Hi!
On Sun, Mar 25, 2012 at 06:56:32PM -0500, Jeremy Hoyle wrote:
> I have a problem while trying to use the "fromDatabase = True" option in
> sqlmeta. Any time I enable this. it gives me the connection error below. Is
> there another attribute I need to do before doing this? I saw another
> thread with this problem but the solution was enable the connection before
> the class which I have done.
>
> from sqlobject import *
>
> class Companys(SQLObject):
> def __init__(self):
> connection_string = 'mysql://user:[email protected]:3306/pySMS'
> conn = connectionForURI(connection_string,debug = True,autoCommit =
> True)
> trans = conn.transaction()
> sqlhub.processConnection = conn
> Company.createTable(ifNotExists = True, connection=conn)
> Company._connection.debug = True
A number of problems here.
1. The connection is created in Companys.__init__ which is not called,
at least it is not called when SQLObject's metaclass processes
fromDatabase. fromDatabase requires an open connection.
2. A transaction is opened but never used. Transaction (trans, in your
case) has to be used instead of connection (in sqlhub, or in every
SQLObject call that accepts connection).
> class Company(SQLObject):
>
> class sqlmeta:
> fromDatabase = True
> lazyUpdate = True
> cacheValues = True
>
> Company_Name = StringCol(length = 256, default = None)
> Company_Address = StringCol(length = 256, default = None)
> Company_Phone = StringCol(length = 256, default = None)
>
> Traceback (most recent call last):
> File "C:\Pysoft\Software\SMS Development\tests\test0.py", line 5, in
> <module>
> from pySMS import Companys
> File "C:\Pysoft\Software\SMS Development\pySMS\__init__.py", line 1, in
> <module>
> from Company import Companys
> File "C:\Pysoft\Software\SMS Development\pySMS\Company.py", line 138, in
> <module>
> class Company(SQLObject):
> File
> "C:\Python27\lib\site-packages\sqlobject-1.2.1-py2.7.egg\sqlobject\declarative.py",
> line 92, in __new__
> cls.__classinit__(cls, new_attrs)
> File
> "C:\Python27\lib\site-packages\sqlobject-1.2.1-py2.7.egg\sqlobject\main.py",
> line 789, in __classinit__
> sqlmeta.addColumnsFromDatabase()
> File
> "C:\Python27\lib\site-packages\sqlobject-1.2.1-py2.7.egg\sqlobject\main.py",
> line 441, in addColumnsFromDatabase
> conn = connection or soClass._connection
> File
> "C:\Python27\lib\site-packages\sqlobject-1.2.1-py2.7.egg\sqlobject\dbconnection.py",
> line 902, in __get__
> return self.getConnection()
> File
> "C:\Python27\lib\site-packages\sqlobject-1.2.1-py2.7.egg\sqlobject\dbconnection.py",
> line 915, in getConnection
> "No connection has been defined for this thread "
> AttributeError: No connection has been defined for this thread or process
Oleg.
--
Oleg Broytman http://phdru.name/ [email protected]
Programmers don't die, they just GOSUB without RETURN.
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