Develop Reference

Model.create is not a function at seed

I am trying to seed my db and this issue is preventing that. It keeps saying "Inventory.create is not a function
at seed". I am not sure if this is a syntactical issue, a logistical problem or even a dependency issue so please point me in the wrong direction.
The tech stack that I am using is Express, Node.js, Sequelize, PostgreSQL
My files are structured as such:
--script
-seed.js
--server
-api
-db
-Model.js
-index.js
-db.js
-app.js
-index.js
Model.js
const db = require('./db');
const Model = db.define('model', {
name: {
type: Sequelize.STRING,
allowNull: false,
},
total: {
type: Sequelize.FLOAT,
allowNull: false,
},
})
module.export = Model;
index.js
const db = require('./db')
const Inventory = require('./Inventory')
module.exports = {
db,
models: {
Inventory,
},
}
db.js
const Sequelize = require('sequelize')
const pkg = require('../../package.json')
const databaseName = pkg.name + (process.env.NODE_ENV === 'test' ? '-test' : '')
if(process.env.LOGGING === 'true'){
delete config.logging
}
if(process.env.DATABASE_URL){
config.dialectOptions = {
ssl: {
rejectUnauthorized: false
}
};
}
const db = new Sequelize(
process.env.DATABASE_URL || `postgres://localhost:5432/${databaseName}`, {
logging: false,
})
module.exports = db
seed.js
'use strict'
const {db, models: {Model}} = require('../server/db')
async function seed() {
await db.sync({ force: true })
console.log('db synced!')
// Creating Inventory
const stock = await Promise.all([
Model.create({ name: 'First', amount: 200 }),
Model.create({ name: 'Second', amount: 200 }),
])
console.log(`seeded successfully`)
}
async function runSeed() {
console.log('seeding...')
try {
await seed()
} catch (err) {
console.error(err)
process.exitCode = 1
} finally {
console.log('closing db connection')
await db.close()
console.log('db connection closed')
}
}
if (module === require.main) {
runSeed()
}
module.exports = seed
I included this just in case
package.json
{
"name": "ShopifyInventory",
"version": "1.0",
"description": "Simple backend heavy app for inventory management",
"main": "app.js",
"scripts": {
"build": "webpack",
"build:dev": "npm run build -- --watch --mode=development",
"seed": "node script/seed.js",
"start": "node server"
},
"dependencies": {
"axios": "^0.21.1",
"bcrypt": "^5.0.0",
"compression": "^1.7.3",
"express": "^4.18.1",
"history": "^4.9.0",
"jsonwebtoken": "^8.5.1",
"morgan": "^1.9.1",
"pg": "^8.7.3",
"pg-hstore": "^2.3.4",
"react": "^18.1.0",
"react-dom": "^18.1.0",
"react-router-dom": "^6.3.0",
"sequelize": "^6.19.2"
},
"author": "Galilior :)",
"devDependencies": {
"#babel/core": "^7.17.12",
"#babel/preset-react": "^7.17.12",
"babel-loader": "^8.2.5",
"webpack": "^5.72.1",
"webpack-cli": "^4.9.2"
}
}

changing next.js pages after building

My project has 2 folders: client(next.js with custom server) and server(node.js).
I have uploaded it in a Ubuntu 20.04 server and build next.js project in client folder. it works.
I have recently changed some pages of next.js and uploaded to client folder by "sudo git pull".
Now I would like to run "npm run build" to build next.js again, but it gives Error:
warn - No ESLint configuration detected. Run next lint to begin setup
Build error occurred
Error: > Build directory is not writeable. https://nextjs.org/docs/messages/build-dir-not-writeable
at /home/skadmin/client/node_modules/next/dist/build/index.js:275:19
at async Span.traceAsyncFn (/home/skadmin/client/node_modules/next/dist/telemetry/trace/trace.js:60:20)
at async Object.build [as default] (/home/skadmin/client/node_modules/next/dist/build/index.js:77:25)
info - Creating an optimized production build
==========My Custom server is:
'''
const express = require('express')
const next = require('next')
const { createProxyMiddleware } = require('http-proxy-middleware')
const dev = process.env.NODE_ENV !== 'production'
const app = next({ dev })
const handle = app.getRequestHandler()
app
.prepare()
.then(() => {
const server = express()
// apply proxy in dev mode
if (dev) {
server.use(
'/api',
createProxyMiddleware({
target: 'http://localhost:8000',
changeOrigin: true,
})
)
}
server.all('*', (req, res) => {
return handle(req, res)
})
server.listen(3000, (err) => {
if (err) throw err
console.log('> Ready on http://localhost:8000')
})
})
.catch((err) => {
console.log('Error', err)
})
'''
=======================package.json is=>:
'''
{
"name": "client",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"dev": "node server.js",
"build": "next build",
"start": "NODE_ENV=production node server.js"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"#ant-design/icons": "^4.5.0",
"#glidejs/glide": "^3.4.1",
"#material-ui/core": "^4.11.4",
"#material-ui/icons": "^4.11.2",
"#persian-tools/persian-tools": "^3.0.1",
"antd": "^4.13.1",
"axios": "^0.21.4",
"express": "^4.17.1",
"http-proxy-middleware": "^2.0.0",
"lodash": "^4.17.21",
"moment-jalaali": "^0.9.2",
"multer": "^1.4.4",
"next": "^11.1.3",
"react": "^17.0.2",
"react-dom": "^17.0.2",
"react-icons": "^4.2.0",
"react-image-file-resizer": "^0.4.7",
"react-markdown": "^6.0.2",
"react-scroll": "^1.8.2",
"react-toastify": "^7.0.4",
"reactstrap": "^8.9.0",
"swiper": "^7.4.1"
}
}
'''
Please help me, what should I do?

