app.js

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

const Event = require('./models/event');
const app = express();

app.use(bodyParser.json());

app.use('/graphql', graphqlHttp({
    schema: buildSchema(`
        type Event {
            _id: ID!,
            title: String!
            description: String!
            price: Float!
            date: String!
        }

        input EventInput {
            title: String!
            description: String!
            price: Float!
            date: String!
        }

        type RootQuery {
            events: [Event!]!
        }

        type RootMutation {
            createEvent(eventInput: EventInput): Event
        }

        schema {
            query: RootQuery 
            mutation: RootMutation
        }
    `),
    rootValue: {
        events: () => {
            return Event.find().then(events => {
                return events.map(event => {
                    return { ...event._doc }
                })
            }).catch(err => {
                throw err
            });
        },
        createEvent: args => {
            /* const event = {
                _id: Math.random().toString(),
                title: args.eventInput.title,
                description: args.eventInput.description,
                price: +args.eventInput.price,
                date: args.eventInput.date
            } */

            const event = new Event({
                title: args.eventInput.title,
                description: args.eventInput.description,
                price: +args.eventInput.price,
                date: args.eventInput.date
            })
            return event.save().then(result => {
                console.log(result);
                return { ...result._doc };
            }).catch(err => {
                console.log(err);
                throw err;
            });
        }
    },
    graphiql: true
}));
// app.get('/', (req, res, next) => {
//     res.send("Hello World");
// });
mongoose.connect(
    `mongodb+srv://${process.env.MONGO_USER}:${
    process.env.MONGO_PASSWORD}@cluster0-qpj2g.mongodb.net/${process.env.MONGO_DB}?retryWrites=true&w=majority`
).then(() => {
    app.listen(3000);
}).catch(err => {
    console.log(err);
})