python - 如何使用 sqlalchemy 从 ubuntu 连接远程 Windows MSSQL 服务器

Question

我正在尝试使用 sqlalchemy 从 ubuntu 远程连接 Windows 中的 MSSQL。我创建了如下所示的 DSN

数据库信息.py:

 username = 'XXX'
 pw = 'XXX'
 host = '190.122.12.214'
 drivername = 'SQL Server'
 database = 'XXX'
 extra_param='' 

我将 dbinfo.py 文件导入 db_handler.py :

import transaction
from z3c.saconfig import Session as SASession
from z3c.saconfig import EngineFactory
from zope import component
from zope.sqlalchemy import mark_changed
# sqlalchemy
import sqlalchemy as sa
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from redindia.loginpage import dbinfo
info = {
'username' : dbinfo.username,
'pw' : dbinfo.pw,
'host' : dbinfo.host,
'drivername' : dbinfo.drivername,
'database' : dbinfo.database,
'extra_param' : ''
  }
drivername = str(info['drivername'])
username = str(info['username'])
host = str(info['host'])
database = str(info['database'])
extra_param = str(info['extra_param'])
def getDb():

  pass

def getSession(testing=False):
 try:
    return SASession()
 except component.ComponentLookupError:
    pass
# construct url to open database
  _testing_ = ''
  if testing:
     _testing_ = '_testing'
  if info['pw'] != '':
    DSN = drivername+'://'+username+':' + info['pw'] +'@'+host+'/'+database+_testing_+'?charset=utf8'+extra_param

  else:
     DSN = drivername+'://'+username+'@'+host+'/'+database+_testing_+'?charset=utf8'+extra_param

   engine_factory = EngineFactory(DSN, pool_recycle=7200)
  engine = engine_factory()

  ## create a global session
  from z3c.saconfig import GloballyScopedSession
  utility = GloballyScopedSession(bind=engine) # i think, without engine, it will find above provided one...
  from z3c.saconfig.interfaces import IScopedSession
  component.provideUtility(utility, provides=IScopedSession)
  return SASession()

session = getSession()
engine = session.get_bind()

Base = declarative_base(engine)

Base.metadata.reflect()
tables = Base.metadata.tables

然后连接下面提到的细节

def callStoreProcedure(self):
     form = self.request.form
     area = form.get('Area') 
     session = getSession()
     result = session.execute("select * from BBBB")
     result_set = result.fetchall()
     return result_set

我配置 ODBC 连接设置

等/odbc.ini:

  [SQL Server]
     Description=my dsn
     Driver=SQL Server
     Database=XXX
     Servername=190.122.12.214
     UID=XXX
     PWD=XXX

等/odbcinst.ini:

   [SQL Server]
      Description = sql Driver
      Driver = /usr/local/lib/libtdsodbc.so
      Setup=/usr/local/lib/libtdsS.so
      UsageCount = 1      

我配置了上面的设置。但我无法连接 MSSQL。我收到如下错误

"ArgumentError: Could not parse rfc1738 URL from string 'SQL Server://XXX:XXX@190.122.12.214/XXX?charset=utf8'" 

请任何人都可以帮我解决这个问题。在此先感谢。

Answer 1

SQLAlchemy 引擎 URL 应该以 mssql 开头。或 mssql+pyodbc .见Engine Configuration documentation .