Question

当我尝试在Django中使用“过滤器”方法：

dumpData.objects.filter(bid = True)

我得到以下例外：

ImportError：没有名为Trades的模块

 File "XXX\CacheUtil.py", line 141, in loadItems print DumpData.objects.filter(bid = True)
  File "XXX\site-packages\django\db\models\manager.py", line 141, in filter
    return self.get_query_set().filter(*args, **kwargs)
  File "X:\Python27\lib\site-packages\django\db\models\query.py", line 550, in filter
    return self._filter_or_exclude(False, *args, **kwargs)
  File "X:\Python27\lib\site-packages\django\db\models\query.py", line 568, in _filter_or_exclude
    clone.query.add_q(Q(*args, **kwargs))
  File "X:\Python27\lib\site-packages\django\db\models\sql\query.py", line 1194, in add_q
    can_reuse=used_aliases, force_having=force_having)
  File "X:\Python27\lib\site-packages\django\db\models\sql\query.py", line 1069, in add_filter
    negate=negate, process_extras=process_extras)
  File "X:\Python27\lib\site-packages\django\db\models\sql\query.py", line 1248, in setup_joins
    field, model, direct, m2m = opts.get_field_by_name(name)
  File "X:\Python27\lib\site-packages\django\db\models\options.py", line 307, in get_field_by_name
    cache = self.init_name_map()
  File "X:\Python27\lib\site-packages\django\db\models\options.py", line 337, in init_name_map
    for f, model in self.get_all_related_m2m_objects_with_model():
  File "X:\Python27\lib\site-packages\django\db\models\options.py", line 414, in get_all_related_m2m_objects_with_model
    cache = self._fill_related_many_to_many_cache()
  File "X:\Python27\lib\site-packages\django\db\models\options.py", line 428, in _fill_related_many_to_many_cache
    for klass in get_models():
  File "X:\Python27\lib\site-packages\django\db\models\loading.py", line 167, in get_models
    self._populate()
  File "X:\Python27\lib\site-packages\django\db\models\loading.py", line 61, in _populate
    self.load_app(app_name, True)
  File "X:\Python27\lib\site-packages\django\db\models\loading.py", line 76, in load_app
    app_module = import_module(app_name)
  File "X:\Python27\lib\site-packages\django\utils\importlib.py", line 35, in import_module
    __import__(name)
ImportError: No module named Trades

Trade是我的Django App，位于

下的settings.py中

INSTALLED_APPS = (    
(...),
'Trades')

DumpData定义为：

class DumpData(models.Model):
    orderId = models.BigIntegerField()
    typeId = models.BigIntegerField()
    price = models.DecimalField(decimal_places=2,max_digits=20)
    bid = models.BooleanField()
    issued = models.DateField()
    dateDumped = models.DateTimeField()

如果我只尝试

dumbData.objects.all()

一切正常，所以它可能不是服务器/数据库问题。（我也可以毫无例外地保存日期。）

Answer 1

我没有找到任何关于它的文档，但我建议对应用程序使用小写名称。另外，试试：

dumpData.objects.filter(bid = True).all()

Answer 2

好的，我解决了我的问题。因为它没有起作用的原因是在Project Strukture中，我有：

\src
    \PackageNr1
       Main.py  <-- File where Django was called.
    \PackageNr2  <-- Package for the Django Files
       \trades   <-- Django App
          models.py , 
          views ...usw 
       settings.py  <-- Django Settings File
       manage.py

Witch this Struckture我可以调用“save（）”或“object.all（）”之类的东西，它运行正常。但对于大多数人来说，它没有用。所以我将我的Django包移到了Main Pakcage中，现在它可以工作了。新的Struckture看起来像这样：

 \src
    \PackageNr1
        \trades    <-- The django app
            models.py
            views ....
        Main.py
        settings.py <--Django Files
        manage.py

这对我来说很好。

使用Filter时出现django异常（ImportError：No Module named ..）

2 个答案: