Python Django自定义查询集和导出
我有一个定制的django queryset类,我将其与定制管理器一起使用,以轻松地使用链接过滤对象 我想将自定义方法添加到此类中,以将其结果保存为文件 然而,我不确定我是否做对了。 我怎样才能用as_file方法获取内部对象的列表Python Django自定义查询集和导出,python,django,django-models,Python,Django,Django Models,我有一个定制的django queryset类,我将其与定制管理器一起使用,以轻松地使用链接过滤对象 我想将自定义方法添加到此类中,以将其结果保存为文件 然而,我不确定我是否做对了。 我怎样才能用as_file方法获取内部对象的列表 class EntryQuerySet(models.QuerySet): def as_file(self, filename='export.xls'): # data = ??? how can I get results here??
class EntryQuerySet(models.QuerySet):
def as_file(self, filename='export.xls'):
# data = ??? how can I get results here??? print('exporting as {}'.format(filename))
def active(self):
return self.filter(status__in=[1, 4, 5])
def with_email(self):
return self.filter(contact__email__isnull=False)
def by_city(self, city):
return self.filter(address__city__icontains=city)
def in_next_days(self, days=7):
now = datetime.datetime.today()
delta = now + relativedelta.relativedelta(days=days)
return self.filter(start_date__gte=now, start_date__lte=delta)
def in_last_days(self, days=7):
now = datetime.datetime.today()
delta = now - relativedelta.relativedelta(days=days)
return self.filter(start_date__gte=delta, start_date__lte=now)
class EntryManager(models.Manager):
def get_queryset(self):
return EntryQuerySet(self.model, using=self._db)
def active(self):
return self.get_queryset().active()
def by_city(self, city):
return self.get_queryset().by_city(city)
def with_email(self):
return self.get_queryset().with_email()
def in_next_days(self, days):
return self.get_queryset().in_next_days(days)
def in_last_days(self, days):
return self.get_queryset().in_last_days(days)
我的用法如下:
entries = Entry.objects.active().by_city('My city').in_next_days(5)
我想要像这样的东西:
entries = Entry.objects.active().by_city('My city').in_next_days(5).as_file('myfilename.xls')
我怎样才能做到这一点呢?事实上,我发现跑步很简单:
def as_file(self, filename='eksport.xls'):
data = self.all()
#do some processing here