"Parsing error: Unexpected token => eslint"

I am seeing this error in my index.js file in VSC which looks to be caused by the app.post request.
I've attempted different parsing options in regards to eslint and emca but still aren't getting anywhere.
Appreciate any input.
Parsing error: Unexpected token => eslint
index.js
const functions = require("firebase-functions");
const express = require("express");
const cors = require("cors");
const stripe = require("stripe")("hidden");
// Setting Up the API
// - App Config
const app = express();
// - Middlewares
app.use(cors({ origin: true }));
app.use(express.json());
// - API routes
app.get("/", (request, response) => response.status(200).send("hello world"));
app.post("/payments/create", async (request, response) => {
const total = request.query.total;
console.log("Payment Request Recieved for this amount >>> ", total);
const paymentIntent = await stripe.paymentIntents.create({
amount: total, // subunits of the currency
currency: "usd",
});
// OK - Created
response.status(201).send({
clientSecret: paymentIntent.client_secret,
});
});
// - Listen command
exports.api = functions.https.onRequest(app);
This is my package.json
{
"name": "functions",
"description": "Cloud Functions for Firebase",
"scripts": {
"lint": "eslint .",
"serve": "firebase emulators:start --only functions",
"shell": "firebase functions:shell",
"start": "npm run shell",
"deploy": "firebase deploy --only functions",
"logs": "firebase functions:log"
},
"engines": {
"node": "14"
},
"main": "index.js",
"dependencies": {
"cors": "^2.8.5",
"express": "^4.17.1",
"firebase-admin": "^9.8.0",
"firebase-functions": "^3.14.1",
"stripe": "^8.174.0"
},
"devDependencies": {
"#babel/core": "^7.15.5",
"#babel/eslint-parser": "7.15.4",
"eslint": "^7.6.0",
"eslint-config-google": "^0.14.0",
"eslint-plugin-react": "^7.25.1",
"firebase-functions-test": "^0.2.0"
},
"private": true
}
And then this is my .eslintrc.js file
module.exports = {
root: true,
env: {
es6: true,
node: true,
},
extends: [
"eslint: recommended",
"google",
"plugin: react/recommended",
],
rules: {
quotes: ["error", "double"],
},
};

Seems like you're missing parser: #babel/eslint-parser from your eslintrc

Why isn't my mongoose sort method working?

