вроде работает

demo/src/main/java/com/example/demo/games/api/GameDTO.java

@@ -16,7 +16,6 @@ public class GameDTO {
     public void setName(String name){
         this.name = name;
     }
-    @JsonProperty(access = JsonProperty.Access.READ_ONLY)
     public Long getId(){
         return id;
     }

demo/src/main/java/com/example/demo/tables/api/TableController.java

@@ -1,8 +1,12 @@
 package com.example.demo.tables.api;
 
 import com.example.demo.core.config.Constants;
+import com.example.demo.games.api.GameDTO;
+import com.example.demo.games.model.GameEntity;
 import com.example.demo.tables.model.TableEntity;
 import com.example.demo.tables.service.TableService;
+import com.example.demo.users.api.UserDTO;
+import com.example.demo.users.model.UserEntity;
 import jakarta.validation.Valid;
 import org.modelmapper.ModelMapper;
 import org.springframework.web.bind.annotation.*;
@@ -22,10 +26,21 @@ public class TableController {
     }
 
     private TableDTO toDTO(TableEntity entity) {
-        return modelMapper.map(entity, TableDTO.class);
+        return new TableDTO(
+                entity.getDescription(),
+                entity.getDate(),
+                modelMapper.map(entity.getCreator(), UserDTO.class),
+                modelMapper.map(entity.getGame(), GameDTO.class),
+                entity.getGamers().stream().map(e -> modelMapper.map(e, UserDTO.class)).toList()
+        );
     }
     private TableEntity toEntity(TableDTO dto){
-        return modelMapper.map(dto, TableEntity.class);
+        TableEntity entity = modelMapper.map(dto, TableEntity.class);
+        entity.setCreator(modelMapper.map(dto.getCreator(), UserEntity.class));
+        entity.setGame(modelMapper.map(dto.getGame(), GameEntity.class));
+        entity.setGamers(dto.getGamers().stream()
+                .map(u -> modelMapper.map(u, UserEntity.class)).toList());
+        return entity;
     }
 
     @GetMapping

demo/src/main/java/com/example/demo/tables/api/TableDTO.java

@@ -23,6 +23,14 @@ public class TableDTO {
     private GameDTO game;
     private List<UserDTO> gamers;
 
+    public TableDTO(String description, Date date, UserDTO creator, GameDTO game, List<UserDTO> gamers){
+        this.description = description;
+        this.date = date;
+        this.creator = creator;
+        this.game = game;
+        this.gamers = gamers;
+    }
+
     public String getDescription(){
         return description;
     }
@@ -37,7 +45,7 @@ public class TableDTO {
         this.date = date;
     }
 
-    public UserDTO geyCreator(){
+    public UserDTO getCreator(){
         return creator;
     }
     public void setCreator(UserDTO creator){
@@ -57,7 +65,6 @@ public class TableDTO {
     public void setGamers(List<UserDTO> gamers){
         this.gamers = gamers;
     }
-    @JsonProperty(access = JsonProperty.Access.READ_ONLY)
     public Long getId(){
         return id;
     }

demo/src/main/java/com/example/demo/tables/model/TableEntity.java

@@ -4,7 +4,6 @@ import com.example.demo.core.model.BaseEntity;
 import com.example.demo.games.model.GameEntity;
 import com.example.demo.users.model.UserEntity;
 
-import java.time.Period;
 import java.util.Date;
 import java.util.List;
 
@@ -38,7 +37,7 @@ public class TableEntity extends BaseEntity {
         this.date = date;
     }
 
-    public UserEntity geyCreator(){
+    public UserEntity getCreator(){
         return creator;
     }
     public void setCreator(UserEntity creator){

demo/src/main/java/com/example/demo/tables/service/TableService.java

@@ -35,6 +35,23 @@ public class TableService {
                 .orElseThrow(() -> new NotFoundException(id));
     }
     public TableEntity create(TableEntity entity){
+        entity.setCreator(
+                entity.getCreator() == null ?
+                        entity.getCreator() :
+                        userService.get(entity.getCreator().getId()));
+
+        entity.setGamers(
+                entity.getGamers().isEmpty() ?
+                        entity.getGamers() :
+                        entity.getGamers()
+                                .stream()
+                                .map(g -> userService.get(g.getId()))
+                                .toList()
+        );
+        entity.setGame(
+                entity.getGame().getId() == null ?
+                        entity.getGame() :
+                        (gameService.get(entity.getGame().getId())));
         return repository.create(entity);
     }
 
@@ -46,6 +63,11 @@ public class TableService {
                 entity.getDescription().isEmpty() ? existEntity.getDescription() : entity.getDescription()
         );
 
+        existEntity.setCreator(
+                entity.getCreator() == null ?
+                existEntity.getCreator() :
+                userService.get(entity.getCreator().getId()));
+
         existEntity.setGamers(
                 entity.getGamers().isEmpty() ?
                 existEntity.getGamers() :

demo/src/main/java/com/example/demo/users/api/UserDTO.java

@@ -34,7 +34,6 @@ public class UserDTO {
     public void setPassword(String password){
         this.password = password;
     }
-    @JsonProperty(access = JsonProperty.Access.READ_ONLY)
     public Long getId(){
         return id;
     }