Question

这是我的班级模特：

class Request(models.Model):
    client = models.ForeignKey(Client, related_name='requests')
    driver = models.ForeignKey(Driver, related_name='requests', null=True, blank=True)

    fare = models.OneToOneField(Fare, null=True, blank=True)

    REQUEST_STATE_CHOICES = ((0, 'NEW'), (1, 'PROCESSING'), (2, 'SUCCEED'), (3, 'FAILED'))
    state = models.IntegerField(choices=REQUEST_STATE_CHOICES, default=0)
    express = models.BooleanField(default=True)

    created = models.DateTimeField(default=datetime.datetime.today())
    modified = models.DateTimeField(default=datetime.datetime.today())

    request_date = models.DateTimeField(default=None, null=True, blank=True)

    origin_lat = models.FloatField(null=True, blank=True)
    origin_lon = models.FloatField(null=True, blank=True)
    origin_address = models.CharField(max_length=200, null=True, blank=True)
    destination_address = models.CharField(max_length=200, null=True, blank=True)

    NB_DRIVERS_AROUND = 10

    @staticmethod
    def createRequest(client, originLat, originLon, originAddress, destinationAddress, requestDate=None, driver=None):
        """
        Create request
        :param client: the client
        :param originLat: origin latitude
        :param originLon: origin longitude
        :param originAddress: origin address
        :param destinationAddress: destination address
        :param driver: driver, default=None
        """
        request = Request()
        request.client = client
        request.origin_lat = originLat
        request.origin_lon = originLon
        request.origin_address = originAddress
        request.destination_address = destinationAddress
        request.driver = driver
        if driver is not None:
            request.express = False

        if requestDate is None:
            request.request_date = datetime.datetime.now()
        else:
            request.request_date = requestDate

        request.save()

当我从视图中调用Request.createRequest（...）时，会在数据库中创建两个对象（我检查了我的管理员和我的数据库）。当我通过manage.py shell调用它时，只按预期创建一个Request对象。我正在使用Django 1.6和postgresql

以下是views致电：

def test(request):
    client = Client.objects.get(username='brams')

    Request.createRequest(client, 36.822718, 10.15789, 'Rue 6449, el omrane', 'le kram',   requestDate=None,driver=None)

    return render(request, 'test.html', {})

以下是manage.py shell致电：

>>> from etaxi_prod.models import Request, Client
>>> Request.objects.all()
[]
>>> client = Client.objects.get(username='brams')
>>> request = Request.createRequest(client, 36.822718, 10.15789, 'Rue 6449, el omrane',     'le kram', requestDate=None, driver=None)
>>> request
<Request: Request object>
>>> Request.objects.all()
[<Request: Request object>]
>>>

你知道为什么吗？（我已经花了几个小时查看Django文档和问题但没有发现任何内容）

Answer 1

是否有可能存在一些“创建”相关的事件，这些事件也会调用你的createRequest？

您可以使用django调试工具栏查看所有事件，它也有助于检查您的变量（例如，您可以在视图中设置日志消息并检查它是否被调用两次）。

在save（）数据库中创建两次的对象

1 个答案: