当前，我正以这种方式将数据添加到我的模型表单中：new_order =
order.save(commit=False)
new_order.total_gross = total_amount
new_order.total_tax = total_tax_amount
new_order.total_gross_converted = total_amount # TODO Marc
new_order.event = event
new_order.order_reference = session_order_reference
new_order.status = 'pending' # TODO Marc
new_order.save()
我现在想知道是否有一种“更好” /更干净的方法。有人做过吗？
不幸的是，这是行不通的：
new_order_dict = {
'total_gross': total_amount,
'total_tax': total_tax_amount,
'total_gross_converted': total_amount,
'event': event,
'order_reference': session_order_reference,
'status': 'pending',
}
new_order = order.save(commit=False)
new_order.append(**new_order_dict)
new_order.save()
答案 0 :(得分：3)
一种简单的解决方法是使用UnhandledPromiseRejectionWarning: MongoError: user is not allowed to do action [insert] on [test.products]
at C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\connection\pool.js:598:61
at authenticateStragglers (C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\connection\pool.js:516:16)
at Connection.messageHandler (C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\connection\pool.js:552:5)
at emitMessageHandler (C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\connection\connection.js:309:10)
at TLSSocket.<anonymous> (C:\Users\Hiary\Documents\rest-api\node_modules\mongodb-core\lib\connection\connection.js:452:17)
at TLSSocket.emit (events.js:180:13)
at addChunk (_stream_readable.js:274:12)
at readableAddChunk (_stream_readable.js:261:11)
at TLSSocket.Readable.push (_stream_readable.js:218:10)
at TLSWrap.onread (net.js:581:20)
(node:21692) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
：
setattr(..)这是有效的，因为for k, v in new_order_dict.items():
setattr(new_order, k, v)
new_order.save()
等效于setattr(x, 'y', z)（请注意，在x.y = z中，我们在字符串中使用setattr(..)）。因此，我们遍历字典的'y'（一个2元组的迭代，其中每个元组都包含一个 key .items()和 value {{1 }}），然后调用k将名称为v的属性设置为setattr(..)。
最后，我们执行k。