Hi there,
I try to create a m:n relation. All tables should be reflected from an existing
db.
For this I have the following construct:
engine = EngineFactory(DSN, echo=False,
convert_unicode=True, encoding="latin1" )()
Base = declarative_base(engine)
Base.metadata.reflect()
tables = Base.metadata.tables
class tblPersonCompanyTable(Base):
implements(interfaces.ItblPersonCompanyTable)
__table__ = tables['tblPersonCompany']
class tblPersonTable(Base):
__table__ = tables['tblPerson']
class tblCompanyTable(Base):
__table__ = tables['tblCompany']
related_persons = orm.relation(tblPersonTable,
secondary=tblPersonCompanyTable, backref="company")
class tblFlagTable(Base):
__table__ = tables['tblFlag']
now when I create a tblFlagTable object (which is the first thing accessing the
db), I get an error:
AttributeError: 'tblPersonCompanyTable' object has no attribute 'foreign_keys'
the MySQL-table assigned to 'tblPersonCompanyTable' does have foreign keys
assigned.
what am I doing wrongly? how can I fix this
thanks
robert
File "/home_2/zope/energiecluster/db/scripts/transfer/transfer.py", line 223,
in ?
main()
File "/home_2/zope/energiecluster/db/scripts/transfer/transfer.py", line 173, in
main
fo = tblFlagTable()
File "/home_2/zope/energiecluster/db/scripts/transfer/<string>", line 4, in
__init__
File
"/usr/local/lib/python2.4/site-packages/SQLAlchemy-0.5.0rc4-py2.4.egg/sqlalchemy/orm/attributes.py",
line 858, in initialize_instance
fn(self, instance, args, kwargs)
File
"/usr/local/lib/python2.4/site-packages/SQLAlchemy-0.5.0rc4-py2.4.egg/sqlalchemy/orm/mapper.py",
line 1726, in _event_on_init
instrumenting_mapper.compile()
File
"/usr/local/lib/python2.4/site-packages/SQLAlchemy-0.5.0rc4-py2.4.egg/sqlalchemy/orm/mapper.py",
line 679, in compile
mapper._post_configure_properties()
File
"/usr/local/lib/python2.4/site-packages/SQLAlchemy-0.5.0rc4-py2.4.egg/sqlalchemy/orm/mapper.py",
line 701, in _post_configure_properties
prop.init(key, self)
File
"/usr/local/lib/python2.4/site-packages/SQLAlchemy-0.5.0rc4-py2.4.egg/sqlalchemy/orm/interfaces.py",
line 404, in init
self.do_init()
File
"/usr/local/lib/python2.4/site-packages/SQLAlchemy-0.5.0rc4-py2.4.egg/sqlalchemy/orm/properties.py",
line 575, in do_init
self._determine_joins()
File
"/usr/local/lib/python2.4/site-packages/SQLAlchemy-0.5.0rc4-py2.4.egg/sqlalchemy/orm/properties.py",
line 649, in _determine_joins
self.secondaryjoin = _search_for_join(self.mapper, self.secondary)
File
"/usr/local/lib/python2.4/site-packages/SQLAlchemy-0.5.0rc4-py2.4.egg/sqlalchemy/orm/properties.py",
line 642, in _search_for_join
return join_condition(mapper.local_table, table)
File
"/usr/local/lib/python2.4/site-packages/SQLAlchemy-0.5.0rc4-py2.4.egg/sqlalchemy/sql/util.py",
line 82, in join_condition
for fk in b.foreign_keys:
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