I got this error after updating sqlalchemy today:
File "/Users/dmiller/Code/PyOE/src/orderentry/model.py", line 394,
in ?
assign_mapper(Value, value, properties=dict(alias=sa.relation
(Alias)))
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/mapping/
__init__.py", line 114, in assign_mapper
m = mapper(class_, *args, **params)
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/mapping/
__init__.py", line 49, in mapper
return Mapper(class_, table, *args, **params)
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/mapping/
mapper.py", line 175, in __init__
prop.init(key, self)
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/mapping/
mapper.py", line 770, in init
self.do_init(key, parent)
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/mapping/
properties.py", line 175, in do_init
self.primaryjoin = sql.join(parent.table, self.target).onclause
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/sql.py", line
41, in join
return Join(left, right, onclause, **kwargs)
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/sql.py", line
834, in __init__
self.onclause = self._match_primaries(left, right)
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/sql.py", line
851, in _match_primaries
if fk.references(primary):
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/schema.py",
line 369, in references
return table._get_col_by_original(self.column) is not None
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/sql.py", line
570, in _get_col_by_original
return self.original_columns.get(column.original, None)
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/sql.py", line
1070, in _orig_columns
return self._orig_cols
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/ext/proxy.py",
line 122, in __getattr__
return getattr(self._get_impl(), key)
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/ext/proxy.py",
line 114, in _get_impl
e = self.engine
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/ext/proxy.py",
line 122, in __getattr__
return getattr(self._get_impl(), key)
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/ext/proxy.py",
line 114, in _get_impl
e = self.engine
... many more recursions ...
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/ext/proxy.py",
line 122, in __getattr__
return getattr(self._get_impl(), key)
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/ext/proxy.py",
line 114, in _get_impl
e = self.engine
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/ext/proxy.py",
line 124, in <lambda>
engine = property(lambda self: self._engine.engine)
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/ext/proxy.py",
line 82, in __getattr__
if self.get_engine() is not None:
File "/Users/dmiller/Code/SQLAlchemy/lib/sqlalchemy/ext/proxy.py",
line 43, in get_engine
if self.storage.engine is None:
RuntimeError: maximum recursion depth exceeded
This fixed it, although not elegantly (too many lookups going on,
which is expensive in Python):
class ProxyTableImpl(sql.TableImpl):
... other methods omitted ...
def __getattr__(self, key):
d = object.getattr(self, "__dict__")
if key in d:
return d[key]
return getattr(self._get_impl(), key)
~ Daniel
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