Django and python notes

[django-python-notes]

Hi, i am creator django-python-notes blog. Sorry, i forgot this blog over a year ago. I want to ask something of you. You want to see new notes in the blog?

[django-python-notes]

request.user returns a SimpleLazyObject

if hasattr(user, '_wrapped') and hasattr(user, '_setup'):

            if user._wrapped.__class__ == object:

                user._setup()

            user = user._wrapped

[django-python-notes]

Queryset + Queryset

querysets = queryset1 | queryset2

[django-python-notes]

Making queries "time"

Article.objects.filter(time__year=2013, time__month=4, time__day=10)

[django-python-notes]

Making queries "starts with"

SomeModel.objects.filter(name__startswith='test_')

[django-python-notes]

Example APIView

class SomeView(APIView): serializer_class = SomeSerializer def post(self, request): serializer = self.get_serializer(data=request.DATA) if serializer.is_valid(): return Response({'some_data': '9000'}) return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST) class SomeSerializer(serializers.Serializer): field = serializers.CharField(max_length=255) def validate(self, attrs): field = attrs.get('field') if len(field) < 10: raise serializers.ValidationError('Filed too small!') if field == 'Duck': raise serializers.ValidationError('No duck') return attrs

[django-python-notes]

Pagination in the generic views

class PaginatedListView(ListAPIView): model = ExampleModel serializer_class = ExampleSerializer paginate_by = 10 paginate_by_param = 'page_size'

[django-python-notes]

Serializer method field or not model field

class MySerializer(serializers.ModelSerializer): name = serializers.SerializerMethodField('get_name') def get_name(self, obj): return '%s %s' % (obj.firstname, obj.lastname) class Meta: model = SomeModel fields = ('firstname', 'lastname', 'avatar')