Question

由于原因不明，我的Django模型中只有一个（18个）抛出错误“类型对象'LidarReading'没有属性'get_or_create'”。型号声明如下。

class LidarReading(models.Model):
    value = models.DecimalField(max_digits=10, decimal_places=2)
    roll = models.DecimalField(max_digits=12, decimal_places=4)
    pitch = models.DecimalField(max_digits=12, decimal_places=4)
    yaw = models.DecimalField(max_digits=12, decimal_places=4)
    coordinates = models.ForeignKey('FlightCoordinate', models.SET_NULL, blank=True, null=True)

    created = models.DateTimeField(auto_now_add=True, blank=True, null=True)
    modified = models.DateTimeField(auto_now=True)

Django command中的调用如下（注意'flight_coordinate'是使用上面的get_or_create创建的FlightCoordinate模型对象）：

lidar, created = LidarReading.get_or_create(value=t['lidarreading_value'],
    roll=t['lidarreading_roll'],
    pitch=t['lidarreading_pitch'],
    yaw=t['lidarreading_yaw'],
    coordinates=flight_coordinate,
    created=t['lidarreading_created'])

提前感谢您的帮助。

Answer 1

你忘了objects

lidar, created = LidarReading.objects.get_or_create(value=t['lidarreading_value'],
    roll=t['lidarreading_roll'],
    pitch=t['lidarreading_pitch'],
    yaw=t['lidarreading_yaw'],
    coordinates=flight_coordinate,
    created=t['lidarreading_created'])

类型对象没有属性'get_or_create'

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