在我的应用程序中,我有一个contact_types 表,它被细分为供应商/客户联系类型。联系人类型有点像他们的头衔,但并非总是如此。无论如何,以下每个类都在三个不同的文件中。父级和两个子级的 globals.py 文件位于 customer.py 和 vendor.py 文件中。我还使用我在这里找到的函数来打印带有值的实际 db 查询,以便我可以手动运行 sql。
class ContactType(DeclarativeBase,TimeUserMixin):
__tablename__ = 'contact_types'
id = Column(Integer,primary_key=True,autoincrement=True)
_code = Column('code',Unicode(50),nullable=False)
sort_order = Column(Integer,nullable=False,default=9999)
type = Column(Unicode(1),nullable=False)
__mapper_args__ = {'polymorphic_on':type}
@hybrid_property
def code(self):
return self._code
@code.setter
def code(self,code):
self._code = code.upper()
def __init__(self,code,sort_order=None):
self.code=code
if sort_order is not None:
self.sort_order = sort_order
@property
def as_dict(self):
return {
'id':self.id,
'code':self.code
}
@classmethod
def all_as_dict(cls, ):
return [c.as_dict for c in DBSession.query(cls).order_by(cls.code)]
@classmethod
def by_id(cls,id):
return DBSession.query(cls).get(id)
@classmethod
def by_code(cls,code ):
return DBSession.query(cls).filter(cls.code == code.upper()).first()
class VendorContactType(m_globals.ContactType):
__mapper_args__ = {'polymorphic_identity':'v'}
class CustomerContactType(g.ContactType):
__mapper_args__ = {'polymorphic_identity':'c'}
Table detail ...
create_time | timestamp without time zone | not null
modify_time | timestamp without time zone | not null
id | integer | not null default nextval('contact_types_id_seq'::regclass)
code | character varying(50) | not null
sort_order | integer | not null
type | character varying(1) | not null
create_user_id | integer | not null
modify_user_id | integer | not null
Indexes:
"contact_types_pkey" PRIMARY KEY, btree (id)
"ix_contact_types_create_user_id" btree (create_user_id)
"ix_contact_types_modify_user_id" btree (modify_user_id)
Foreign-key constraints:
"contact_types_create_user_id_fkey" FOREIGN KEY (create_user_id) REFERENCES tg_user(user_id)
"contact_types_modify_user_id_fkey" FOREIGN KEY (modify_user_id) REFERENCES tg_user(user_id)
Referenced by:
TABLE "contacts" CONSTRAINT "contacts_contact_type_id_fkey" FOREIGN KEY (contact_type_id) REFERENCES contact_types(id)
select id,code,type from contact_types where code='NEW';
id | code | type
------+------+------
7242 | NEW | c
7251 | NEW | v
现在的问题是无论我做什么应用程序说它找不到记录,当我将 sqlalchemy 使用的 sql 复制并粘贴到 postgres 中时,我得到了一个结果。太让人抓狂了!!!!我猜继承发生了一些奇怪的事情,但我找不到它。
这是我得到的控制台输出......
08:34:17,419 DEBUG [erp.model.m_ap] 0 <----- This is just a simple queryresult.count()
08:34:17,421 DEBUG [erp.model.m_ap] SELECT contact_types.code, contact_types.create_time, contact_types.modify_time, contact_types.id, contact_types.sort_order, contact_types.type, contact_types.create_user_id, contact_types.modify_user_id
FROM contact_types
WHERE contact_types.code = 'NEW' AND contact_types.type IN ('v') <--- output of printquery
所以没有找到结果。现在我将上面输出的查询直接粘贴到 psql ...
erp_beta=# SELECT contact_types.code, contact_types.create_time, contact_types.modify_time, contact_types.id, contact_types.sort_order, contact_types.type, contact_types.create_user_id, contact_types.modify_user_id
erp_beta-# FROM contact_types
erp_beta-# WHERE contact_types.code = 'NEW' AND contact_types.type IN ('v')
erp_beta-# ;
code | create_time | modify_time | id | sort_order | type | create_user_id | modify_user_id
------+----------------------------+---------------------------+------+------------+------+----------------+----------------
NEW | 2013-04-10 08:16:02.778212 | 2013-04-10 08:16:02.77822 | 7251 | 9 | v | 46 | 46
(1 row)
是什么赋予了?