javascript 如何填充（）猫鼬 .findOneAndUpdate 对象
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how to populate() a mongoose .findOneAndUpdate object
提问by Jorre
The code below works, it updates a record or creates one if it doesn't exist yet. However, I'd like to combine this findOneAndUpdate()statement with the populate()method in order to populate the "user" of my object. What would be the right way to add the populate("user")statement to this logic?
下面的代码有效，它会更新一条记录，如果尚不存在则创建一条记录。但是，我想将此findOneAndUpdate()语句与populate()方法结合起来，以填充我的对象的“用户”。将populate("user")语句添加到此逻辑的正确方法是什么？
I tried adding the populate()method after the findOneAndUpdatefinishes but that returns an error saying that this method doesn't exist. I'm running the latest version of mongoose.
我尝试populate()在findOneAndUpdate完成后添加该方法，但返回一个错误，指出该方法不存在。我正在运行最新版本的猫鼬。
LoyaltyCard.findOneAndUpdate({ business: businessid}, { $set: newCard, $inc: { stamps: +1 } }, { upsert: true}, function(err, card){
if(err)
{
}
else
{
}
res.json(result);
});
回答by Gergo Erdosi
Use exec()instead of a callback parameter:
使用exec()而不是回调参数：
LoyaltyCard.findOneAndUpdate(
{business: businessid},
{$set: newCard, $inc: {stamps: +1}},
{upsert: true}
)
.populate('user')
.exec(function(err, card) {
if (err) {
// ...
} else {
res.json(result);
}
});
回答by davidsonsns
With async/awaitI removed the exec
随着async/await我删除了 exec
const getLoyaltyCard = async () => {
const results = await LoyaltyCard.findOneAndUpdate(
{ business: businessid },
{ $set: newCard, $inc: { stamps: + 1 } },
{ upsert: true }
)
.populate('user')
return results
}
