您好，
我的django网站上只有多个数据库..每个用户都使用另一个数据库，在UserProfile中设置。
我的问题是：
如何设置modelForm以使用特定数据库？
我收到了这些错误：表XX不存在。因为django试图使用我的auth db ..我尝试使用路由器，但我在互联网上找到的所有样本，都没有使用UserProfile中的数据库名称。
这是我的表格：
class ClienteForm(ModelForm):
class Meta:
model = Pessoa
def __init__(self, *args, **kwargs):
vUserProfile = kwargs.pop('vUserProfile', None)
super(ClienteForm, self).__init__(*args, **kwargs)
这是我的追溯：
Environment:
Request Method: POST
Request URL: http://127.0.0.1:8000/cadastro/pessoa/novo/
Django Version: 1.5.1
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',
'debug_toolbar',
'pagination',
'bootstrap_toolkit',
'web_core')
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',
'debug_toolbar.middleware.DebugToolbarMiddleware',
'pagination.middleware.PaginationMiddleware')
Traceback:
File "/Library/Python/2.7/site-packages/django/core/handlers/base.py" in get_response
115. response = callback(request, *callback_args, **callback_kwargs)
File "/Users/fellipeh/PycharmProjects/webconflex/cadastros/views.py" in EditaPessoa
47. if formPessoa.is_valid():
File "/Library/Python/2.7/site-packages/django/forms/forms.py" in is_valid
126. return self.is_bound and not bool(self.errors)
File "/Library/Python/2.7/site-packages/django/forms/forms.py" in _get_errors
117. self.full_clean()
File "/Library/Python/2.7/site-packages/django/forms/forms.py" in full_clean
274. self._post_clean()
File "/Library/Python/2.7/site-packages/django/forms/models.py" in _post_clean
344. self.validate_unique()
File "/Library/Python/2.7/site-packages/django/forms/models.py" in validate_unique
353. self.instance.validate_unique(exclude=exclude)
File "/Library/Python/2.7/site-packages/django/db/models/base.py" in validate_unique
731. errors = self._perform_unique_checks(unique_checks)
File "/Library/Python/2.7/site-packages/django/db/models/base.py" in _perform_unique_checks
826. if qs.exists():
File "/Library/Python/2.7/site-packages/django/db/models/query.py" in exists
596. return self.query.has_results(using=self.db)
File "/Library/Python/2.7/site-packages/django/db/models/sql/query.py" in has_results
442. return bool(compiler.execute_sql(SINGLE))
File "/Library/Python/2.7/site-packages/django/db/models/sql/compiler.py" in execute_sql
840. cursor.execute(sql, params)
File "/Library/Python/2.7/site-packages/django/db/backends/util.py" in execute
41. return self.cursor.execute(sql, params)
File "/Library/Python/2.7/site-packages/firebird/base.py" in execute
158. six.reraise(utils.DatabaseError, utils.DatabaseError(*self.error_info(e, query, params)), sys.exc_info()[2])
File "/Library/Python/2.7/site-packages/firebird/base.py" in execute
150. return self.cursor.execute(q, params)
File "/Library/Python/2.7/site-packages/fdb/fbcore.py" in execute
3322. PreparedStatement(operation, self, True))
File "/Library/Python/2.7/site-packages/fdb/fbcore.py" in __init__
1934. "Error while preparing SQL statement:")
Exception Type: DatabaseError at /cadastro/pessoa/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')
这是我的Pessoa模型：
class Pessoa(models.Model):
idsys_point_cliente = models.CharField(max_length=28, primary_key=True)
idpessoa = models.IntegerField(verbose_name=u'Código', primary_key=True, default=-1)
data_cadastro = models.DateTimeField(u'Data/Hora Cadastro', default=datetime.now, blank=True, editable=False)
data_atualizacao = models.DateTimeField(verbose_name=u'Data/Hora da Última Atualização', default=datetime.now,
blank=True)
status = models.CharField(verbose_name=u'Status',
max_length=1,
default='A',
choices=Ativo_Inativo_CHOICE)
