Hello All,
I was curious if anyone else has run into this error:
<error message>
Traceback (most recent call last):
File "util/sa/tests/test_sa_dao.py", line 96, in setUp
self.session.add(tc1)
File
"/home/adorsk/projects/gr/jenv2.7/Lib/site-packages/sqlalchemy/orm/session.py",
line 1251, in add
self._save_or_update_state(state)
File
"/home/adorsk/projects/gr/jenv2.7/Lib/site-packages/sqlalchemy/orm/session.py",
line 1262, in _save_or_update_state
mapper = _state_mapper(state)
AttributeError: 'InstanceState' object has no attribute 'manager.mapper'
</error message>
The context in which this error message is generated is pasted below.
I'm using Jython2.7 on a Postgres, via xzJDBC and the Postgresql JDBC
driver.
If you did encounter this error, did you find a workaround?
-Alex
P.S. SqlAlchemy is absolutely brilliant! Beautiful docs and code,
definitely my new favorite python tool.
<code>
import unittest
from sqlalchemy import Table, Column, ForeignKey, ForeignKeyConstraint,
Integer, String, Float, MetaData, create_engine
from sqlalchemy.orm import relationship, mapper
from geoalchemy import *
from geoalchemy.postgis import PGComparator
from sqlalchemy.orm import sessionmaker
class My_Test(unittest.TestCase):
def testFoo(self):
print "foo"
def setUp(self):
self.engine =
create_engine('postgresql+zxjdbc://MY_DB:MY_USER@localhost/MY_PASS)
self.Session = sessionmaker()
connection = self.engine.connect()
# begin a non-ORM transaction
self.trans = connection.begin()
# bind an individual Session to the connection
self.session = self.Session(bind=connection)
schema = {}
self.schema = schema
schema['classes'] = {}
class TestClass1(object):
id = None
children = []
schema['classes']['TestClass1'] = TestClass1
class TestClass2(object):
id = None
name = ""
schema['classes']['TestClass2'] = TestClass2
schema['primary_class'] = TestClass1
metadata = MetaData()
test1_table = Table('test1', metadata,
Column('id', Integer, primary_key=True)
)
test2_table = Table('test2', metadata,
Column('id', Integer, primary_key=True),
Column('name', String)
)
test1_test2_table = Table('test1_test2', metadata,
Column('test1_id', Integer, primary_key=True),
Column('test2_id', Integer, primary_key=True),
ForeignKeyConstraint(['test1_id'], [test1_table.c.id]),
ForeignKeyConstraint(['test2_id'], [test2_table.c.id])
)
mapper(
TestClass1,
test1_table,
properties = {
'children': relationship(TestClass2,
secondary=test1_test2_table)
}
)
mapper(
TestClass2,
test2_table,
properties = {
}
)
metadata.create_all(self.session.bind)
tc1s = []
tc2s = []
for i in range(5):
tc1 = TestClass1()
tc1s.append(tc1)
self.session.add(tc1)
tc2 = TestClass2()
tc2.name = "tc2_%s" % i
tc2s.append(tc2)
self.session.add(tc2)
self.session.commit()
for i in range(len(tc1s)):
tc1 = tc1s[i]
child_tc2s = [tc2s[i], tc2s[ (i + 1) % len(tc1s)]]
for c in child_tc2s:
tc2 = self.session.query(TestClass2).filter(TestClass2.id
== c.id).one()
tc1.children.append(tc2)
self.session.commit()
if __name__ == '__main__':
unittest.main()
</code>
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