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lms/app/admin.py

@@ -10,13 +10,13 @@ class CourseAdmin(admin.ModelAdmin):
 
 @admin.register(Module)
 class ModuleAdmin(admin.ModelAdmin):
-    list_display = ('id', 'title', 'course', 'order')
+    list_display = ('id', 'title', 'course')
     search_fields = ('title', 'course__title')
     list_filter = ('course',)
 
 @admin.register(Lesson)
 class LessonAdmin(admin.ModelAdmin):
-    list_display = ('title', 'module', 'order')
+    list_display = ('title', 'module')
     search_fields = ('title', 'module__title')
     list_filter = ('module',)
 

lms/app/migrations/0010_remove_lesson_order_remove_module_order.py

@@ -0,0 +1,21 @@
+# Generated by Django 5.0.10 on 2025-01-14 17:20
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('app', '0009_lesson_description_alter_module_description'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='lesson',
+            name='order',
+        ),
+        migrations.RemoveField(
+            model_name='module',
+            name='order',
+        ),
+    ]

lms/app/models.py

@@ -35,7 +35,6 @@ class Module(models.Model):
     title = models.CharField(max_length=255, verbose_name="Module Title")
     description = models.TextField(null=True, verbose_name="Module Description")
     course = models.ForeignKey(Course, on_delete=models.CASCADE, related_name='modules', verbose_name="Course")
-    order = models.PositiveIntegerField(default=0, verbose_name="Order", unique=True)
     created_by = models.ForeignKey(User, on_delete=models.CASCADE, null=True, blank=True, verbose_name="Created By")
 
     def str(self):
@@ -48,7 +47,6 @@ class Lesson(models.Model):
     description = models.TextField(null=True, verbose_name="Lesson Description")
     content = models.TextField(verbose_name="Lesson Content")
     module = models.ForeignKey(Module, on_delete=models.CASCADE, related_name='lessons', verbose_name="Module")
-    order = models.PositiveIntegerField(default=0, verbose_name="Order")
     file = models.FileField(upload_to='lesson_files/', null=True, blank=True, verbose_name="Attached File")
     created_by = models.ForeignKey(User, on_delete=models.CASCADE, null=True, blank=True, verbose_name="Created By")
 

lms/app/permissions.py

@@ -20,6 +20,9 @@ class IsOwnerOrReadOnly(BasePermission):
                 
             case "LessonViewSet":
                 return obj.created_by == request.user
+            
+            case "EnrollmentViewSet":
+                return obj.student == request.user
                 
 
     

lms/app/serializers.py

@@ -24,20 +24,21 @@ class LessonSerializer(serializers.ModelSerializer):
 
     class Meta:
         model = Lesson
-        fields = ['id', 'title', 'description', 'content', 'module', 'order', 'file']
+        fields = ['id', 'title', 'description', 'content', 'module', 'file']
 
 
 class ModuleSerializer(serializers.ModelSerializer):
     lessons = serializers.SerializerMethodField()
     class Meta:
         model = Module
-        fields = ['id', 'title', 'description', 'lessons', 'course', 'order']
+        fields = ['id', 'title', 'description', 'lessons', 'course']
         read_only_fields = ['course', 'lessons']
         
     def get_lessons(self, obj):
         return obj.lessons.values('id', 'title', 'description')
 
 
+
 class EnrollmentSerializer(serializers.ModelSerializer):
     course_details = serializers.SerializerMethodField() 
     class Meta:

lms/app/signals.py

@@ -0,0 +1,3 @@
+from django.db.models.signals import pre_save
+from django.dispatch import receiver
+from .model import Module

lms/app/views.py

@@ -55,7 +55,7 @@ class ModuleViewSet(ModelViewSet):
         if course_id:
             course = Course.objects.filter(id=course_id).first()
             if course:
-                return Module.objects.filter(course=course).order_by('order')
+                return Module.objects.filter(course=course)
         return Module.objects.none()
 
 
@@ -65,6 +65,10 @@ class ModuleViewSet(ModelViewSet):
         """
         course_id = self.request.data.get('course')
         course = Course.objects.filter(id=course_id, owner=self.request.user).first()
+        is_owner = course.owner == self.request.user
+        if not is_owner:
+            raise PermissionDenied("You do not have permission to create module.")
+        
         if not course:
             return Response(
                 {"detail": "This course not found."},
@@ -108,9 +112,26 @@ class LessonViewSet(ModelViewSet):
         is_enrolled = Enrollment.objects.filter(course=module.course, student=self.request.user).exists()
 
         if is_owner or is_enrolled:
+            
             return Lesson.objects.filter(id=lesson_id) # Return the lesson if the user is authorized
 
         return Lesson.objects.none()  # Deny access if the user is not authorized
+        
+    def perform_create(self, serializer):
+        """
+        Customize the creation of a lesson to include the module and the user who created it.
+        """
+        module_id = self.request.data.get('module')  # Get the module ID from the request
+        module = Module.objects.filter(id=module_id).first()  # Fetch the module
+        is_owner = module.course.owner == self.request.user
+        if not is_owner:
+            raise PermissionDenied("You do not have permission to create lessons in this module.")
+
+        if not module:
+            raise serializers.ValidationError({"module": "Module does not exist."})
+
+        # Save the lesson with the module and created_by user
+        serializer.save(module=module, created_by=self.request.user)
 
 
 
@@ -120,10 +141,10 @@ class EnrollmentViewSet(ModelViewSet):
     permission_classes = [IsAuthenticated]
     http_method_names = ['get', 'post', 'delete']
     
-    def retrieve(self, request, *args, **kwargs):
-        instance = Enrollment.objects.filter(user=request.user)
+    def list(self, request, *args, **kwargs):
+        instance = Enrollment.objects.filter(student=request.user)
         
-        serializer = self.get_serializer(instance)
+        serializer = self.get_serializer(instance, many=True)
         return Response(serializer.data) 
 
 
@@ -147,15 +168,6 @@ class EnrollmentViewSet(ModelViewSet):
         serializer = self.get_serializer(enrollment)
         return Response(serializer.data, status=status.HTTP_201_CREATED)
 
-    def destroy(self, request, *args, **kwargs):
-        # Get the enrollment object to delete
-        enrollment = self.get_object()
-        if enrollment.student != request.user:
-            raise PermissionDenied("You do not have permission to delete this enrollment.")
-
-        # Delete the enrollment
-        enrollment.delete()
-        return Response({"detail": "Enrollment deleted successfully"}, status=status.HTTP_204_NO_CONTENT)
     
     
 class QuizViewSet(ModelViewSet):