def fill_currencies(engine: Engine):
""" Fill currencies table with CurrencyEnum values """
conn = engine.connect()
trans = conn.begin()
for c in CurrencyEnum:
query = sa.select((1, )).where(Currency.c.name == c.value)
already_exists = conn.execute(query).scalar()
if not already_exists:
query = Currency.insert().values(name=c.value)
conn.execute(query)
trans.commit()
