenceGenerator.class, 
      property = "competencyId") 
public class Competency implements java.io.Serializable { 

    @Id @GeneratedValue(strategy = GenerationType.IDENTITY) 
    @Column(name = "competency_id", unique = true, nullable = false) 
    private Long competencyId; 

    @OneToMany(fetch = FetchType.LAZY, mappedBy = "competency") 
    private List<UserCompetency> userCompetencies = new ArrayList<>(); 

UserCompetency.class

@Entity 
@Table(name = "user_competency", schema = "public") 
@JsonIdentityInfo(
      generator = ObjectIdGenerators.IntSequenceGenerator.class, 
      property = "id") 
public class UserCompetency implements java.io.Serializable { 

    @EmbeddedId 
    @AttributeOverrides({ 
     @AttributeOverride(name = "competencyId", column = @Column(name = "competency_id", nullable = false)), 
     @AttributeOverride(name = "userId", column = @Column(name = "user_id", nullable = false)) }) 
    private UserCompetencyId id; 

    @ManyToOne(fetch = FetchType.EAGER) 
    @JoinColumn(name = "user_id", nullable = false, insertable = false, updatable = false) 
    private User user; 

    @ManyToOne(fetch = FetchType.EAGER,cascade = CascadeType.ALL) 
    @JoinColumn(name = "competency_id", nullable = false, insertable = false, updatable = false) 
    private Competency competency; 

UserCompetencyId.clas s

@Embeddable 
public class UserCompetencyId implements java.io.Serializable { 

    @Column(name = "competency_id", nullable = false) 
    private Long competencyId; 

    @Column(name = "user_id", nullable = false) 
    private Long userId; 

UserCompetencyRepository.class

@RepositoryRestResource(excerptProjection = UserCompetencyProjection.class)  
public interface UserCompetencyRepository extends JpaRepository<UserCompetency, UserCompetencyId> { 

After Implementing This ,In my case its not working to show desired jason [![enter image description here][2]][2] 

Answer 2

Ça a, en fait, je manquais d'annotation de
@RepositoryRestResource(excerptProjection = UserCompetencyProjection.class) sur la classe UserCompetencyRepository maintenant le look de sortie comme ça je saute comme il est sorti, et mettre nécessaire sortie.