Fix recursion error

api/v1/serializers/course.py

@@ -291,11 +291,32 @@ class LessonCreateSerializer(serializers.ModelSerializer):
         return LessonSerializer(instance, context=self.context).to_representation(instance)
 
 
-class LessonSerializer(LessonCreateSerializer):
+class LessonSerializer(serializers.ModelSerializer):
     # course = CourseSerializer()
     cover = ImageObjectSerializer()
     content = ContentSerializer(many=True)
 
+    class Meta:
+        model = Lesson
+        fields = (
+            'id',
+            'title',
+            'short_description',
+            'course',
+            'cover',
+            'content',
+            'created_at',
+            'update_at',
+            'deactivated_at',
+        )
+
+        read_only_fields = (
+            'id',
+            'created_at',
+            'update_at',
+            'deactivated_at',
+        )
+
 
 class CourseSerializer(CourseCreateSerializer):
     author = UserSerializer()