Comments (2)
This is expected behavior, but something we need to make more clear in the docs.
Unfortunately MongoDB's replaceOne()
means replace the whole document except _id
, and there's no way to preserve createdAt
when updating.
For preserving createdAt
with replaceOne()
, your best bet is to use the "pull the timestamp from the _id" trick:
schema.virtual('createdAt').get(function() {
return this._id.getTimestamp();
});
This approach works presuming you always use the default _id
from mongoose.
const mongoose = require('mongoose');
const { Schema } = mongoose;
const productSchema = new Schema({
name: {
type: String,
required: true,
},
price: {
type: Number,
required: true,
min: 0,
},
}, {
timestamps: true
});
const ProductModel = mongoose.model('Product', productSchema);
async function run() {
await mongoose.connect('mongodb://localhost:27017');
await mongoose.connection.dropDatabase();
const createdProduct = await ProductModel.create({ name: 'Product', price: 18 });
console.log('what is createdProduct', createdProduct);
const res = await ProductModel.replaceOne({ _id: createdProduct.id}, { name: 'Changed Product' });
console.log('what is res', res);
console.log(await ProductModel.findOne());
}
run();
from mongoose.
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from mongoose.