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cosmetic changes

Co-authored-by: Xavier Ordoquy <xordoquy@linovia.com>
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thetarby 2020-12-31 21:43:19 +03:00 committed by GitHub
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docs/api-guide/relations.md
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@ -35,12 +35,12 @@ For example, the following serializer would lead to a database hit each time eva
fields = ['album_name', 'artist', 'tracks'] fields = ['album_name', 'artist', 'tracks']
# For each album object, tracks should be fetched from database # For each album object, tracks should be fetched from database
qs=Album.objects.all() qs = Album.objects.all()
print(AlbumSerializer(qs, many=True).data) print(AlbumSerializer(qs, many=True).data)
If `AlbumSerializer` is used to serialize a fairly large queryset with `many=True` then it could be a serious performance problem. Optimizing the queryset passed to `AlbumSerializer` with: If `AlbumSerializer` is used to serialize a fairly large queryset with `many=True` then it could be a serious performance problem. Optimizing the queryset passed to `AlbumSerializer` with:
qs=Album.objects.prefetch_related('tracks') qs = Album.objects.prefetch_related('tracks')
# No additional database hits required # No additional database hits required
print(AlbumSerializer(qs, many=True).data) print(AlbumSerializer(qs, many=True).data)