How to return custom JSON output in Django REST Framework

Question

I am trying to return custom json with the following structure

[ { 
'yesterday': [{'teams': "team a -team b", 'start_time': "0: 11", 'pick': "X2", 'score': "1:4", 'odds': 1.25, 'won_or_lost': "won", 'date': "2019-01-8"}],

'today': [{'teams': "team a -team b", 'start_time': "0: 11", 'pick': "X2", 'score': "1:4", 'odds': 1.25, 'won_or_lost': "won", 'date': "2019-01-8"}],

'tomorrow': [{'teams': "team a -team b", 'start_time': "0: 11", 'pick': "X2", 'score': "1:4", 'odds': 1.25, 'won_or_lost': "won", 'date': "2019-01-8"}]
}]

The following is my code:

serializer.py

class GamesSerializer(serializers.Serializer):
    class Meta:
        model = AllGames
        fields = ('teams', 'start_time', 'pick',
                  'score', 'odds', 'won_or_lost', 'date')


class GamesViewSet(viewsets.ModelViewSet):
    today_date = date_picker

    yesterday = AllGames.objects.filter(
        date=today_date(-1)).order_by('start_time', 'teams')
    today = AllGames.objects.filter(
        date=today_date(0)).order_by('start_time', 'teams')
    tomorrow = AllGames.objects.filter(
        date=today_date(1)).order_by('start_time', 'teams')

    queryset = [yesterday, today, tomorrow]
    serializer_class = GamesSerializer

Current Output

[
    {},
    {},
    {}
]

How can I modify my GamesSerializer to return the custom output as shown above.

alter123 · Accepted Answer · 2019-11-05 13:42:55Z

2

You can convert your response class from DRF ModelViewSet to ViewSet. Then you can further parse your data before returning response, by overriding retrieve

As mentioned here: https://www.django-rest-framework.org/api-guide/viewsets/#example

answered Nov 5, 2019 at 13:42

alter123

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Comments

dennohpeter · Accepted Answer · 2019-11-06 12:10:19Z

For anyone trying to find the answer for this I used Viewset instead of ModelViewSet as suggested by @jay-vasant and then overrode list method above to customize the output like I wanted. This is my GamesViewSet after update.

class GamesViewSet(viewsets.ViewSet):
def list(self, request):
    today_date = date_picker

    yesterday = AllGames.objects.filter(
        date=today_date(-1)).order_by('start_time', 'teams')
    today = AllGames.objects.filter(
        date=today_date(0)).order_by('start_time', 'teams')
    tomorrow = AllGames.objects.filter(
        date=today_date(1)).order_by('start_time', 'teams')

    queryset = [yesterday, today, tomorrow]
    games = []
    for day in queryset:
        serializer = GamesSerializer(day, many=True)
        games.append(serializer.data)
    return Response(games)

Output I get there after.

[
    [{'teams': "team a -team b", 'start_time': "0: 11", 'pick': "X2", 'score': "1:4", 'odds': 1.25, 'won_or_lost': "won", 'date': "2019-01-8"}],

    [{'teams': "team a -team b", 'start_time': "0: 11", 'pick': "X2", 'score': "1:4", 'odds': 1.25, 'won_or_lost': "won", 'date': "2019-01-8"}],
    [{'teams': "team a -team b", 'start_time': "0: 11", 'pick': "X2",'score': "1:4", 'odds': 1.25, 'won_or_lost': "won", 'date': "2019-01-8"}]
 ]

Which is now close to what I wanted.

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