Correction to the select function argument in ch04#5
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- As per the SQLAlchemy Core, To SELECT from individual columns using a
Core approach, Column objects are accessed from the Table.c accessor
and can be sent directly.
- A list of columns is not accepted as an argument and throws the
ArgumentError exception:
E sqlalchemy.exc.ArgumentError: Column expression, FROM clause,
or other columns clause element expected, got
[Column('order_id', Integer(), table=<orders>), Column('username',
String(length=15), table=<users>, nullable=False), Column('phone',
String(length=20), table=<users>, nullable=False)].
Did you mean to say select(Column('order_id', Integer(),
table=<orders>), Column('username', String(length=15), table=<users>,
nullable=False), Column('phone', String(length=20), table=<users>,
nullable=False))?
- Instead of sending the list, pack the arguments using *
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E sqlalchemy.exc.ArgumentError: Column expression, FROM clause, or other columns clause element expected, got [Column('order_id', Integer(), table=), Column('username', String(length=15), table=, nullable=False), Column('phone', String(length=20), table=, nullable=False)].
Did you mean to say select(Column('order_id', Integer(), table=), Column('username', String(length=15), table=, nullable=False), Column('phone', String(length=20), table=, nullable=False))?