Django 2.7 Rest API Validation Request

Question

I use Django 2.7 to build Rest API application, and having problem to validate/clean the request data from client for get detail transaction (Not Save/update). for example the request data trx_no cannot less than 5 char length. where's the validation class i should create? should I validate on Model.py or using forms, or in serializer? Here's my models.py:

class mst_trx(models.Model):
    trx_no = models.CharField(max_length=20,primary_key=True)

Here's my views.py:

class views_index(APIView):

def post(self,request):
    action = request.POST['action']

    if action == 'detail' :
        resp = detail.as_view()(request)


class detail(APIView):
    def dispatch(self,request): 

    ##I want to validate first before get data
    try:
        detail = mst_trx.objects.select_related().get(pk=request.POST['trx_no'])
    except mst_trx.DoesNotExist:
        raise Http404("Transaction does not exist")
    else:
        serializer = TrxDetailSerializer(detail)
        return serializer.data

And Here's my serializer.py :

class TrxDetailSerializer(serializers.ModelSerializer):
    class Meta:
        model = mst_trx
        fields = ('trx_no')

emme · Accepted Answer · 2017-01-19 06:00:04Z

1

Validation logic should be in forms.py file

for e.g.

def clean_columnname(self):
    columnname = self.cleaned_data['columnname']
    if len(columnname) < 1:
        raise ValidationError('Please add some content  ...')
    elif len(columnname) > 500000:
        raise ValidationError('Too many characters ...')
    return columnname

answered Jan 19, 2017 at 6:00

emme

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1 Comment

emme Over a year ago

@dennysaputra You just need to call isValid() for your form and clean_fieldname will be called. form = YourForm(request.POST) form.is_valid() For more details you can refer official doc

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