[英]Mongodb update multiple documents with different values
I have been trying to use updatemany
with mongoose.我一直在尝试将
updatemany
与updatemany
一起使用。 I want to update the values in database using an array of objects.我想使用对象数组更新数据库中的值。
[
{
"variantId": "5e1760fbdfaf28038242d676",
"quantity": 5
},
{
"variantId": "5e17e67b73a34d53160c7252",
"quantity": 13
}
]
I want to use variantId as filter.我想使用 variantId 作为过滤器。 Model schema is:
模型架构是:
let variantSchema = new mongoose.Schema({
variantName: String,
stocks: {
type: Number,
min: 0
},
regularPrice: {
type: Number,
required: true
},
salePrice: {
type: Number,
required: true
}
})
I want to filter the models using variantId and then decrease the stocks.我想使用 variantId 过滤模型,然后减少库存。
As you need to update multiple documents with multiple criteria then .updateMany()
wouldn't work - it will work only if you need to update multiple documents with same value, Try this below query which will help you to get it done in one DB call :由于您需要使用多个条件更新多个文档,那么
.updateMany()
将不起作用 - 只有当您需要更新具有相同值的多个文档时它才会起作用,请尝试以下查询,这将帮助您在一个数据库中完成它称呼 :
const Mongoose = require("mongoose");
let variantSchema = new mongoose.Schema({
variantName: String,
stocks: {
type: Number,
min: 0
},
regularPrice: {
type: Number,
required: true
},
salePrice: {
type: Number,
required: true
}
})
const Variant = mongoose.model('variant', variantSchema, 'variant');
let input = [
{
"variantId": "5e1760fbdfaf28038242d676",
"quantity": 5
},
{
"variantId": "5e17e67b73a34d53160c7252",
"quantity": 13
}
]
let bulkArr = [];
for (const i of input) {
bulkArr.push({
updateOne: {
"filter": { "_id": Mongoose.Types.ObjectId(i.variantId) },
"update": { $inc: { "stocks": - i.quantity } }
}
})
}
Variant.bulkWrite(bulkArr)
Ref : MongoDB-bulkWrite参考: MongoDB-bulkWrite
I don't think this can be done with a single Model.updateMany
query.我不认为这可以通过单个
Model.updateMany
查询来完成。 You will need to loop the array and use Model.update
instead.您将需要循环数组并改用
Model.update
。
for (const { variantId, quantity } of objects) {
Model.update({ _id: variantId }, { $inc: { stocks: -quantity } });
}
To run this in a transaction ( https://mongoosejs.com/docs/transactions.html ), the code should look something like this (however I have not tried or tested this):要在事务 ( https://mongoosejs.com/docs/transactions.html ) 中运行它,代码应该看起来像这样(但是我还没有尝试或测试过):
mongoose.startSession().then(async session => {
session.startTransaction();
for (const { variantId, quantity } of objects) {
await Model.update({ _id: variantId }, { $inc: { stocks: -quantity } }, { session });
}
await session.commitTransaction();
});
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