@Query例子

backend/src/main/java/com/qqchen/deploy/backend/entity/Menu.java

@@ -59,11 +59,4 @@ public class Menu extends Entity<Long> {
     @ToString.Exclude
     private Set<RoleMenu> roleMenus = new HashSet<>();
 
-    // 便捷方法：获取所有关联的角色
-    @Transient
-    public Set<Role> getRoles() {
-        return roleMenus.stream()
-            .map(RoleMenu::getRole)
-            .collect(Collectors.toSet());
-    }
 }

backend/src/main/java/com/qqchen/deploy/backend/entity/RoleMenu.java

@@ -35,7 +35,8 @@ public class RoleMenu extends Entity<Long> {
     @ToString.Exclude
     private Menu menu;
 
-    protected RoleMenu() {}
+    protected RoleMenu() {
+    }
 
     public RoleMenu(Role role, Menu menu) {
         this.role = role;

backend/src/main/java/com/qqchen/deploy/backend/repository/IRoleMenuRepository.java

@@ -11,7 +11,8 @@ import java.util.List;
 @Repository
 public interface IRoleMenuRepository extends IBaseRepository<RoleMenu, Long> {
 
-//    List<RoleMenu> findByRoleId(Long roleId);
+    @Query("SELECT rm.role FROM RoleMenu rm where rm.role.id = :roleId")
+    List<RoleMenu> findByRoleId(Long roleId);
 //
 //    void deleteByRoleId(Long roleId);
 //