鉴于这个简单的代码,我在其中声明了一个类和一个函数。在主要我尝试调用该函数,但没有进行调用。我没有收到任何错误,但如果我打印一个打印件,以便知道调用是否发生了什么。
class Balance(Document):
gross_balance = FloatField(required=True, min_value=0, default=0)
@classmethod
def createBalance(cls, gross_balance):
result = yield Balance.objects.create(gross_balance = gross_balance)
result.save()
@classmethod
def sayHi(cls):
print "Hi there"
from models import Balance
class CreateBalanceHandler(tornado.web.RequestHandler):
@tornado.gen.coroutine
def post(self):
gross_balance = self.get_argument('gross_balance')
Balance.createBalance(gross_balance)
Balance.sayHi()
self.redirect('/query/{}'.format(gross_balance))
我做错了什么? sayHi函数显示其打印但与createBalance没有任何反应。
答案 0 :(得分:1)
用createBalance
装饰gen.coroutine
以在ioloop上运行它。要等到创建余额,请像yield Balance.createBalance()
RequestHandler
一样调用它
模型
class Balance(Document):
gross_balance = FloatField(required=True, min_value=0, default=0)
# classmethod must be the most outter decorator (as well as staticmethod)
@classmethod
@tornado.gen.coroutine
def createBalance(cls, gross_balance):
result = yield Balance.objects.create(gross_balance = gross_balance)
# AFAIR save returns future and also should be yielded
# yield. result.save()
result.save()
@classmethod
def sayHi(cls):
print "Hi there"
主
from models import Balance
class CreateBalanceHandler(tornado.web.RequestHandler):
@tornado.gen.coroutine
def post(self):
gross_balance = self.get_argument('gross_balance')
yield Balance.createBalance(gross_balance)
Balance.sayHi()
self.redirect('/query/{}'.format(gross_balance))
注意:正如我在代码段注释中提到的那样,在motorengine中,Document.save
会返回Future
,并且您可能也想要yield
,等待它完成。