How to record time in Postgresql via sqlalchemy - postgresql

Question

I absolutely do not understand how to write the net time to the database.
I create a table via sqlalchemy using the time object. Am I doing everything right?
windows = Table(
"windows", meta,
Column("courier_id", Integer, ForeignKey("couriers.courier_id"), nullable=False),
Column("start_time", Time),
Column("end_time", Time)
)
And how do I upload the data now? I did it like this
query = datab.windows.insert().values([1, 09:00, 18:00])
await conn.execute(query)
Аnd there is one more question. How to specify which columns to fill in in insert()

Answer 1

Use a datetime.time() object to specify the time values and pass the .values() as a dict with the column names as the keys:
import datetime
from sqlalchemy import (
create_engine,
Table,
Column,
Integer,
Time,
ForeignKey,
MetaData,
)
engine = create_engine("sqlite:///:memory:", echo=True)
windows = Table(
"windows",
MetaData(),
Column(
"courier_id",
Integer,
# ForeignKey("couriers.courier_id"), # omit for this example
nullable=False,
),
Column("start_time", Time),
Column("end_time", Time),
)
windows.create(engine)
stmt = windows.insert().values(
{
"courier_id": 1,
"start_time": datetime.time(9),
"end_time": datetime.time(18),
}
)
with engine.begin() as conn:
conn.execute(stmt)
"""SQL generated:
2021-03-24 16:57:50,811 INFO sqlalchemy.engine.Engine BEGIN (implicit)
2021-03-24 16:57:50,813 INFO sqlalchemy.engine.Engine INSERT INTO windows (courier_id, start_time, end_time) VALUES (?, ?, ?)
2021-03-24 16:57:50,813 INFO sqlalchemy.engine.Engine [generated in 0.00036s] (1, '09:00:00.000000', '18:00:00.000000')
2021-03-24 16:57:50,813 INFO sqlalchemy.engine.Engine COMMIT
"""