Here's a rudimentary test which has "Client_ID" and "client_id" at the same time in the query. It renders as:
SELECT a.client_id AS "Client_ID", a.id AS a_id, a.client_id AS a_client_id
FROM a
the SQL being generated on your end is key here.
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)
client_id = Column(Integer)
e = create_engine("postgresql://scott:tiger@localhost/test", echo=True)
c = e.connect()
tr = c.begin()
Base.metadata.create_all(c)
sess = Session(c)
sess.add(A(client_id=5))
sess.commit()
print(sess.query(A.client_id.label("Client_ID"), A).all())
On Oct 10, 2013, at 12:59 PM, Michael Bayer <mike...@zzzcomputing.com> wrote:
>
> On Oct 10, 2013, at 8:34 AM, Ryan Kelly <rpkell...@gmail.com> wrote:
>
>> Hi:
>>
>> One of our applications is generating the following error:
>>
>> NoSuchColumnError: "Could not locate column in row for column
>> 'client.claims.client_id'"
>>
>> Which is rather strange, because that column is aliased with .label() to
>> "AS Client_ID", so of course that row cannot be located.
>
> when the SQL is actually rendered, is the "Client_ID" name rendered with
> quotes? it should be, as that is a case-sensitive name.
>
> 0.8 made a change regarding upper/lower case names which is that we no longer
> call lower() on identifier names when producing lookup dictionaries for
> result rows - see
> http://docs.sqlalchemy.org/en/rel_0_8/changelog/migration_08.html#case-insensitive-result-row-names-will-be-disabled-in-most-cases
>
>
> or the failure here might have something to do with a conflicting "client_id"
> name elsewhere in the query.
>
> you might want to see is sending "case_sensitive=False" to create_engine()
> restores the working behavior you saw in 0.7.
>
> it does sound like something originating within your query and how SQLAlchemy
> handles it, psycopg2 is unlikely to be playing a role here.
>
>
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