Update Lesson serializers

api/v1/serializers.py

@@ -169,8 +169,7 @@ class CourseSerializer(CourseCreateSerializer):
     gallery = GallerySerializer()
 
 
-class LessonSerializer(serializers.ModelSerializer):
+class LessonCreateSerializer(serializers.ModelSerializer):
-    cover = ImageObjectSerializer()
 
     class Meta:
         model = Lesson
@@ -187,13 +186,17 @@ class LessonSerializer(serializers.ModelSerializer):
 
         read_only_fields = (
             'id',
-            'cover',
             'content',
             'created_at',
             'update_at',
         )
 
 
+class LessonSerializer(LessonCreateSerializer):
+    course = CourseSerializer()
+    cover = ImageObjectSerializer()
+
+
 class ImageSerializer(serializers.ModelSerializer):
     img = ImageObjectSerializer()
 

api/v1/views.py

@@ -14,7 +14,7 @@ from .serializers import (
     GallerySerializer, GalleryImageSerializer, GalleryImageCreateSerializer,
     UserSerializer, UserPhotoSerializer,
     LessonSerializer, CourseCreateSerializer,
-    ImageObjectSerializer,
+    ImageObjectSerializer, LessonCreateSerializer,
 )
 from .permissions import IsAdmin, IsAdminOrIsSelf, IsAuthorOrAdmin, IsAuthorObjectOrAdmin
 
@@ -82,7 +82,11 @@ class LessonViewSet(ExtendedModelViewSet):
     queryset = Lesson.objects.select_related(
         'course', 'cover'
     ).prefetch_related('content').all()
-    serializer_class = LessonSerializer
+    serializer_class = LessonCreateSerializer
+    serializer_class_map = {
+        'list': LessonSerializer,
+        'retrieve': LessonSerializer,
+    }
     filter_fields = ('course',)
     search_fields = ('title', 'short_description',)
     ordering_fields = ('title', 'created_at', 'update_at',)