mongoose-schema | 易学教程

Mongoose - Generate ObjectID for each object before saving document

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问题 I want generate an ObjectID for each Object present inside my array. The thing is I'm getting the products with a .forEach statement from another server and push them inside my array without a Schema that generates an ObjectID.... Product Schema: const productsSchema = new mongoose.Schema({ apiKey: String, domain: String, totalcount: Number, totaldone: Number, allSKUS: Array, allProducts: Array, created_at: { type: Date }, updated_at: { type: Date }, }, { collection: 'products', timestamps:

Mongoose advanced custom schema object type

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问题 I couldn't find any example of an advanced custom schema type involving custom objects (or value-objects) in Mongoose >=4.4. Imagine that I want to use a custom type like: function Polygon(c) { this.bounds = [ /* some data */ ]; this.npoints = /* ... */ /* ... initialize polygon ... */ }; Polygon.prototype.area = function surfaceArea() { /**/ }; Polygon.prototype.toObject = function toObject() { return this.bounds; }; Next, I implement a custom SchemaType like: function PolygonType(key,

Nested objects in mongoose schemas

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i've seen many answers to this question here, but i still don't get it (maybe because they use more "complex" examples)... So what im trying to do is a schema for a "Customer", and it will have two fields that will have nested "subfields", and others that may repeat. here is what i mean: let customerModel = new Schema({ firstName: String, lastName: String, company: String, contactInfo: { tel: [Number], email: [String], address: { city: String, street: String, houseNumber: String } } }); tel and email might be an array. and address will not be repeated, but have some sub fields as you can see.

How to drop index using Mongoose

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Mongoose Imagdata.dropIndexes( { "image_id": 1 }, function(err){ if(err){ res.send("error"); } else{ res.send("success"); } }); This is the code I used for remove the index of a field 'image_id'. When I trying to execute this function It shows "TypeError: Imagdata.dropIndexes is not a function". How to fix this issue... You need to use the raw collection property of your model to access the underlying MongoDB API: Imagdata.collection.dropIndex(...); 来源： https://stackoverflow.com/questions/34450547/how-to-drop-index-using-mongoose

Adding child document to existing mongodb document

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问题 Essentially I am just trying to add a new sub-document to my existing mongodb document that has the following schema /models/server/destination.js // this is the "destination" model for mongoose var mongoose = require('mongoose') var Adventure = require('../models/adventure') // this is the schema that every entry will get when a new trip is made. var tripSchema = mongoose.Schema({ name: { type: String, required: true }, city: { type: String, required: true }, dateStart: { type: Date,

Find one or create with Mongoose

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I have Page.findById(pageId).then(page => { const pageId = page.id; .. }); My problem is that if no page id is given, it should just take the first available page given some conditions, which is done by Page.findOne({}).then(page => { const pageId = page.id; .. }); but if no page is found, it should create a new page and use this, which is done with Page.create({}).then(page => { const pageId = page.id; .. }); But how do I combine all this to as few lines as possible? I have a lot of logic going on inside page => { ... } so I would very much like to do this smart, so I can avoid doing it like

How to use mongoose model schema with dynamic keys?

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问题 i'm using mongoose with nodejs, and i need to create a dynamic schema model, this is my code: schema.add({key : String}); key = "user_name", but in my db i found that the model take it as key { key : "Michele" } and not { user_name: "Michele"} What can i do? thank you. 回答1: The same issue schema with variable key is talked in mongoose, Nope not currently possible. Closest alternative is to use strict: false or the mixed schema type. 回答2: If I understand correctly, you want to add a new column