calling LENGTH() in SQLite?

[James Hartley]

Perhaps I have been up too many hours, but my syntax foo is fizzling.  Given the following class, I want to compute the string length of "position" instead of storing it as another attribute which can get out of sync.  eg.

class Position(Base):
    __tablename__ = 'position'
    id = Column(INTEGER, primary_key=True)
    timestamp = Column(TIMESTAMP, nullable=False)
    position = Column(TEXT, unique=True, nullable=False)

So to get all positions of string length 2, the following is not working:
from sqlalchemy.sql.expression import func
# ...
for position, in session.query(Position.position).filter(func.length(Position.position == 2):
            print(position)

Any insight offered would certainly be appreciated.

Thanks!

[Simon King]

Your example is missing a bracket. I think I would expect this to work:

for position, in
session.query(Position.position).filter(func.length(Position.position)
== 2):
print(position)

If it still doesn't work, can you show the query that it's generating?

Simon

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