WebJan 26, 2024 · const mongoose = require ('mongoose'); const { ObjectId } = mongoose.Schema.Types; const cardSchema = new mongoose.Schema ( { name: { type: String, required: true }, localDevice: [ { type: ObjectId, required: true, refPath: 'onModel' } ], onModel: { type: ObjectId, enum: ['location', 'device'] } }, { timestamps: true } ); const … WebMar 25, 2024 · The refPath option is a more sophisticated alternative to ref. If ref is just a string, Mongoose will always query the same model to find the populated subdocs. With …

Populate trong Mongoose - Freetuts

WebMongoose Ref Validator. Provides a mongoose plugin that can be used to verify that a document which references other documents is referring to documents that actually exist. This plugin works by performing a count query for documents in the relevant collection with the ID or field specified as the foreign key in the document being validated. Web7. Liên kết động với refPath. Mongoose cho phép chúng ta liên kết với nhiều collections thông qua trường giá trong model. const commentSchema = new Schema ({body: {type: String, required: true}, on: {type: Schema. Types. four idiots

How to add elements into array that can contain two different

WebR 线图形状,r,dataframe,ggplot2,R,Dataframe,Ggplot2,我想创建一个折线图，显示特定日期内不同的测量时间。请看下面的线图-但是我如何才能改变每天有7种不同类型的线，而不是有尖峰？ WebApr 22, 2024 · import mongoose from 'mongoose'; beforeAll(async () => mongoose.connect(process.env.MONGO_URL as string)); afterAll(async () => mongoose.disconnect()); it('Mongoose getModelsMapForPopulate issue', async () => { const nested = new mongoose.Schema( { // nothing here }, { discriminatorKey: 'type' } ); const … http://duoduokou.com/javascript/40867256313987088192.html four idiots and a grape