检索Django对象的列表失败模型。管理

Question

我的中有以下结构场景模型.py：

from django.db import models

class SensorManager(models.Manager):
    def create_sensor(self,numero,pinoFisico):
        sensor = self.create(numero = numero,
                             pinoFisico = pinoFisico,
                             ativo      = False)
        return sensor

class Sensor(models.Model):
    numero = models.IntegerField()
    pinoFisico = models.IntegerField()
    ativo = models.BooleanField()
    dataUltimoReconhecimento = models.DateTimeField()
    situacao = None
    moduloSensor = None

    #Manager
    objects = SensorManager()

    def __init__(self):
        self.moduloSensor = ModuloSensor()

而且，在视图.py文件，我有这个：

^{pr2}$

当我试图使用对象时

print sensores

我得到以下堆栈：

[17/Apr/2017 00:38:09] "GET /speedapp/ HTTP/1.1" 200 3649
Internal Server Error: /speedapp/sensores/
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 149, in get_response
    response = self.process_exception_by_middleware(e, request)
  File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 147, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/pi/Documents/speed_project/speed/speedapp/views.py", line 39, in formSensores
    print sensores
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 234, in __repr__
    data = list(self[:REPR_OUTPUT_SIZE + 1])
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 258, in __iter__
    self._fetch_all()
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 1074, in _fetch_all
    self._result_cache = list(self.iterator())
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 69, in __iter__
    obj = model_cls.from_db(db, init_list, row[model_fields_start:model_fields_end])
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 460, in from_db
    new = cls(*values)
TypeError: __init__() takes exactly 1 argument (6 given)
[17/Apr/2017 00:38:11] "GET /speedapp/sensores/ HTTP/1.1" 500 15557

作为堆栈，在使用类from_db中的__init__()方法中的SensorManager方法来构建Sensor对象，其中需要N参数。。。此问题与我的自定义管理器SensorManager有关？在

备注：

1. 对于通过models.Manager与“all（）”方法一起使用的其他对象，此错误不会发生，只会发生在这个Sensor类中

2. 只有当我尝试使用list对象的“use”实例时才会发生，例如：打印它的值

3. 我在搜索中找到了与this和this相关的问题，但我无法用它们来解决我的问题

Answer 1

这是一个高层次的答案。问题是您重写了模型上的__init__方法。你真的，真的应该尽量避免那样。{其他注意事项：^；请阅读其他选项

以下是摘录：

You may be tempted to customize the model by overriding the __init__ method...Rather than overriding __init__, try using one of these approaches 1. Add a classmethod on the model class 2. Add a method on a custom manager (usually preferred)

如果您确实需要重写__init__，那么不要忘记调用super()传递这些值，让Django先完成它的工作。在