[Sqlalchemy-tickets] Issue #3308: Cannot use hybrid_property in filter_by (zzzeek/sqlalchemy)

[thiefmaster <iss...@bi...>]

New issue 3308: Cannot use hybrid_property in filter_by
https://bitbucket.org/zzzeek/sqlalchemy/issue/3308/cannot-use-hybrid_property-in-filter_by

thiefmaster:

```python

from sqlalchemy import *
from sqlalchemy.ext.hybrid import hybrid_property
from sqlalchemy.orm import *
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()


class Test(Base):
    __tablename__ = 'test'

    id = Column(Integer, primary_key=True)
    foo = Column(Integer)

    @hybrid_property
    def foo_123(self):
        return self.foo == 123


e = create_engine('postgresql:///test', echo=True)
Base.metadata.create_all(e)

s = Session(e)
s.query(Test).filter_by(foo_123=True).all()
```


The WHERE clause generated from this is `test.foo = 123 = true` which fails. I think it should be `WHERE (test.foo = 123) = true ` instead. Maybe a hybrid property could automatically insert parentheses around the generated criterion? That shouldn't break anything but avoid this bug.