[Sqlalchemy-tickets] Issue #3658: orm load when col is missing fails to report correct exception (zzzeek/sqlalchemy)

[Mike B. <iss...@bi...>]

New issue 3658: orm load when col is missing fails to report correct exception
https://bitbucket.org/zzzeek/sqlalchemy/issues/3658/orm-load-when-col-is-missing-fails-to

Mike Bayer:

1.0 regression, works in 0.9:


```
#!python

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

Base = declarative_base()


class A(Base):
    __tablename__ = 'a'
    id = Column(Integer, primary_key=True)
    x = Column(Integer)

e = create_engine("sqlite://", echo=True)
Base.metadata.create_all(e)

s = Session(e)
s.query(A.id, A.x).from_statement("select 1").all()
```

in 0.9:

    sqlalchemy.exc.NoSuchColumnError: "Could not locate column in row for column 'a.id'"

in 1.0:

     File "/home/classic/dev/sqlalchemy/lib/sqlalchemy/orm/loading.py", line 74, in instances
     for row in fetch]
    TypeError: 'NoneType' object is not callable