I have developed a TG1.1/Elixir/SQLAlchemy application on windows and
tried to port it to Linux.
Although cx_Oracle and SQLAlchemy seem to work when tested in
isolation, my Turbogears app chokes with:
"InvalidRequestError: Could not locate any Engine or Connection bound
to mapper..."
when trying to perform a query.
The versions of the various components (e.g. SQLAlchemy: win: '0.4.5',
linux: '0.4.0' & Elixir: win: '0.5.2' linux: '0.6.1') are slightly
different, although the version of Turbogears (1.1b1) I have kept the
same.
Has anyone any ideas what could be behind this? (Error trace below)
Thanks for your thoughts,
Tim
Page handler: <bound method Root.productSupplierGridData of
<flow.controllers.Root object at 0x94e4b0c>>
Traceback (most recent call last):
File "/usr/lib/python2.5/site-packages/CherryPy-2.2.1-py2.5.egg/
cherrypy/_cphttptools.py", line 105, in _run
self.main()
File "/usr/lib/python2.5/site-packages/CherryPy-2.2.1-py2.5.egg/
cherrypy/_cphttptools.py", line 254, in main
body = page_handler(*virtual_path, **self.params)
File "<string>", line 3, in productSupplierGridData
File "/usr/lib/python2.5/site-packages/TurboGears-1.1b1dev_r3555-
py2.5.egg/turbogears/controllers.py", line 345, in expose
*args, **kw)
File "<string>", line 5, in run_with_transaction
File "/usr/lib/python2.5/site-packages/TurboGears-1.1b1dev_r3555-
py2.5.egg/turbogears/database.py", line 399, in sa_rwt
retval = func(*args, **kw)
File "<string>", line 5, in _expose
File "/usr/lib/python2.5/site-packages/TurboGears-1.1b1dev_r3555-
py2.5.egg/turbogears/controllers.py", line 360, in <lambda>
mapping, fragment, args, kw)))
File "/usr/lib/python2.5/site-packages/TurboGears-1.1b1dev_r3555-
py2.5.egg/turbogears/controllers.py", line 387, in _execute_func
output = errorhandling.try_call(func, *args, **kw)
File "/usr/lib/python2.5/site-packages/TurboGears-1.1b1dev_r3555-
py2.5.egg/turbogears/errorhandling.py", line 72, in try_call
return func(self, *args, **kw)
File "/usr/local/flow/trunk/flow/controllers.py", line 315, in
productSupplierGridData
orderByString=orderByString)
File "/usr/local/flow/trunk/flow/controllers.py", line 167, in
getFilterRecordsAndTotal
totalRecs = theClass.query().filter(filterString).count()
File "/usr/lib/python2.5/site-packages/SQLAlchemy-0.4.0-py2.5.egg/
sqlalchemy/orm/query.py", line 758, in count
return q._count()
File "/usr/lib/python2.5/site-packages/SQLAlchemy-0.4.0-py2.5.egg/
sqlalchemy/orm/query.py", line 785, in _count
return self.session.scalar(s, params=self._params,
mapper=self.mapper)
File "/usr/lib/python2.5/site-packages/SQLAlchemy-0.4.0-py2.5.egg/
sqlalchemy/orm/session.py", line 532, in scalar
engine = self.get_bind(mapper, clause=clause)
File "/usr/lib/python2.5/site-packages/SQLAlchemy-0.4.0-py2.5.egg/
sqlalchemy/orm/session.py", line 641, in get_bind
raise exceptions.InvalidRequestError("Could not locate any Engine
or Connection bound to mapper '%s'" % str(mapper))
InvalidRequestError: Could not locate any Engine or Connection bound
to mapper 'Mapper|prodsupp|prodsupp'
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