code cleanup

courses/videos/serializers.py

@@ -5,17 +5,11 @@ from .models import Video
 
 class VideoSerializer(serializers.ModelSerializer):
 
-    file = serializers.FileField(read_only=True)
-
     class Meta:
         model = Video
         fields = ('id', 'name', 'youtube_id', 'file',)
+        read_only_fields = ('file',)
 
-    #def get_file(self, obj):
-    #    with fallbacks(False):
-    #        files = VideoFileSerializer(required=False, allow_null=True, read_only=True, **{'context': self.context}).data
-    #        files = [f for f in files if f['file'] != None]
-    #        return files
 
 class VideoFileSerializer(serializers.ModelSerializer):