Добавил для групп поле численности.

В модалку на UI добавил отображение численности групп и вместимости аудиторий, проверку на доступность и вместимость.

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

@@ -32,6 +32,7 @@ public class GroupController {
                 .map(g -> new GroupResponse(
                         g.getId(),
                         g.getName(),
+                        g.getGroupSize(),
                         g.getEducationForm().getId(),
                         g.getEducationForm().getName()))
                 .toList();
@@ -45,6 +46,9 @@ public class GroupController {
         if (groupRepository.findByName(request.getName().trim()).isPresent()) {
             return ResponseEntity.badRequest().body(Map.of("message", "Группа с таким названием уже существует"));
         }
+        if (request.getGroupSize() == null) {
+            return ResponseEntity.badRequest().body(Map.of("message", "Численность группы обязательна"));
+        }
         if (request.getEducationFormId() == null) {
             return ResponseEntity.badRequest().body(Map.of("message", "Форма обучения обязательна"));
         }
@@ -56,12 +60,14 @@ public class GroupController {
 
         StudentGroup group = new StudentGroup();
         group.setName(request.getName().trim());
+        group.setGroupSize(request.getGroupSize());
         group.setEducationForm(efOpt.get());
         groupRepository.save(group);
 
         return ResponseEntity.ok(new GroupResponse(
                 group.getId(),
                 group.getName(),
+                group.getGroupSize(),
                 group.getEducationForm().getId(),
                 group.getEducationForm().getName()));
     }

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

@@ -3,6 +3,7 @@ package com.magistr.app.dto;
 public class CreateGroupRequest {
 
     private String name;
+    private Long groupSize;
     private Long educationFormId;
 
     public String getName() {
@@ -13,6 +14,14 @@ public class CreateGroupRequest {
         this.name = name;
     }
 
+    public Long getGroupSize() {
+        return groupSize;
+    }
+
+    public void setGroupSize(Long groupSize) {
+        this.groupSize = groupSize;
+    }
+
     public Long getEducationFormId() {
         return educationFormId;
     }

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

@@ -4,12 +4,14 @@ public class GroupResponse {
 
     private Long id;
     private String name;
+    private Long groupSize;
     private Long educationFormId;
     private String educationFormName;
 
-    public GroupResponse(Long id, String name, Long educationFormId, String educationFormName) {
+    public GroupResponse(Long id, String name, Long groupSize, Long educationFormId, String educationFormName) {
         this.id = id;
         this.name = name;
+        this.groupSize = groupSize;
         this.educationFormId = educationFormId;
         this.educationFormName = educationFormName;
     }
@@ -22,6 +24,10 @@ public class GroupResponse {
         return name;
     }
 
+    public Long getGroupSize() {
+        return groupSize;
+    }
+
     public Long getEducationFormId() {
         return educationFormId;
     }

backend/src/main/java/com/magistr/app/model/StudentGroup.java

@@ -13,6 +13,9 @@ public class StudentGroup {
     @Column(unique = true, nullable = false, length = 100)
     private String name;
 
+    @Column(name = "group_size", nullable = false)
+    private Long groupSize;
+
     @ManyToOne(optional = false)
     @JoinColumn(name = "education_form_id", nullable = false)
     private EducationForm educationForm;
@@ -36,6 +39,14 @@ public class StudentGroup {
         this.name = name;
     }
 
+    public Long getGroupSize() {
+        return groupSize;
+    }
+
+    public void setGroupSize(Long groupSize) {
+        this.groupSize = groupSize;
+    }
+
     public EducationForm getEducationForm() {
         return educationForm;
     }