I have a sqlalchemy table defined like follows
class Album(DeclarativeBase):
# Name of mapped db table
__tablename__ = 'material'
id = Column(Integer, primary_key=True)
name = Column(Unicode(50), nullable=False, unique=True)
@synonym_for("_voltage")
@memoized_property
def total_sales(self):
do some calculation here
return result
For some reasons(showing it in sqlajqgrid of tw2) I am using synonym_for.
Now when I try to use the sorting/comparisons which inturn calls for same
functions of sqlalchemy. it does not work. It gives a long traceback with
statements like
return getattr(self.comparator, attribute)
File
"/home/jeetu/LEARN/turbogears/tg22_venv/local/lib/python2.7/site-packages/SQLAlchemy-0.7.8-py2.7-linux-x86_64.egg/sqlalchemy/util/langhelpers.py",
line 485, in __get__
obj.__dict__[self.__name__] = result = self.fget(obj)
File
"/home/jeetu/LEARN/turbogears/tg22_venv/local/lib/python2.7/site-packages/SQLAlchemy-0.7.8-py2.7-linux-x86_64.egg/sqlalchemy/orm/attributes.py",
line 203, in comparator
self._comparator = self._comparator()
File
"/home/jeetu/LEARN/turbogears/tg22_venv/local/lib/python2.7/site-packages/SQLAlchemy-0.7.8-py2.7-linux-x86_64.egg/sqlalchemy/orm/descriptor_props.py",
line 67, in <lambda>
lambda: self._comparator_factory(mapper),
File
"/home/jeetu/LEARN/turbogears/tg22_venv/local/lib/python2.7/site-packages/SQLAlchemy-0.7.8-py2.7-linux-x86_64.egg/sqlalchemy/orm/descriptor_props.py",
line 376, in _comparator_factory
prop = self._proxied_property
RuntimeError: maximum recursion depth exceeded while calling a Python object
As to my understanding it is searching for comparator function but not able
to find one. I tried implementing some sort of PropComparator,
ColumnComparator etc, but not able to get it rigth. Can somebody help me to
get the sorting function implemented.
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