How to fetch mongodb result in graphql

Question

const axios = require(\'axios\');
const mongodb = require(\'mongodb\');

const MongoClient = mongodb.MongoClient;
const url = \"mongodb://localhost:27017/graphql\";
         


        

Answer 1

here how you connect express-graphql

const express = require('express');
const expressGraphQL = require('express-graphql');
const schema = require('./schema');

const app = express();


app.use(
   '/graphql',
   expressGraphQL({
     schema,
     graphiql: true
    })
);

you return the connection in the resolve correct it to

 resolve(parent, args) {
         MongoClient.connect(url, (err, client) => {
             return  client.db('graphql').collection('users').find()
         });
 }

Answer 2

You can return promises that return the value from the resolver. In your case you're returning a callback function and you're not returning the inner promise.

Also here you're connecting to the database in your resolver so you will be connecting/disconnecting from the database on every request to your API which is not a good practice. its better to connect once and reuse the connection

const client = await MongoClient.connect(url)
// Root Query
const RootQuery = new GraphQLObjectType({
    name: 'RootQueryType',
    fields: {
        launches: {
        type: new GraphQLList(LaunchType),
            resolve(parent, args) {
                return client.db('graphql').collection('users').find()
                });
            }
        },
    }
});
module.exports = new GraphQLSchema({
query: RootQuery
});