我如何过滤 Json 响应，仅使用 Djangorestframework 中的 DateFilter 将 Year 参数传递给 DateTime 字段

Question

i need a json response just by entering the year in parameter instead of date Note: i have around 25 columns of data in db so looking for simple solution Thanks

models.py:
    '''class indicator(models.Model):
        fiscalyearend = models.DateField(db_column='FiscalYearEnd') 
    
    serializers.py:
    
    class IndicatorSerializer(serializers.ModelSerializer):
    
        class Meta:
            model = indicator
            fields = ['fiscalyearend']
    
    views.py
    filters:
    
       class indicatorDataBaseListView1Filter(filters.FilterSet):
        fiscalyearend = filters.DateFilter('fiscalyearend',label=('With start date'),lookup_expr='contains')
    
    
    view
    
       class indicatorView1(generics.ListAPIView):
        serializer_class = KeyperformanceindicatorSerializer
        queryset = Indicator.objects.all() #vice versa for get_queryset method
        filter_backends = (DjangoFilterBackend,OrderingFilter,SearchFilter)
        filterset_class = indicatorDataBaseListView1Filter'''
    
    
    url : localhost:8000/indicator/?fiscalyearend=2019
    
    json output : enter a valid date 
    
    my current date formate is 2019-01-01
    
    
     i need to filter the json just by entering the year in the url instead of entire date

Answer 1

If you look up only using parameter year or month , you can use django_filters.NumberFilter , then it will magically work on your localhost:8000/indicator/?fiscalyearend=2019 , same for filtering the month

class indicatorDataBaseListView1Filter(django_filters.FilterSet):
    # field name <fiscalyearend> will eventually used as query parameter?<field_name>
    fiscalyearend = django_filters.NumberFilter(field_name= 'fiscalyearend', lookup_expr='year')

VIEWS

class indicatorView1(generics.ListAPIView):
    serializer_class = KeyperformanceindicatorSerializer
    queryset = Indicator.objects.all() #vice versa for get_queryset method
    filter_backends = (DjangoFilterBackend,OrderingFilter,SearchFilter)
    # note: filter_class 
    filter_class = indicatorDataBaseListView1Filter