Добавил еще немного

backend/src/main/java/com/magistr/app/controller/TestController.java

@@ -56,8 +56,12 @@ public class TestController {
     @GetMapping
     public List<LessonResponse> getAllLessons() {
         return lessonRepository.findAll().stream()
-                .map(l -> new LessonResponse(l.getTeacherId(), l.getLessonId(), l.getDay(), l.getWeek(), l.getTime()))
+                .map(l -> new LessonResponse(l.getId(), l.getTeacherId(), l.getLessonId(), l.getDay(), l.getWeek(), l.getTime()))
                 .toList();
     }
 
+    @GetMapping("/ping")
+    public String ping() {
+        return "pong";
+    }
 }

backend/src/main/java/com/magistr/app/dto/LessonResponse.java

@@ -2,6 +2,7 @@ package com.magistr.app.dto;
 
 public class LessonResponse {
 
+    private Long id;
     private Long teacherId;
     private Long groupId;
     private Long lessonId;
@@ -19,7 +20,8 @@ public class LessonResponse {
         this.time = time;
     }
 
-    public LessonResponse(Long teacherId, Long lessonId, String day, String week, String time) {
+    public LessonResponse(Long id, Long teacherId, Long lessonId, String day, String week, String time) {
+        this.id = id;
         this.teacherId = teacherId;
         this.lessonId = lessonId;
         this.day = day;
@@ -27,6 +29,14 @@ public class LessonResponse {
         this.time = time;
     }
 
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
     public Long getTeacherId() {
         return teacherId;
     }