Question 400873 in Json Question posted in
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Json – Struggling with a MongoDB YouTube tutorial

const express = require('express');
const bodyParser = require('body-parser');
const graphqlHttp = require('express-graphql');
const { buildSchema } = require('graphql');

const app = express();

app.use(bodyParser.json());

app.use(
  '/graphql',
  graphqlHttp({
    schema: buildSchema(`
        type RootQuery {
            events: [String!]!
        }

        type RootMutation {
            createEvent(name: String): String
        }

        schema {
            query: RootQuery
            mutation: RootMutation
        }
    `),
    rootValue: {
      events: () => {
        return ['Romantic Cooking', 'Sailing', 'All-Night Coding'];
      },
      createEvent: (args) => {
        const eventName = args.name;
        return eventName;
      }
    },
    graphiql: true
  })
);

app.listen(3000);

I tried using the following tutorial from YouTube.

https://www.youtube.com/watch?v=LXTyzk2uud0&list=PL55RiY5tL51rG1x02Yyj93iypUuHYXcB_&index=3

It didn’t work. Instead I get:

nodemon app crashed – waiting for file changes before starting…

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0 
        F:Files not on HDD1ProjectsCodegraphql-react-event-booking>npm start

> [email protected] start
> nodemon app.js

[nodemon] 3.1.4
[nodemon] to restart at any time, enter `rs`
[nodemon] watching path(s): *.*
[nodemon] watching extensions: js,mjs,cjs,json
[nodemon] starting `node app.js`
node:internal/modules/cjs/loader:1056
  throw err;
  ^

Error: Cannot find module 'express-graphql'
Require stack:
- F:Files not on HDD1ProjectsCodegraphql-react-event-bookingapp.js
    at Module._resolveFilename (node:internal/modules/cjs/loader:1053:15)
    at Module._load (node:internal/modules/cjs/loader:898:27)
    at Module.require (node:internal/modules/cjs/loader:1120:19)
    at require (node:internal/modules/helpers:112:18)
    at Object.<anonymous> (F:Files not on HDD1ProjectsCodegraphql-react-event-bookingapp.js:3:23)
    at Module._compile (node:internal/modules/cjs/loader:1239:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1293:10)
    at Module.load (node:internal/modules/cjs/loader:1096:32)
    at Module._load (node:internal/modules/cjs/loader:935:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:84:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    'F:\Files not on HDD1\Projects\Code\graphql-react-event-booking\app.js'
  ]
}

Node.js v19.4.0
[nodemon] app crashed - waiting for file changes before starting...

  2. 0

    There should be a more detailed error message above "nodemon app crashed". But anyways, there is a top comment in the youtube video that says graphqlHttp is not imported properly. It should be:

    const { graphqlHTTP } = require('express-graphql');

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