mongoose

问题 I have two distinct documents as Accounts [ {_id:1, name:'xyz'}, {_id:2, name:'abc'}, {_id:3, name:'def'}, {_id:4, name:'pqr'}, ] and Responses [ {_id:01, accountId:2, questionId: 0001, res: true}, {_id:02, accountId:2, questionId: 0002, res: true}, {_id:03, accountId:1, questionId: 0003, res: false}, {_id:03, accountId:3, questionId: 0002, res: false}, {_id:03, accountId:2, questionId: 0003, res: false}, ] How can I count number of true and false responses for an individual account while

问题 I have two distinct documents as Accounts [ {_id:1, name:'xyz'}, {_id:2, name:'abc'}, {_id:3, name:'def'}, {_id:4, name:'pqr'}, ] and Responses [ {_id:01, accountId:2, questionId: 0001, res: true}, {_id:02, accountId:2, questionId: 0002, res: true}, {_id:03, accountId:1, questionId: 0003, res: false}, {_id:03, accountId:3, questionId: 0002, res: false}, {_id:03, accountId:2, questionId: 0003, res: false}, ] How can I count number of true and false responses for an individual account while

问题 I have a mongoose schema method that inserts a new record then returns an activation code. In my tests I want to call this method then run a query that verifies some things about the record it has added. The problem is the method returns before the record has become visible to the subsequent query, even though I am awaiting the .save before returning. I have verified this by adding a delay between the method call and the subsequent query. Without the delay the second query returns null. With

问题 It is to my understanding that callback functions are asynchronous and cannot return a value like regular functions. Upon reading about promises, I thought I grasped a good understanding about them, that they are basically an enhanced version of callbacks that allows returning a value like asynchronous function. In my getConnections method, I am attempting to call the find() function on my database through mongoose, and I am attempting to grab this array of objects and send it to the views.

问题 I'm trying to create a schema subdocument but am getting the error listed above, The schemas in question look like this Schema casuing issues const mongoose = require('mongoose'); const Schema = mongoose.Schema const CharacterSchema = new Schema(); CharacterSchema.add({ name: { type: String, required: true }, title: { type: String }, charcterClass: { // will be limited in form creation type: String }, level: { type: Number } }); const Charcter = mongoose.model('User', CharacterSchema); module

问题 I'm trying to create a schema subdocument but am getting the error listed above, The schemas in question look like this Schema casuing issues const mongoose = require('mongoose'); const Schema = mongoose.Schema const CharacterSchema = new Schema(); CharacterSchema.add({ name: { type: String, required: true }, title: { type: String }, charcterClass: { // will be limited in form creation type: String }, level: { type: Number } }); const Charcter = mongoose.model('User', CharacterSchema); module

问题 The below code works perfectly: const Course = mongoose.model('Course',courseSchema) async function foo(){ const nodeCourse = new Course({ name: "Node JS Course", author: "foo", tags: ['node','backend'] }) const result = await nodeCourse.save() console.log(result) } foo() But this one gives an error: const Course = mongoose.model('Course',courseSchema) (async ()=>{ const nodeCourse = new Course({ name: "Node JS Course", author: "foo", tags: ['node','backend'] }) const result = await

问题 I have schema where a property always equals 1. I have found a solution, but I don't like it: var schema = new Schema({ a: Number }); schema.pre('save', function(){ this.a = 1; }); Can you please tell me if there is better way to do this? For example: var schema = new Schema({ a: 1 }); 回答1: How about using a default value, does it achieve what you want ? var schema = new Schema({ a: {type: Number, default: 1} }); If you want to force it, the pre version is the best option. 回答2: Another way to

问题 I'm trying to figure out how to do server side pagination for a single document that contains a blacklistGroup: [String] field "blacklistGroup": [ "5e99fd3aa506cf570056898d", "5e99fde5a506cf5700568991", "5e99fd64a506cf570056898e", "5e98c950f4fb3f63b4634e30", "5e99fd15a506cf570056898c", "5e99fda5a506cf570056898f", "5e99fdc7a506cf5700568990", "5e99fcf3a506cf570056898b", "5e98e90d85e69146f841d23a", "5e9867ff5e72550988820dd3", "5e98e8e785e69146f841d239" ] I want it to limit 10 at a time. I'm

问题 I'm trying to figure out how to do server side pagination for a single document that contains a blacklistGroup: [String] field "blacklistGroup": [ "5e99fd3aa506cf570056898d", "5e99fde5a506cf5700568991", "5e99fd64a506cf570056898e", "5e98c950f4fb3f63b4634e30", "5e99fd15a506cf570056898c", "5e99fda5a506cf570056898f", "5e99fdc7a506cf5700568990", "5e99fcf3a506cf570056898b", "5e98e90d85e69146f841d23a", "5e9867ff5e72550988820dd3", "5e98e8e785e69146f841d239" ] I want it to limit 10 at a time. I'm