implemented solution

src/main/java/mate/academy/rickandmorty/controller/CharacterController.java

@@ -2,12 +2,10 @@
 
 import java.util.List;
 import lombok.RequiredArgsConstructor;
-import mate.academy.rickandmorty.dto.CharacterDto;
 import mate.academy.rickandmorty.dto.ResponseDto;
 import mate.academy.rickandmorty.service.CharacterService;
 import org.springframework.data.domain.Pageable;
 import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
@@ -24,7 +22,7 @@ public List<ResponseDto> getCharactersByName(@RequestParam String name, Pageable
     }
 
     @GetMapping("/random")
-    public CharacterDto getRandomCharacter(@PathVariable Long id) {
+    public ResponseDto getRandomCharacter() {
         return service.getRandomCharacter();
     }
 }

src/main/java/mate/academy/rickandmorty/dto/ExternalCharacterDto.java

@@ -4,23 +4,13 @@
 import com.fasterxml.jackson.annotation.JsonProperty;
 import lombok.Data;
 
-import java.util.List;
-
-@JsonIgnoreProperties(ignoreUnknown = true)
 @Data
+@JsonIgnoreProperties(ignoreUnknown = true)
 public class ExternalCharacterDto {
     private Long id;
     private String name;
     private String status;
-    private String species;
-    private String type;
     private String gender;
-    private List<String> origin;
-    private List<String> location;
-    private String image;
-    private List<String> episode;
-    private String url;
-    private String created;
 
     @JsonProperty("id")
     public Long getExternalId() {

src/main/java/mate/academy/rickandmorty/dto/ResponseDto.java

@@ -1,9 +1,14 @@
 package mate.academy.rickandmorty.dto;
 
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+import lombok.Data;
+
+@Data
+@JsonPropertyOrder({"id", "externalId", "name", "status", "gender"})
 public class ResponseDto {
     private Long id;
     private String externalId;
     private String name;
     private String status;
     private String gender;
-}
+}

src/main/java/mate/academy/rickandmorty/mapper/CharacterMapper.java

@@ -7,16 +7,23 @@
 import mate.academy.rickandmorty.model.Character;
 import org.mapstruct.Mapper;
 import org.mapstruct.Mapping;
+import org.mapstruct.Mappings;
 import org.springframework.stereotype.Component;
 
 @Mapper(config = MapperConfig.class)
 @Component
 public interface CharacterMapper {
-    public CharacterDto toDto(Character character);
+    CharacterDto toCharacterDto(Character character);
 
-    @Mapping(target = "externalId", source = "id")
-    @Mapping(target = "id", ignore = true)
+    @Mappings({
+            @Mapping(target = "externalId", source = "id"),
+            @Mapping(target = "id", ignore = true) // DB auto-generated ID
+    })
     Character toEntity(ExternalCharacterDto dto);
 
+    @Mappings({
+            @Mapping(target = "externalId", source = "externalId"),
+            @Mapping(target = "id", source = "id")
+    })
     ResponseDto toResponseDto(Character character);
 }

src/main/java/mate/academy/rickandmorty/model/Character.java

@@ -8,8 +8,8 @@
 import lombok.Data;
 
 @Entity
-@Data
 @Table(name = "characters")
+@Data
 public class Character {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)

src/main/java/mate/academy/rickandmorty/service/CharacterService.java

@@ -1,12 +1,11 @@
 package mate.academy.rickandmorty.service;
 
 import java.util.List;
-import mate.academy.rickandmorty.dto.CharacterDto;
 import mate.academy.rickandmorty.dto.ResponseDto;
 import org.springframework.data.domain.Pageable;
 
 public interface CharacterService {
     List<ResponseDto> getCharactersByName(String name, Pageable pageable);
 
-    CharacterDto getRandomCharacter();
+    ResponseDto getRandomCharacter();
 }

src/main/java/mate/academy/rickandmorty/service/impl/CharacterServiceImpl.java

@@ -3,7 +3,6 @@
 import java.util.List;
 import java.util.Random;
 import lombok.RequiredArgsConstructor;
-import mate.academy.rickandmorty.dto.CharacterDto;
 import mate.academy.rickandmorty.dto.ResponseDto;
 import mate.academy.rickandmorty.exception.EntityNotFoundException;
 import mate.academy.rickandmorty.mapper.CharacterMapper;
@@ -29,8 +28,8 @@ public List<ResponseDto> getCharactersByName(String name, Pageable pageable) {
     }
 
     @Override
-    public CharacterDto getRandomCharacter() {
-        return mapper.toDto(repository.findById(random.nextLong(countCharactersInDb()))
+    public ResponseDto getRandomCharacter() {
+        return mapper.toResponseDto(repository.findById(random.nextLong(countCharactersInDb()))
                 .orElseThrow(() -> new EntityNotFoundException(
                         "Failed to get random Character from DB")));
     }