Hi,
How should one create SQLite temporary tables using SQLAlchemy? The following
does not work:
from sqlalchemy import create_engine, Column, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from sqlalchemy.schema import CreateTable
Base = declarative_base()
class TempTest(Base):
__tablename__ = 'temp_test'
__table_args__ = {'schema': 'temp'}
name = Column(String, primary_key=True)
engine = create_engine('sqlite:////tmp/testdb', echo=True)
Session = sessionmaker(bind=engine)
session = Session()
TempTest.__table__.create(session.bind.execution_options(autocommit=False))
session.add(TempTest(name='foo'))
session.flush() # Fails
Although I see the "CREATE TABLE" being emitted, INSERT fails saying the table
does not exist. If instead of calling TempTest.__table__.create() I use the
underlying DBAPI connection, then I can make it work, but it's ugly:
dbapi_con = session.connection().connection.connection
dbapi_con.execute(str(CreateTable(TempTest.__table__,
bind=session.bind)))
session.add(TempTest(name='foo'))
session.flush() # Succeeds
Is there a nicer way to do this?
Thanks,
Gabor
Gabor Gombas
Morgan Stanley | Enterprise Infrastructure
Lechner Odon fasor 8 | Floor 07
Budapest, 1095
Phone: +36 1 881-4376
gabor.gom...@morganstanley.com
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