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server.js
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server.js
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var express = require('express');
var graphqlHTTP = require('express-graphql');
var { buildSchema } = require('graphql');
var app = express();
// Construct a schema, using GraphQL schema language
var schema = buildSchema(`
type Query {
book(id: Int!): Book
books: [Book!]!
}
type Book {
id: Int!
name: String
author: String
published: String
genre: String
rating: String
}
`);
// Getting data locally instead of DB
var bookArray = [
{
id: 1,
name: 'Anna Karenina',
author: 'Leo Tolstoy',
published: '1877',
genre: 'Literary realism',
rating: '4/5'
},
{
id: 2,
name: 'Madame Bovary',
author: 'Gustave Flaubert',
published: '1856',
genre: 'Literary realism',
rating: '3.6/5'
},
{
id: 3,
name: 'War and Peace',
author: 'Leo Tolstoy',
published: '1867',
genre: 'Historical Fiction',
rating: '4.1/5'
},
{
id: 4,
name: 'Hamlet',
author: 'William Shakespeare',
published: '1609',
genre: 'Tragedy',
rating: '4.1/5'
},
{
id: 5,
name: 'The Great Gatsby',
author: 'F. Scott Fitzgerald',
published: '1925',
genre: 'Historical Fiction',
rating: '3.9/5'
},
];
// The root provides a resolver function for each API endpoint
var root = {
// Get Book By ID
book: ({id}) => {
return bookArray.filter((book) => {
return book.id === id;
})[0];
},
// Get all books
books: () => {
return bookArray;
}
}
app.use('/graphql', graphqlHTTP({
schema: schema,
rootValue: root,
graphiql: true
}));
// Start Server
app.listen(4000, () => {
console.log('Server started on localhost:4000/graphql');
});