Change category field of publication entity to its id.

codiki-infrastructure/src/main/java/org/codiki/infrastructure/publication/model/PublicationEntity.java

@@ -39,12 +39,11 @@ public class PublicationEntity {
     private ZonedDateTime creationDate;
     @Column(nullable = false)
     private UUID illustrationId;
+    @Column(nullable = false)
+    private UUID categoryId;
     @ManyToOne(fetch = LAZY)
     @JoinColumn(name = "author_id")
     private AuthorEntity author;
-    @ManyToOne(fetch = LAZY)
-    @JoinColumn(name = "category_id")
-    private CategoryEntity category;
 
     public PublicationEntity(Publication publication) {
         this(
@@ -55,8 +54,8 @@ public class PublicationEntity {
             publication.description(),
             publication.creationDate(),
             publication.illustrationId(),
-            new AuthorEntity(publication.author()),
-            new CategoryEntity(publication.category())
+            publication.categoryId(),
+            new AuthorEntity(publication.author())
         );
     }
 
@@ -69,8 +68,8 @@ public class PublicationEntity {
             description,
             creationDate,
             illustrationId,
-            author.toDomain(),
-            category.toDomain()
+            categoryId,
+            author.toDomain()
         );
     }
 }

codiki-infrastructure/src/main/java/org/codiki/infrastructure/publication/repository/PublicationRepository.java

@@ -13,7 +13,6 @@ public interface PublicationRepository extends JpaRepository<PublicationEntity,
         SELECT p
         FROM PublicationEntity p
         JOIN FETCH p.author a
-        JOIN FETCH p.category c
         WHERE p.id = :publicationId
         """)
     Optional<PublicationEntity> findById(@Param("publicationId") UUID publicationId);