Fix model mapping bug where ChapterEntity.id is erroneously set.

src/main/java/de/unistuttgart/iste/meitrex/course_service/config/ModelMapperConfiguration.java

@@ -1,6 +1,8 @@
 package de.unistuttgart.iste.meitrex.course_service.config;
 
 import org.modelmapper.ModelMapper;
+import org.modelmapper.convention.MatchingStrategies;
+import org.modelmapper.spi.MatchingStrategy;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
@@ -12,6 +14,9 @@ public class ModelMapperConfiguration {
 
     @Bean
     public ModelMapper modelMapper() {
-        return new ModelMapper();
+        ModelMapper mapper = new ModelMapper();
+        mapper.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT);
+
+        return mapper;
     }
 }

src/main/java/de/unistuttgart/iste/meitrex/course_service/persistence/mapper/ChapterMapper.java

@@ -20,7 +20,6 @@ public Chapter entityToDto(ChapterEntity chapterEntity) {
 
     public ChapterEntity dtoToEntity(CreateChapterInput chapterInput) {
         ChapterEntity entity = modelMapper.map(chapterInput, ChapterEntity.class);
-        entity.setCourseId(chapterInput.getCourseId());
         return entity;
     }
 

src/main/java/de/unistuttgart/iste/meitrex/course_service/service/ChapterService.java

@@ -12,6 +12,7 @@
 import de.unistuttgart.iste.meitrex.generated.dto.*;
 import jakarta.persistence.EntityNotFoundException;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.data.domain.*;
 import org.springframework.data.jpa.domain.Specification;
 import org.springframework.lang.Nullable;
@@ -27,6 +28,7 @@
  */
 @Service
 @RequiredArgsConstructor
+@Slf4j
 public class ChapterService {
 
     private final ChapterMapper chapterMapper;