如何将查询参数传递给 django rest 框架中的 SerializerMethodField?
How to pass a query parameter to SerializerMethodField in django rest framework?
我想根据我在 GET 调用中获得的查询参数过滤掉一些实例。
class RevisionSerializer(serializers.ModelSerializer):
slot_info = serializers.SerializerMethodField(required=False, read_only=True)
batch_config = serializers.SerializerMethodField(required=False, read_only=True)
class Meta:
model = Revision
fields = ['id', 'status', 'revision_id', 'instructor', 'number_of_classes', 'start_date',
'slot', 'slot_info', 'tinyurl', 'zoom_link', 'batch_config']
read_only_fields = ['revision_id']
def get_batch_config(self, obj):
# filter this on the incoming data from the GET call
related_batches = CompensationClass.objects.select_related('style', 'instructor').filter(
compensation_class_id=obj.revision_id)
batch_config_values = related_batches.values('batch_id', 'age_group', 'level', 'course_version', 'style__name',
'class_number')
return batch_config_values
这是我的序列化器,我将传递一个日期,并根据该日期过滤我的序列化器方法字段。我怎样才能做到这一点?
您可以使用其上下文将参数传递给序列化程序:
# views.py
class RevisionView(GenericAPIView):
serializer_class = RevisionSerializer
def get_serializer_context(self):
return {'revision_id': self.request.GET.get('revision_id')}
# serializers.py
class RevisionSerializer(serializers.ModelSerializer):
def get_batch_config(self, obj):
related_batches = CompensationClass.objects.select_related('style', 'instructor').filter(
compensation_class_id=self.context.get('revision_id'))
感谢@ThomasGth。我是这样做的。
串行器
class RevisionSerializer(serializers.ModelSerializer):
slot_info = serializers.SerializerMethodField(required=False, read_only=True)
batch_config = serializers.SerializerMethodField(required=False, read_only=True,
)
class Meta:
model = Revision
# fields = '__all__'
fields = ['id', 'status', 'revision_id', 'instructor', 'number_of_classes', 'start_date',
'slot', 'slot_info', 'tinyurl', 'zoom_link', 'batch_config']
read_only_fields = ['revision_id']
def get_batch_config(self, obj):
calendar_date = self.context.get('calendar_date')
related_batches = CompensationClass.objects.select_related('style', 'instructor').filter(
compensation_class_id=obj.revision_id)
if calendar_date:
related_batches = related_batches.filter(calendar_date)
batch_config_values = related_batches.values('batch_id', 'age_group', 'level', 'course_version', 'style__name',
'class_number')
return batch_config_values
VIEWSET
class RevisionViewset(viewsets.ModelViewSet):
queryset = Revision.objects.all().order_by('-modified_at').select_related('instructor', 'slot')
serializer_class = RevisionSerializer
pagination_class = LimitOffsetPagination
filter_backends = [DjangoFilterBackend, filters.SearchFilter]
filterset_class = RevisionFilter
def get_serializer_context(self):
context = {'request': self.request}
calendar_date = self.request.GET.get('calendar_date')
if calendar_date:
context['calendar_date'] = calendar_date
return context
我想根据我在 GET 调用中获得的查询参数过滤掉一些实例。
class RevisionSerializer(serializers.ModelSerializer):
slot_info = serializers.SerializerMethodField(required=False, read_only=True)
batch_config = serializers.SerializerMethodField(required=False, read_only=True)
class Meta:
model = Revision
fields = ['id', 'status', 'revision_id', 'instructor', 'number_of_classes', 'start_date',
'slot', 'slot_info', 'tinyurl', 'zoom_link', 'batch_config']
read_only_fields = ['revision_id']
def get_batch_config(self, obj):
# filter this on the incoming data from the GET call
related_batches = CompensationClass.objects.select_related('style', 'instructor').filter(
compensation_class_id=obj.revision_id)
batch_config_values = related_batches.values('batch_id', 'age_group', 'level', 'course_version', 'style__name',
'class_number')
return batch_config_values
这是我的序列化器,我将传递一个日期,并根据该日期过滤我的序列化器方法字段。我怎样才能做到这一点?
您可以使用其上下文将参数传递给序列化程序:
# views.py
class RevisionView(GenericAPIView):
serializer_class = RevisionSerializer
def get_serializer_context(self):
return {'revision_id': self.request.GET.get('revision_id')}
# serializers.py
class RevisionSerializer(serializers.ModelSerializer):
def get_batch_config(self, obj):
related_batches = CompensationClass.objects.select_related('style', 'instructor').filter(
compensation_class_id=self.context.get('revision_id'))
感谢@ThomasGth。我是这样做的。
串行器
class RevisionSerializer(serializers.ModelSerializer):
slot_info = serializers.SerializerMethodField(required=False, read_only=True)
batch_config = serializers.SerializerMethodField(required=False, read_only=True,
)
class Meta:
model = Revision
# fields = '__all__'
fields = ['id', 'status', 'revision_id', 'instructor', 'number_of_classes', 'start_date',
'slot', 'slot_info', 'tinyurl', 'zoom_link', 'batch_config']
read_only_fields = ['revision_id']
def get_batch_config(self, obj):
calendar_date = self.context.get('calendar_date')
related_batches = CompensationClass.objects.select_related('style', 'instructor').filter(
compensation_class_id=obj.revision_id)
if calendar_date:
related_batches = related_batches.filter(calendar_date)
batch_config_values = related_batches.values('batch_id', 'age_group', 'level', 'course_version', 'style__name',
'class_number')
return batch_config_values
VIEWSET
class RevisionViewset(viewsets.ModelViewSet):
queryset = Revision.objects.all().order_by('-modified_at').select_related('instructor', 'slot')
serializer_class = RevisionSerializer
pagination_class = LimitOffsetPagination
filter_backends = [DjangoFilterBackend, filters.SearchFilter]
filterset_class = RevisionFilter
def get_serializer_context(self):
context = {'request': self.request}
calendar_date = self.request.GET.get('calendar_date')
if calendar_date:
context['calendar_date'] = calendar_date
return context