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您好，我在我的 django 应用程序中使用多个数据库，但是当我尝试调用 is_valid() 函数或 .save() 时，django 不知道如何使用数据库...我的问题是：我怎么知道django表单使用特定的数据库？

这是我的代码：

形式：

class ClienteForm(ModelForm):
class Meta:
    model = Cliente

def __init__(self, *args, **kwargs):
    vUserProfile = kwargs.pop('vUserProfile', None)
    super(ClienteForm, self).__init__(*args, **kwargs)
    self.fields["idcidade"].queryset = Cidade.objects.using(vUserProfile.dbname).all()

    self.fields["idpessoa"].widget.attrs['class'] = "input-mini"
    self.fields["idpessoa"].widget.attrs['readonly'] = "True"

这是我的视图代码：

def editaCliente(request, pessoa_id=None):
if request.user.is_authenticated():
    profile = request.user.get_profile()
    if pessoa_id:
        cliente = Cliente.objects.using(profile.dbname).get(idpessoa=pessoa_id)
    else:
        cliente = None

    if request.method == 'POST':
        formPessoa = ClienteForm(request.POST, instance=cliente, vUserProfile=profile)
        if formPessoa.is_valid():
            cliente = formPessoa.save(commit=False)
            cliente.idrepresentante = profile.id_comerx3c # passando o id do representante
            cliente.internet = 'S'
            cliente = formPessoa.save()

            if cliente:
                return redirect('listaCliente')
    else:
        formPessoa = ClienteForm(instance=cliente, vUserProfile=profile)

return render_to_response(
    'cliente_novo.html',
    locals(),
    context_instance=RequestContext(request),
)

我尝试使用 .is_valid(using=profile.dbname) 但 django 对我说 using 不是参数..

这是追溯：

    Django Version: 1.4.3
Python Version: 2.7.2
Installed Applications:
('django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.admin',
 'django_evolution',
 'pagination',
 'bootstrap_toolkit',
 'tastypie',
 'comerx')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'pagination.middleware.PaginationMiddleware')


Traceback:
File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "C:\point\comerx\views.py" in editaCliente
  63.             if formPessoa.is_valid():
File "C:\Python27\lib\site-packages\django\forms\forms.py" in is_valid
  124.         return self.is_bound and not bool(self.errors)
File "C:\Python27\lib\site-packages\django\forms\forms.py" in _get_errors
  115.             self.full_clean()
File "C:\Python27\lib\site-packages\django\forms\forms.py" in full_clean
  272.         self._post_clean()
File "C:\Python27\lib\site-packages\django\forms\models.py" in _post_clean
  338.             self.validate_unique()
File "C:\Python27\lib\site-packages\django\forms\models.py" in validate_unique
  347.             self.instance.validate_unique(exclude=exclude)
File "C:\Python27\lib\site-packages\django\db\models\base.py" in validate_unique
  633.         errors = self._perform_unique_checks(unique_checks)
File "C:\Python27\lib\site-packages\django\db\models\base.py" in _perform_unique_checks
  724.             if qs.exists():
File "C:\Python27\lib\site-packages\django\db\models\query.py" in exists
  565.             return self.query.has_results(using=self.db)
File "C:\Python27\lib\site-packages\django\db\models\sql\query.py" in has_results
  441.         return bool(compiler.execute_sql(SINGLE))
File "C:\Python27\lib\site-packages\django\db\models\sql\compiler.py" in execute_sql
  818.         cursor.execute(sql, params)
File "C:\Python27\lib\site-packages\django\db\backends\util.py" in execute
  40.             return self.cursor.execute(sql, params)
File "C:\Python27\lib\site-packages\django_firebird-1.5.0.alpha.1-py2.7.egg\firebird\base.py" in execute
  146.             return self.cursor.execute(q, params)
File "C:\Python27\lib\site-packages\fdb\fbcore.py" in execute
  3040.                                     PreparedStatement(operation, self, True))
File "C:\Python27\lib\site-packages\fdb\fbcore.py" in __init__
  1646.                 "Error while preparing SQL statement:")

Exception Type: DatabaseError at /comerx/cliente/novo/
Exception Value: ('Error while preparing SQL statement:\n- SQLCODE: -204\n- Dynamic SQL Error\n- SQL error code = -204\n- Table unknown\n- PESSOA\n- At line 1, column 41', u'-204 -- SELECT FIRST 1 (1) AS "A" FROM "PESSOA" WHERE "PESSOA"."IDPESSOA" = -1')

谢谢大家

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