razao_social = models.CharField(u'Razão Social *', max_length=70, null=False)
nome_fantasia = models.CharField(u'Nome Fantasia', max_length=70, blank=True, null=True)
endereco = models.CharField(u'Endereço *', max_length=150, null=False)
numero = models.CharField(u'Número *', max_length=30, null=False)
bairro = models.CharField(u'Bairro *', max_length=40, null=False)
complemento = models.CharField(u'Complemento', max_length=30, blank=True, null=True)
idcidade = models.ForeignKey('web_core.Cidade', verbose_name="Cidade *",
db_column='idcidade', null=False, blank=False)
email = models.EmailField(u'E-Mail', max_length=100, blank=True, null=True)
fisico_juridico = models.CharField('Tipo Cadastro *',
max_length=1,
default='F',
choices=FIS_JUR_CHOICE)
fis_cpf = models.CharField(u'CPF', max_length=14, null=True, blank=True)
jur_cnpj = models.CharField(u'CNPJ', max_length=18, null=True, blank=True)
telefone1 = models.CharField(u'Telefone', max_length=14)
idrepresentante = models.IntegerField(u'Representante', null=True, blank=True, editable=False)
class Meta:
ordering = ['razao_social']
managed = False
db_table = 'pessoa'
def __unicode__(self):
return self.razao_social
答案 0 :(得分：1)
回复我自己的问题......
实现这一目标的唯一方法是让一个中间件获取数据库名称并与本地人合作，如下所示：
文件：middleware.py
from threading import local
from django.contrib.sessions.models import Session
from django.contrib.auth.models import User
from web_core.models import UserProfile
my_local_global = local()
class CustomerMiddleware(object):
def process_request(self, request):
my_local_global.database_name = get_database_name(request)
def get_database_name(request):
session_key = request.session.session_key
try:
session = Session.objects.get(session_key=session_key)
uid = session.get_decoded().get('_auth_user_id')
user = User.objects.get(pk=uid)
profile = UserProfile.objects.get(pk=uid)
if profile:
return profile.dbname
else:
return None
except:
return None
在此之后，在 settings.py 中添加 middleware.py ：
MIDDLEWARE_CLASSES = (
(..)
'middleware.CustomerMiddleware',
)
完成后再制作一个文件来获取db router：
文件：authrouter：
class PadraoRouter(object):
def db_for_read(self, model, **hints):
from middleware import my_local_global
return my_local_global.database_name
def db_for_write(self, model, **hints):
from middleware import my_local_global
return my_local_global.database_name
def allow_relation(self, obj1, obj2, **hints):
return None
def allow_syncdb(self, db, model):
return True
class AuthRouter(object):
def db_for_read(self, model, **hints):
if model._meta.app_label == 'auth':
return 'auth_db'
if model._meta.app_label == 'sessions':
return 'auth_db'
if model._meta.app_label == 'web_core':
return 'auth_db'
return None
def db_for_write(self, model, **hints):
if model._meta.app_label == 'auth':
return 'auth_db'
if model._meta.app_label == 'sessions':
return 'auth_db'
if model._meta.app_label == 'web_core':
return 'auth_db'
return None
def allow_relation(self, obj1, obj2, **hints):
if obj1._meta.app_label == 'auth' or\
obj2._meta.app_label == 'auth':
return True
if obj1._meta.app_label == 'sessions' or\
obj2._meta.app_label == 'sessions':
return True
if obj1._meta.app_label == 'web_core' or\
obj2._meta.app_label == 'web_core':
return True
return None
def allow_syncdb(self, db, model):
if db == 'auth_db':
return model._meta.app_label == 'auth'
elif model._meta.app_label == 'auth':
return False
return None
注意：我需要在每个def中加上 import ，因为Django 1.5.1有一个bug，如果你把import放到文件的顶部..循环导入..
之后，再次更改 settings.py 以添加路由器：
DATABASE_ROUTERS = ['authrouter.AuthRouter',
'authrouter.PadraoRouter']
<强>记住
我这样做，因为我有一个数据库，只有auth ..每个用户都可以访问不同的数据库，具体取决于dbname字段中的保存。
如果您有其他解决方案，请让我知道！
感谢大家。