All right. So. I have a really basic API running on Node.js. I'm also using MongoDB as a database and I'm using Mongoose to build queries. My problem is that I'm trying to query for a sorted list of data using using the mongoose 'sort' method. For some reason the method isn't working and Node tries to use the Javascript sort method instead. This is my code:
Query handling:
const mongoose = require("mongoose");
const express = require("express");
const Tour = require("../models/tourModel.js");
exports.getAllTours = async (req, res) => {
try {
// eslint-disable-next-line node/no-unsupported-features/es-syntax
const queryObject = { ...req.query };
const excludedFields = ["page", "sort", "limit", "fields"];
excludedFields.forEach((el) => delete queryObject[el]);
let queryStr = JSON.stringify(queryObject);
queryStr = queryStr.replace(/\b(gte|gt|lte|lt)\b/g, (match) => `$${match}`);
let query = await Tour.find(JSON.parse(queryStr));
// query.sort((a, b) => (a[req.query.sort] > b[req.query.sort] ? 1 : -1));
if (req.query.sort) {
query = query.sort(req.query.sort);
}
const tours = await query;
res.status(200).json({
status: "success",
data: { tours },
});
} catch (error) {
res.status(400).json({ status: "failed", message: error.message });
}
};
Router
const tourController = require("../controllers/tourController");
const router = express.Router();
// router.param("id", tourController.checkID);
router
.route("/")
.get(tourController.getAllTours)
.post(tourController.createTour);
router
.route("/:id")
.get(tourController.getTourById)
.patch(tourController.updateTour)
.delete(tourController.deleteTour);
module.exports = router;
Package.json
"name": "natours",
"version": "1.0.0",
"description": "fdsfd",
"main": "index.js",
"scripts": {
"start:dev": "nodemon server.js",
"start:prod": "nodemon server.js NODE_ENV=production "
},
"author": "me",
"license": "ISC",
"dependencies": {
"dotenv": "^8.2.0",
"express": "^4.17.1",
"mongoose": "^5.12.7",
"morgan": "^1.10.0"
},
"devDependencies": {
"eslint": "^7.25.0",
"eslint-config-airbnb": "^18.2.1",
"eslint-config-prettier": "^8.3.0",
"eslint-plugin-import": "^2.22.1",
"eslint-plugin-jsx-a11y": "^6.4.1",
"eslint-plugin-node": "^11.1.0",
"eslint-plugin-prettier": "^3.4.0",
"eslint-plugin-react": "^7.23.2",
"prettier": "^2.2.1"
}
}
When I try to query for 127.0.0.1:3000/api/v1/tours?sort=price,
I get a response
{
"status": "failed",
"message": "The comparison function must be either a function or undefined"
}
I'm a real noob in this so does anyone have any ideas what is causing this or how to fix it?

let query = await Tour.find(JSON.parse(queryStr));
This is the result of your query since await executes the query. If you want to store the query, don't use await
let query = Tour.find(JSON.parse(queryStr));
// query.sort((a, b) => (a[req.query.sort] > b[req.query.sort] ? 1 : -1));
if (req.query.sort) {
query = query.sort(req.query.sort);
}
const tours = await query;

Nest: Cannot create a new connection named "default", because connection with such name already exist and i t now has an active connection session

I am trying to create a seeder file in nestjs, the problem is when I run the project using start:dev, somehow nestjs also start seed.ts file with main.ts file. How can I make nestjs not start seed file when I run the project either on prod/dev but seed must be called only when I run the seed script.
Here is the seed.ts code
import { NestFactory } from '#nestjs/core'
import { Logger } from '#nestjs/common'
import { SeederModule } from './database/seeder.module'
import { Seeder } from './database/seeder'
async function bootstrap() {
NestFactory.createApplicationContext(SeederModule)
.then((appContext) => {
const logger = appContext.get(Logger)
const seeder = appContext.get(Seeder)
seeder
.seedRoles()
.then(() => {
logger.debug('Seeding Roles complete!')
})
.catch((error) => {
logger.error('Seeding Roles failed!')
throw error
})
seeder
.seedAdmin()
.then(() => {
logger.debug('Seeding Admin complete!')
})
.catch((error) => {
logger.error('Seeding Admin failed!')
throw error
})
.finally(() => appContext.close())
})
.catch((error) => {
throw error
})
}
bootstrap()
Here is the main.ts file for nestJS
import { Logger, ValidationPipe } from '#nestjs/common'
import { NestFactory } from '#nestjs/core'
import { AppModule } from './modules/app/app.module'
async function bootstrap() {
const app = await NestFactory.create(AppModule)
app.enableCors()
const port = process.env.PORT || 3000
app.useGlobalPipes(new ValidationPipe())
await app
.listen(port)
.then(() => {
Logger.log(`App listening on port ${port}`)
})
.catch((err) => {
Logger.log(`Error while connecting to port ${port}`, err)
})
}
bootstrap()
And here is the package.json file
{
"name": "jugg-website",
"version": "0.0.1",
"description": "",
"author": "",
"private": true,
"license": "UNLICENSED",
"scripts": {
"prebuild": "rimraf dist",
"build": "nest build",
"format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
"start": "nest start",
"start:dev": "link-module-alias && nest start --watch",
"start:debug": "nest start --debug --watch",
"start:prod": "node dist/main",
"lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
"test": "jest",
"test:watch": "jest --watch",
"test:cov": "jest --coverage",
"test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
"test:e2e": "jest --config ./test/jest-e2e.json",
"seed": "ts-node -r tsconfig-paths/register src/seed.ts"
},
"dependencies": {
"#nestjs/common": "^7.6.13",
"#nestjs/core": "^7.6.13",
"#nestjs/jwt": "^7.2.0",
"#nestjs/passport": "^7.1.5",
"#nestjs/platform-express": "^7.6.13",
"#nestjs/typeorm": "^7.1.5",
"class-transformer": "^0.4.0",
"class-validator": "^0.13.1",
"config": "^3.3.6",
"link-module-alias": "^1.2.0",
"passport": "^0.4.1",
"pg": "^8.5.1",
"reflect-metadata": "^0.1.13",
"rimraf": "^3.0.2",
"rxjs": "^6.6.6",
"typeorm": "^0.2.32"
},
"devDependencies": {
"#nestjs/cli": "^7.5.6",
"#nestjs/schematics": "^7.2.7",
"#nestjs/testing": "^7.6.13",
"#types/express": "^4.17.11",
"#types/jest": "^26.0.20",
"#types/node": "^14.14.31",
"#types/supertest": "^2.0.10",
"#typescript-eslint/eslint-plugin": "^4.15.2",
"#typescript-eslint/parser": "^4.15.2",
"eslint": "^7.20.0",
"eslint-config-prettier": "^8.1.0",
"eslint-plugin-prettier": "^3.3.1",
"jest": "^26.6.3",
"prettier": "^2.2.1",
"supertest": "^6.1.3",
"ts-jest": "^26.5.2",
"ts-loader": "^8.0.17",
"ts-node": "^9.1.1",
"tsconfig-paths": "^3.9.0",
"typescript": "^4.1.5"
},
"jest": {
"moduleFileExtensions": [
"js",
"json",
"ts"
],
"rootDir": "src",
"testRegex": ".*\\.spec\\.ts$",
"transform": {
"^.+\\.(t|j)s$": "ts-jest"
},
"collectCoverageFrom": [
"**/*.(t|j)s"
],
"coverageDirectory": "../coverage",
"testEnvironment": "node"
}
}

