Question

我正在用Django 1.5.1构建一个项目并决定将项目迁移到Django 1.8.4，然后我发现我无法初始化项目，我能够检测并修复一些错误，但它是一个现在几天，我无法弄清楚剩下的。

Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 312, in execute
    django.setup()
  File "/usr/local/lib/python2.7/dist-packages/django/__init__.py", line 18, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/usr/local/lib/python2.7/dist-packages/django/apps/registry.py", line 85, in populate
    app_config = AppConfig.create(entry)
  File "/usr/local/lib/python2.7/dist-packages/django/apps/config.py", line 86, in create
    module = import_module(entry)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/home/jaime/djcode/spid/preventivos/__init__.py", line 38, in <module>
    from preventivos.views import *
  File "/home/jaime/djcode/spid/preventivos/views.py", line 4, in <module>
    from preventivos.forms import *
  File "/home/jaime/djcode/spid/preventivos/forms.py", line 122, in <module>
    class UnidadesForm(forms.ModelForm):
  File "/home/jaime/djcode/spid/preventivos/forms.py", line 124, in UnidadesForm
    ciudad = forms.ModelChoiceField(widget=forms.Select(attrs={'size':'13', 'onchange':'this.form.action=this.form.submit()'}), choices= RefCiudades.objects.filter(provincia__contains = RefProvincia.objects.filter(descripcion__contains = "CHUBUT").values("id"))  )
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py", line 127, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 679, in filter
    return self._filter_or_exclude(False, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 697, in _filter_or_exclude
    clone.query.add_q(Q(*args, **kwargs))
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/query.py", line 1309, in add_q
    clause, require_inner = self._add_q(where_part, self.used_aliases)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/query.py", line 1337, in _add_q
    allow_joins=allow_joins, split_subq=split_subq,
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/query.py", line 1149, in build_filter
    lookups, parts, reffed_expression = self.solve_lookup_type(arg)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/query.py", line 1035, in solve_lookup_type
    _, field, _, lookup_parts = self.names_to_path(lookup_splitted, self.get_meta())
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/query.py", line 1372, in names_to_path
    if field.is_relation and not field.related_model:
  File "/usr/local/lib/python2.7/dist-packages/django/utils/functional.py", line 60, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/related.py", line 110, in related_model
    apps.check_models_ready()
  File "/usr/local/lib/python2.7/dist-packages/django/apps/registry.py", line 131, in check_models_ready
    raise AppRegistryNotReady("Models aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet.

Answer 1

回溯告诉您问题是UnidadesForm模型表单中的这一行。

ciudad = forms.ModelChoiceField(widget=forms.Select(attrs={'size':'13', 'onchange':'this.form.action=this.form.submit()'}), choices= RefCiudades.objects.filter(provincia__contains = RefProvincia.objects.filter(descripcion__contains = "CHUBUT").values("id"))  )

由于它是模型选择字段，最好使用queryset参数而不是choices。

ciudad = forms.ModelChoiceField(widget=forms.Select(attrs={'size':'13', 'onchange':'this.form.action=this.form.submit()'}), queryset= RefCiudades.objects.filter(provincia__contains = RefProvincia.objects.filter(descripcion__contains = "CHUBUT").values("id"))  )

我认为这可能会阻止错误，但我不确定您的查询集是否有意义。过滤器参数provincia__contains应采用字符串，但RefProvincia(...).values("id")将返回值查询集。

将项目从django 1.5迁移到django 1.8的问题

1 个答案: