def order_detail_flush_delete(a_row, a_session: session):
order = a_row.OrderHeader
old_order = ObjectView(row2dict(order)) # hmm... key ShippedDate vs. "ShippedDate"
order.AmountTotal -= a_row.Amount
order_update(order, old_order, a_session)
row_prt(order, "order_detail_flush_delete adjusted to: " +
str(order.AmountTotal))
def order_detail_flush_dirty(a_row: models.OrderDetail, a_session: session):
old_row = get_old_row(a_row) # type: models.OrderDetail
if a_row.OrderId == old_row.OrderId:
if a_row.ProductId != old_row.ProductId:
product = a_session.query(models.Product). \
filter(models.Product.Id == a_row.ProductId).one()
a_row.UnitPrice = product.UnitPrice
a_row.Amount = a_row.UnitPrice * a_row.Quantity
if a_row.Amount != old_row.Amount:
order = a_row.OrderHeader
order.AmountTotal += a_row.Amount - old_row.Amount
old_order = ObjectView(row2dict(order))
order_update(order, old_order, a_session)
row_prt(order, "order_detail_flush_dirty adjusted to: " +
str(order.AmountTotal))
else: # moved item to different order
order = a_row.OrderHeader # reduce the old one
order.AmountTotal -= old_row.Amount
old_order = ObjectView(row2dict(order))
order_update(order, old_order, a_session)
row_prt(order, "order_detail_flush_dirty adjusted to: " +
str(order.AmountTotal))
if a_row.ProductId != old_row.ProductId:
product = a_session.query(models.Product). \
filter(models.Product.Id == old_row.ProductId).one()
a_row.UnitPrice = product.UnitPrice
a_row.Amount = a_row.UnitPrice * a_row.Quantity
order = a_session.query(models.Order). \
filter(models.Order.Id == a_row.OrderId).one()
old_order = ObjectView(row2dict(order))
order.AmountTotal += a_row.Amount
order_update(order, old_order, a_session)
row_prt(order, "order_detail_flush_dirty adjusted to: " +
str(order.AmountTotal))
def order_detail_flush_new(a_row: models.OrderDetail, a_session: session):
"""
OrderDetail before_flush, new rows
compute amount, adjust Order.AmountTotal
.. which adjusts Customer.balance)
"""
# no "old" in inserts... old_row = get_old_row(a_row)
row_prt(a_row, "\norder_detail_flush_new") # readable log: curr/old values
# nice try.. product = row.Product
product = a_session.query(models.Product).\
filter(models.Product.Id == a_row.ProductId).one()
a_row.UnitPrice = product.UnitPrice
a_row.Amount = a_row.Quantity * a_row.UnitPrice
order = a_row.OrderHeader
"""
2 issues make this a little more complicated than expected:
1. can't just alter AmountTotal - does not trigger Order's before_flush
2. can't just call Order's before_flush - old values not available
"""
old_order = ObjectView(row2dict(order))
order.AmountTotal += a_row.Amount
order_update(order, old_order, a_session)
row_prt(order, "order_detail_flush_new adjusted to: " +
str(order.AmountTotal))