I am trying to setup an integration test for apollo graphql and need to connect to my mongodb database but this doesnt seem to be working. See the below code:
const MongoClient = require('mongodb').MongoClient
const LOADER_URI = 'mongodb://localhost:27017'
describe('ApolloIntegrationTest', () => {
test('Test', () => {
MongoClient.connect(URI, (err, client) => {
if(err) throw err
const pulseCore = client.db('pulse-core')
console.log(pulseCore)
const books = pulseCore.collection('books')
console.log(books)
client.close()
})
})
});
When i run the test, i expected to see the console logs printing but nothing prints when the test finishes. Not sure what i am doing wrong here.
You can use beforeAll and afterAll to simplify this.
const MongoClient = require('mongodb').MongoClient;
const LOADER_URI = 'mongodb://localhost:27017'
describe('ApolloIntegrationTest', () => {
let connection;
beforeAll(async () => {
connection = await MongoClient.connect(LOADER_URI);
});
afterAll(async () => {
await connection.close();
});
test('Test', async () => {
const pulseCore = await connection.db('pulse-core');
console.log(pulseCore);
const books = pulseCore.collection('books');
console.log(books);
});
});
Related
I am really new to the industry and have this error when trying to check the database connection via API reuests with postman..... Please help me to settle this issue...
I just want to check the mongodb database by sendng API requests. Still I cannot identify the error and I am following a set of tutorials and occure this issue... Anyone can help me to identify the mistake it's highly appreciated....
{ this is dummy text to avoid please add more details...
Here is my code...
const app = express();
const { MongoClient } = require('mongodb');
const PORT = process.env.PORT || 8000;
// Initialize middleware
// we used to install body parser but now it's a built in middleware
// Function of express. It parses incoming JSONpayload
// app.use(express.json({extended:false}));
app.use(express.json({ extended: false }));
// Test Routs
// app.get("/", (req,res)=>res.send("Hello Aruna !!!"));
// app.post("/", (req,res)=>res.send(`Hello ${req.body.name} `));
// app.get("/hello/:name", (req.res)=>res.send(`Hello ${req.params.name}`))
app.get('/api/articles/:name', async (req, res) => {
try {
const articleName = req.params.name;
const client = await MongoClient.connect('mongodb://localhost:27017');
const db = client.db('mernblog');
const articlesinfo = db
.collection('articles')
.findOne({ name: articleName });
res.status(200).jason(articlesinfo);
client.close();
} catch (error) {
res.status(500).jason({ message: 'Error connecting to database', error });
}
});
app.post('/api/articles/:name/add-comments', (req, res) => {
const { username, text } = req.body;
const articleName = req.params.name;
articlesinfo[articleName].comments.push({ username, text });
res.status(200).send(articlesinfo[articleName]);
});
app.post('/', (req, res) => res.send(`Hello ${req.body.name}`));
app.get('/hello/:name', (req, res) => res.send(`Hello ${req.params.name}`));
app.listen(PORT, () => console.log(`Server is running at port ${PORT}`));
Server.js
Terminal
Error and API request in Postman
You have a typo in your code: jason should be json.
Other tips, you should handle your DB connection in a separate method and change your post request since articlesinfo is not a global variable:
const app = express();
const { MongoClient } = require('mongodb');
const PORT = process.env.PORT || 8000;
const client = new MongoClient('mongodb://localhost:27017');
const connectDB = async () => {
try {
await client.connect();
console.log('Successfully connected to DB')
} catch (err) {
await client.close();
console.log('Error connecting to DB');
process.exit(1);
}
}
// Initialize middleware
// we used to install body parser but now it's a built in middleware
// Function of express. It parses incoming JSONpayload
// app.use(express.json({extended:false}));
app.use(express.json({ extended: false }));
// Test Routs
// app.get("/", (req,res)=>res.send("Hello Aruna !!!"));
// app.post("/", (req,res)=>res.send(`Hello ${req.body.name} `));
// app.get("/hello/:name", (req.res)=>res.send(`Hello ${req.params.name}`))
app.get('/api/articles/:name', async (req, res) => {
try {
const articleName = req.params.name;
const db = client.db('mernblog');
const articlesinfo = db
.collection('articles')
.findOne({ name: articleName });
res.status(200).json(articlesinfo);
client.close();
} catch (error) {
res.status(500).json({ message: 'Error connecting to database', error });
}
});
app.post('/api/articles/:name/add-comments', (req, res) => {
const { username, text } = req.body;
const articleName = req.params.name;
const db = client.db('mernblog');
const articlesinfo = db
.collection('articles')
.updateOne({ name: articleName }, { $push: { comments: { username, text } } });
res.status(200).send(articlesinfo);
});
app.post('/', (req, res) => res.send(`Hello ${req.body.name}`));
app.get('/hello/:name', (req, res) => res.send(`Hello ${req.params.name}`));
connectDB();
app.listen(PORT, () => console.log(`Server is running at port ${PORT}`));
I had the same issue with the below question, and the answer(adding setTimeout()) worked for me.
