我正在使用这个django_multitenant库来实现多租户。我尝试使用下面的代码在python manage.py shell中创建一个对象
>>> from ReportingWebapp.models import *
>>> from django_multitenant.utils import *
>>> org = Organization.objects.first()
>>> set_current_tenant(org)
>>> get_current_tenant()
<Organization: Organization object (1)>
>>> a = ApplicationSetting(username="a",password="b",client_secret="c",client_id="d",tenant_id="e")
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "C:\Users\hp\Desktop\reporting_multitenant\env\lib\site-packages\django_multitenant\mixins.py", line 58, in __init__
super(TenantModelMixin, self).__init__(*args, **kwargs)
File "C:\Users\hp\Desktop\reporting_multitenant\env\lib\site-packages\django\db\models\base.py", line 416, in __init__
self._state = ModelState()
File "C:\Users\hp\Desktop\reporting_multitenant\env\lib\site-packages\django_multitenant\mixins.py", line 62, in __setattr__
if (attrname in (self.tenant_field, get_tenant_field(self).name)
File "C:\Users\hp\Desktop\reporting_multitenant\env\lib\site-packages\django_multitenant\mixins.py", line 115, in tenant_field
return self.tenant_id
File "C:\Users\hp\Desktop\reporting_multitenant\env\lib\site-packages\django\db\models\query_utils.py", line 149, in __get__
instance.refresh_from_db(fields=[field_name])
File "C:\Users\hp\Desktop\reporting_multitenant\env\lib\site-packages\django\db\models\base.py", line 623, in refresh_from_db
db_instance_qs = self.__class__._base_manager.db_manager(using, hints=hints).filter(pk=self.pk)
File "C:\Users\hp\Desktop\reporting_multitenant\env\lib\site-packages\django\db\models\base.py", line 573, in _get_pk_val
return getattr(self, meta.pk.attname)
File "C:\Users\hp\Desktop\reporting_multitenant\env\lib\site-packages\django\db\models\query_utils.py", line 147, in __get__
val = self._check_parent_chain(instance)
File "C:\Users\hp\Desktop\reporting_multitenant\env\lib\site-packages\django\db\models\query_utils.py", line 163, in _check_parent_chain
return getattr(instance, link_field.attname)
AttributeError: 'NoneType' object has no attribute 'attname'
为什么我会犯这个错误?租户已在本地线程中设置
models.py
class Organization(TenantModel):
tenant_id = 'id'
org_name = models.CharField('Organization Name',max_length=200)
num_agents = models.PositiveIntegerField(
'Number of agents',
help_text = 'Approximate number of agents who possess microsoft teams license'
)
admin_name = models.CharField(max_length=50)
admin_email = models.EmailField()
class ApplicationSetting(TenantModel):
org = models.ForeignKey(Organization,on_delete=models.CASCADE)
tenant_id='organization_id'
username = models.CharField(max_length=100)
password = models.CharField(max_length=100)
client_id = models.CharField(max_length=255)
client_secret = models.CharField(max_length=255)
tenant_id = models.CharField(max_length=255, null=True)
user_token = models.TextField(null=True)
app_token = models.TextField(null=True)
我怀疑问题是由于
tenant_id
模型字段在ApplicationSetting
模型。在内部,您正在使用的包似乎使用tenant_id
作为对租户相关外键的字段名的引用由于您将
tenant_id
声明为可为空的字段,因此原始tenant_id='organization_id'
不再存在。初始化ApplicationSetting
时,TenantManager
会查找名为None
的字段,并尝试查找它的相关名称(通过attname
属性),因此出现错误要解决此问题,请删除
tenant_id
字段之后,您可能会得到不同的异常,因为
ApplicationSetting
模型不包含名为organization
的字段。要解决此问题,您需要重命名org
字段:或者,您可以将
tenant_id
改为org_id
免责声明:我对您使用的软件包一点也不熟悉
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