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我有代表系统中设置的模型，我从应用程序的另一部分使用它，因此导入有 3 个级别WORKING CODE <- Module <- Model

模型Variables



from django.db import models

class Variables(models.Model):
    key = models.CharField(max_length = 20, verbose_name = 'Variable')
    value = models.CharField(max_length = 1024)

    class Meta:
        app_label = 'core'

    def __unicode__(self):
        return '%s: %s' % (self.key, self.value,)

这是我使用它的代码

模块variables.py



from core.models.storage import Variables

def get_var(name):
  return Variables.objects.get(key = name)

模块config.py



  var = get_var('some_key')

当我从 django shell 中使用这些东西时，一切正常，但是当我调用get_var函数时，我有ImportError异常

storage.py



from django.db import models

class Variables(models.Model):
    key = models.CharField(max_length = 20, verbose_name = 'Variable')
    value = models.CharField(max_length = 1024)

    class Meta:
        app_label = 'core'

    def __unicode__(self):
        return '%s: %s' % (self.key, self.value,)




  File "monitor_cli.py", line 19, in 
    print worker.get_provider()
  File "/home/sultan/Project/monitor/app/worker.py", line 14, in get_provider
    print Variables.objects.get(pk=1)
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/manager.py", line 132, in get
    return self.get_query_set().get(*args, **kwargs)
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/query.py", line 341, in get
    clone = self.filter(*args, **kwargs)
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/query.py", line 550, in filter
    return self._filter_or_exclude(False, *args, **kwargs)
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/query.py", line 568, in _filter_or_exclude
    clone.query.add_q(Q(*args, **kwargs))
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/sql/query.py", line 1172, in add_q
    can_reuse=used_aliases, force_having=force_having)
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/sql/query.py", line 1060, in add_filter
    negate=negate, process_extras=process_extras)
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/sql/query.py", line 1226, in setup_joins
    field, model, direct, m2m = opts.get_field_by_name(name)
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/options.py", line 307, in get_field_by_name
    cache = self.init_name_map()
  File "/usr/local/lib/python2.6/dist-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 "/usr/local/lib/python2.6/dist-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 "/usr/local/lib/python2.6/dist-packages/django/db/models/options.py", line 428, in _fill_related_many_to_many_cache
    for klass in get_models():
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/loading.py", line 167, in get_models
    self._populate()
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/loading.py", line 61, in _populate
    self.load_app(app_name, True)
  File "/usr/local/lib/python2.6/dist-packages/django/db/models/loading.py", line 76, in load_app
    app_module = import_module(app_name)
  File "/usr/local/lib/python2.6/dist-packages/django/utils/importlib.py", line 35, in import_module
    __import__(name)
ImportError: No module named c
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1 回答 1

0

摆脱模型目录，并将所有模型放在 models.py 文件中，除非你有很好的理由不这样做。将您的导入更改为from core.models import Variable（将您的Variables类重命名为Variable- django 模型应命名为单数而不是复数）。

问题可能与您的模型位于models;以外的命名空间有关。IE。models.storage. django 基础设施期望某些东西在某些地方。如果您打算将模型放在单独的命名空间中，就像您正在做的那样，您应该从模块__init__.py内的文件中导入它们。models不要再这样做了，除非你有充分的理由。

最后，在提出这种性质的问题时，您应该提供更多信息。您应该显示所有相关文件的代码。您应该提供有关您所做的偏离 django 约定的详细信息（在这种情况下，是一个模型目录而不是一个 models.py 文件）。您还应该显示来自 的相关设置settings.py，在这种情况下，是您的INSTALLED_APPS设置。您还应该告诉我们您使用的是什么版本的 django 和 python；这有时是相关的。预先提供更多信息比减少信息要好得多。

于 2011-05-29T22:13:03.770 回答