Save value in one field depending on the value of another field in Rest Framework

Question

Save value in one field depending on the value of another field in Rest Framework

Navigation

#1 by (0 votes)

0

Good morning

I am trying to change what I have done in forms to serializers and I find that with forms, depending on a date that is entered, it calculates another date for another field.

I have seen that the SerializedMethodField does what I need but it does not work to save data, what other options do I have?

FechaValidoHasta = serializers.SerializerMethodField()

    def get_FechaValidoHasta(self, obj):
        seisMeses = relativedelta(months=6)
        return obj.FechaValidoDesde+seisMeses

It seems like it could be using Custom Fields, but I do not see how to reference the other field when calculating the date.

Thanks!

django djangorestframework

asked by Cecilio Alonso 18.12.2017 в 09:39

source

1 answer

Stripe and google endpoints Error passing object by FormData and POST

score 0 · Accepted Answer

After researching it, I do not see clearly that Rest Framework has implemented this in the part related to the serializers. If I am wrong and if it includes it, please provide a new answer. To fix it in another way, what I have done is overwrite the methods perform_update and perform_create in the ModelViewSet, in the file views.py, taking the value of the other field from self.resquest.POST ['ValidDate') and thus be able to calculate the Value of Date ValueUp. In the file serializers.py, this case, it is not necessary to indicate anything special.

#views.py

class CertificadoBackendListAPI(viewsets.ModelViewSet):
    queryset = Certificado.objects.all()
    serializer_class = CertificadoEditSerializer

    def perform_create(self, serializer):
        seisMeses = relativedelta(months=6)
        Fecha=datetime.strptime(self.request.POST['FechaValidoDesde'],'%Y-%m-%d')+seisMeses 
        serializer.save(FechaValidoHasta=datetime.date(Fecha))

    def perform_update(self, serializer):
        seisMeses = relativedelta(months=6)
        Fecha=datetime.strptime(self.request.POST['FechaValidoDesde'],'%Y-%m-%d')+seisMeses 
        serializer.save(FechaValidoHasta=datetime.date(Fecha))