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Is mongoose's validator invalid for update?
mongoose defines required, min, max and other validators in scheme, which seems to validate only the documents to be inserted by create (), but does not seem to validate the documents to be updated by update ().
if so, what is the use of this validati...
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What is the difference between mongoose's error report: timed out and socket closed? Under what circumstances do they appear?
recently, an interface for reading data has been found to take too long to return in the production environment. Project uses nodejs + mongodb Development dependency:
questions such as title:
what is the difference between: timed out and so...
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The problem of how mongoose, mongodb db.collection.find () syntax is introduced into query
query
router.get(" cartList", (req, res, next) => {
User.findOne({ userId: 123456 }, (err, doc) => { });
}
query
router.get(" cartList", (req, res, next) => {
let userId = req.cookies.userId
console.log(user...
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How do I view all the syntax of Mongoose?
I have read the document for a long time, and I have a general understanding of the concept grammar and so on, but when I really write it, I still have a lot of problems and always get stuck.
such as the following
this.ctx.model.Role.remove({ _id: { ...
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How to set objectId to userId when mongoose creates a user
const UserSchema = new Schema({
userId:Schema.Types.ObjectId,
username: String,
mobile: String,
password: String,
remarks: String,
createAt: {type: Date, default: Date.now},
updateAt: {type: Date, default: Date.now},
...
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How to view and set the lock granularity of mongodb
my mongodb is a MMAPv1 engine, how to view and set lock granularity? ...
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Array type insertion values for mongoose object types
the model is designed as follows
const RegistrationSheet = mongoose.model( RegistrationSheet , new Schema({
doctorId: String,
today: {
time: String,
date: {
morning: [
{
number:Number,
patient: ...
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Spring boot connection mongodb error Exc sending message CertificateException
the local startup project reported an error, the same code configuration, but there is no problem with others. solve the reason,
{ "exception ": "com.mongodb.MongoSocketWriteException: Exception sending messagerntat com.mongodb.connection.Interna...
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How mongoose updates a subdocument in a subdocument array
The structure is shown in the figure. Steps is an array. Now you want to modify the count value of a specified date.
...
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Problems with mongoose query
Room schema
var Room = new Schema({
title: String,
author: String,
body: String,
owners: [ { type: ObjectId, ref: User , index: true } ]
})
Room.find({ owners: user })
first question: why can the query here be written this way? How...
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What do you do with the original data after mongodb adjusts the schema?
after mongodb has designed the schema, it has been running normally for some time (data is already available). When you adjust the schema later, for example, to add a field and decrease a field, what to do with the original data? do you have to wash the ...
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With this structure, how should the mongose query statement be written?
requirements, filter the time range of the data and describe the picture
meta: {
createAt: {
type: Date,
dafault: Date.now()
},
updateAt: {
type: Date,
dafault: Date.now()
}
}
...
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How to use mongoose to query embedded data?
const userSchema = new Schema({
name:{type:String},
clubnumber:{type:String},
memo:[{
memos:{type:String}
}]
})
the data structure is as above. Now you want to match name and clubnumber, to query all the memo under the library
db.userModel....
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Mongoose data formatting
const Article = new Schema({
Title: { type: String, required: true },
Content: { type: String, required: true },
CreatedAt: { type: Date, default: new Date, get: v => moment(v).format( YYYY-MM-DD HH:mm )},
UpdatedAt: { type: Date, d...
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How does mongoose handle a multi-tier circular query, modify the query results, and then return the final results?
problem description
there is a shopping cart cartList field under the user table. The field type is as follows:
cartList: [
{
shopId: {
type: Schema.ObjectId
},
shopName: String,
goodsList: [
...
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Mongoose Association query
when you associate with mysql, you can use id to associate, and you can store two tables during the same database operation. Because the primary key id can be self-increasing and is not affected by other factors, the two tables can be associated with id,...
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Mongoose fuzzy query questions, ask code friends for help
problem description
for example, take the World Foreign language School as an example. When you use mongoose s $regex for fuzzy matching, you can match when you enter keywords such as the world and foreign languages, but when you enter keywords that ...
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Nodejs mongoose connection copy set configuration
topic description
the following is a set of built replicas, where 12 nodes are arbitration nodes 192.168.1.10 br 27017 192.168.1.11 purl 27017 192.168.1.12 purl 27017
replica set set is: sss
nodejs uses mongoose middleware to connect to mongodb...
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Mongodb's Subdocuments update question?
[
{
_id:001
...
arrs:[{name: a ,score:10},
{name: b ,score:11},
{name: c ,score:12},
{name: d ,score:13}
]
}
{
_id:002
...
arrs:[{name: a ,score:11},
{name: b ,score:12},
{name: c ,score:13},
{name: ...
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Unexpected token import
koa connects to mongodb database time error Unexpected token import, has been introduced into babel
server.js
const db = require( . mongodb db );
const Koa = require( koa );
const webpack = require( webpack );
const merge = require( webpack-m...