you can try setting KeepConnectionAlive option to true in typeOrm
configuration in the app.module file
https://github.com/nestjs/typeorm/issues/61

I was getting this error when running e2e tests. I found that the default nestjs template sets up the e2e tests with a beforeEach like this:
beforeEach(async () => {
const moduleFixture: TestingModule = await Test.createTestingModule({
imports: [AppModule],
}).compile();
app = moduleFixture.createNestApplication();
await app.init();
});
But since I had more than one test in the spec file (I'm a newbie to node.js dev so not sure whether this is the right thing to do or not, but regardless...), what was happening was the app was being initialised once per test which meant it was attempting to create multiple connections to the database.
The solution was quite simple. Change the beforeEach to beforeAll
beforeAll(async () => {
const moduleFixture: TestingModule = await Test.createTestingModule({
imports: [AppModule],
}).compile();
app = moduleFixture.createNestApplication();
await app.init();
});
And don't forget to close the app when the tests are done
afterAll(async () => {
await app.close();
});

In my case, the problem was in my main.ts file. I ran my module with the TypeORM twice without noticing, because I was trying access my ConfigService so that I could use environment variables for some other service than my TypeORM database connection.
main.ts that causes the error:
...
async function bootstrap(): Promise<void> {
// the next line actually initiates a DB connection
const appContext = await NestFactory.createApplicationContext(MailModule);
const configService = appContext.get<ConfigService>(ConfigService);
// by now, we already established a DB connection, so trying to
// reinstantiate the connection will cause the error
const app = await NestFactory.createMicroservice<MicroserviceOptions>(
MailModule,
{
transport: Transport.REDIS,
options: {
port: configService.get<number>('REDIS.PORT'),
host: configService.get<string>('REDIS.HOST'),
},
},
);
await app.listen();
}
bootstrap();
The solution:
...
async function bootstrap(): Promise<void> {
const appContext = await NestFactory.createApplicationContext(MailModule);
// we close the redundant connection before we mount the app.
await getConnection('default').close();
const configService = appContext.get<ConfigService>(ConfigService);
const app = await NestFactory.createMicroservice<MicroserviceOptions>(
MailModule,
{
transport: Transport.REDIS,
options: {
port: configService.get<number>('REDIS.PORT'),
host: configService.get<string>('REDIS.HOST'),
},
},
);
await app.listen();
}
bootstrap();