MongoRuntimeError: Connection pool closed
But I can't find more information about this issue on any other documents, Youtube video, or MongoDB Guide. All of them close the connection without setTimeout function. Am I missing something? or if there is a better way to close the connection. Please advise.
const { MongoClient } = require("mongodb");
const url =
"mongodb+srv://USERNAME:PASSWORD#cluster0.feify.mongodb.net/products_test?retryWrites=true&w=majority";
const createProduct = async (req, res, next) => {
const newProduct = {
name: req.body.name,
price: req.body.price,
};
const client = new MongoClient(url);
try {
await client.connect();
const db = client.db();
const result = db.collection("products").insertOne(newProduct);
} catch (error) {
return res.json({ message: "Could not store data." });
}
setTimeout(() => {
client.close();
}, 1500);
res.json(newProduct);
};
const getProducts = async (req, res, next) => {};
exports.createProduct = createProduct;
exports.getProducts = getProducts;
Thank you
You should await the insertOne function:
const { MongoClient } = require("mongodb");
const url =
"mongodb+srv://USERNAME:PASSWORD#cluster0.feify.mongodb.net/products_test?retryWrites=true&w=majority";
const createProduct = async (req, res, next) => {
const newProduct = {
name: req.body.name,
price: req.body.price,
};
const client = new MongoClient(url);
try {
await client.connect();
const db = client.db();
const collection = db.collection("products");
const result = await collection.insertOne(newProduct);
} catch (error) {
return res.json({ message: "Could not store data." });
}
client.close();
res.json(newProduct);
};
const getProducts = async (req, res, next) => {};
exports.createProduct = createProduct;
exports.getProducts = getProducts;
I'm trying to setup testing my node with mongo app using Jest. I've set it up and copied their sample verbatim, which works fine, except when I call the db.close(); function. It gives me a TypeError: that db.close is not a function. This is directly out of their example:
import { MongoClient } from 'mongodb';
describe('insert', () => {
let connection;
let db;
beforeAll(async () => {
connection = await MongoClient.connect(global.__MONGO_URI__, {
useNewUrlParser: true,
});
db = await connection.db(global.__MONGO_DB_NAME__);
});
afterAll(async () => {
await connection.close();
await db.close();
});
it('should insert a doc into collection', async () => {
const users = db.collection('users');
const mockUser = {_id: 'some-user-id', name: 'John'};
await users.insertOne(mockUser);
const insertedUser = await users.findOne({_id: 'some-user-id'});
expect(insertedUser).toEqual(mockUser);
});
});
I want to connect my Apollo server with my mongoDB. I know there are many examples out there, but I get stuck at the async part and did not found a solution or example for that (that's strange, am I completly wrong?)
I started with the example from next.js https://github.com/zeit/next.js/tree/master/examples/api-routes-apollo-server-and-client .
But the mongodb integration is missing.
My code
pages/api/graphql.js
import {ApolloServer} from 'apollo-server-micro';
import {schema} from '../../apollo/schema';
const apolloServer = new ApolloServer({schema});
export const config = {
api: {
bodyParser: false
}
};
export default apolloServer.createHandler({path: '/api/graphql'});
apollo/schema.js
import {makeExecutableSchema} from 'graphql-tools';
import {typeDefs} from './type-defs';
import {resolvers} from './resolvers';
export const schema = makeExecutableSchema({
typeDefs,
resolvers
});
apollo/resolvers.js
const Items = require('./connector').Items;
export const resolvers = {
Query: {
item: async (_parent, args) => {
const {id} = args;
const item = await Items.findOne(objectId(id));
return item;
},
...
}
}
apollo/connector.js
require('dotenv').config();
const MongoClient = require('mongodb').MongoClient;
const password = process.env.MONGO_PASSWORD;
const username = process.env.MONGO_USER;
const uri = `mongodb+srv://${username}:${password}#example.com`;
const client = await MongoClient.connect(uri);
const db = await client.db('databaseName')
const Items = db.collection('items')
module.exports = {Items}
So the problem is the await in connector.js. I have no idea how to call this in an async function or how to provide the MongoClient on an other way to the resolver. If I just remove the await, it returns – obviously – an pending promise and can't call the function .db('databaseName') on it.
Unfortunately, we're still a ways off from having top-level await.
You can delay running the rest of your code until the Promise resolves by putting it inside the then callback of the Promise.
async function getDb () {
const client = await MongoClient.connect(uri)
return client.db('databaseName')
}
getDb()
.then(db => {
const apollo = new ApolloServer({
schema,
context: { db },
})
apollo.listen()
})
.catch(e => {
// handle any errors
})
Alternatively, you can create your connection the first time you need it and just cache it:
let db
const apollo = new ApolloServer({
schema,
context: async () => {
if (!db) {
try {
const client = await MongoClient.connect(uri)
db = await client.db('databaseName')
catch (e) {
// handle any errors
}
}
return { db }
},
})
apollo.listen()
When making an async/await call to database from an express router to postgres db via massive.js instance, the correct response from db is received, but the router apparently returns before async function finishes; therefore, the test invocation returns undefined. From the console out (below), it seems clear that the async function is not waited for >_<
Is wrapping the router in order to pass the app instance causing the issue?
app.js
const app = express();
const massiveInstance = require("./db_connect");
const routes = require("./routes");
const PORT = 3001;
const server = massiveInstance.then(db => {
// Add db into our app object
app.set("db", db);
app.use("/api", routes(app));
app.listen(PORT, () => {
console.log("Server listening on " + PORT);
});
});
routes.js
const router = require("express").Router();
const { countRegions } = require("./db_queries");
const routes = app => {
const db = app.get("db");
router.get("/regions/count", async (request, response) => {
try {
const total = await countRegions(db);
console.log(`There are ${total} regions.`);
response.send(`There are ${total} regions.`);
} catch (err) {
console.error(err);
}
});
return router;
};
module.exports = routes;
db_queries.js
const countRegions = db => {
db.regions.count().then(total => {
console.log(`db has ${total} count for regions`);
return total;
});
};
module.exports = {
countRegions,
};
console output
Server listening on 3001
There are undefined regions.
db has 15 count for regions
You are not returning a promise returned by then in countRegions method.
So you should add return in your code like this
const countRegions = db => {
//here
return db.regions.count().then(total => {
console.log(`db has ${total} count for regions`);
return total;
});
};
or simply do,
return db.regions.count();