I'm trying implement TypeORM with MongoDB using repositories. However, when I try to make use of repositories to manage the database, using the same structure as in this repository, things go a bit sideways. I'm getting the following error:
UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'prototype' of undefined
I have tried the following code:
import { Request, Response } from 'express';
import { getMongoRepository } from "typeorm";
import Task from "../models/Task";
export default class TasksController {
async listAll(request: Request, response: Response): Promise<Response> {
const tasksRepository = getMongoRepository(Task);
try {
const tasks = await tasksRepository.find();
return response.status(200).json({ "items": tasks });
} catch (err) {
return response.status(400).json({
message: err.message,
});
}
}
}
I know the error refers to implementing the .find() method. I have even managed to fetch the data, using a suggestion from this post replacing:
const tasks = await tasksRepository.find();
with
const tasks = await tasksRepository.createCursor(tasksRepository.find()).toArray();
but I still get the above mentioned error.
Anyone understands what's going on?
I have also managed to save data directly to the database through the use of the following script:
server.ts
import express from 'express';
import { createConnection } from 'typeorm'
const app = express();
const port = 3333;
createConnection();
app.use(express.json());
app.post('/tasks', (async (request, response) => {
const { item } = request.body;
task.item = item;
const task = new Task();
(await connection).mongoManager.save(task);
return response.send(task);
}))
app.listen(port, () =>
console.log(`Server running on port ${port}`)
);
TypeORM is not support mongodb v4.
https://github.com/nestjs/nest/issues/7798
You can use 3.7.0 instead.
I submitted a pull requests to resolve this. https://github.com/typeorm/typeorm/pull/8412 if anyone is looking for a workaround in the meantime.
Related
I'm trying to build an API with express and pg. Whenever I try to access an endpoint that is related to a query to the database I get the error above.
My handler function is as follows:
import { Request, Response, Router, NextFunction } from 'express';
import { Orders } from '../models/order';
const orders = new Orders;
const index = async (_req: Request, res: Response, next: NextFunction) => {
try {
const ordersList = await orders.index();
res.json(ordersList);
} catch (err) {
next(err)
}
}
const ordersRoute = Router();
ordersRoute.get('/', index);
This handler refers to the following model:
import { Pool } from 'pg';
client = new Pool({
host: POSTGRES_HOST,
database: POSTGRES_DB,
user: POSTGRES_USER,
password: POSTGRES_PASSWORD,
port: parseInt(POSTGRES_PORT as string, 10)
export class Orders {
async index(): Promise<Order[]> {
try {
const conn = await client.connect();
const sql = 'SELECT * FROM orders';
const result = await conn.query(sql);
conn.release();
return result.rows;
} catch (err) {
throw new Error(`Cannot get orders: ${err}`);
}
}
}
anytime I try to access the endpoint I get
Error: Cannot get orders: TypeError: Cannot read properties of
undefined (reading 'connect')
in the console.
any idea how to fix ?
So how things work in your case.
All modules are read by nodejs starting from your index one by one from top to bottom.
In your script, you declare client and then export a class. In that case, your client is setup, then you export a class, and that file is completed, meaning that the only thing that remains is the exported thing. So when you try to use the exported class, you'll not have the same context as in your module.
You need to export the client too and import it where you need that class or to include client definition inside the class
I have a web application using a front end of React and a backend of Node.js (connecting to a MS SQL database.)
In the application, on each page load, the frontend sends a few requests (via Axios) to the API backend on the server. Most of the time (95%) they all process flawlessly, but maybe 5% of the time, it results in an "Aborted" message and the application server returns a 500 error. Sometimes these requests are very small amounts of data (like a count query with only a few numbers returned, much less than 1KB - so size isn't the problem).
It seems that somehow the browser is telling the server "oh, actually I need this" and the server cancels it's previous results and works on the next request. But most of the time they all get returned.
Here's a sample of the React context:
import React, { useCallback, createContext } from 'react'
import axios from 'axios'
import { useSnackbar } from 'notistack'
export const PlanContext = createContext()
export default function PlanProvider(props) {
const { enqueueSnackbar } = useSnackbar()
const [sampleData, setSampleData] = useState([])
const sampleRequest = useCallback(
async (dateInput) => {
try {
const { data } = await axios.get(`/api/sample`, {
params: { dateInput: dateInput, },
})
setSampleData(data)
} catch (error) {
enqueueSnackbar(`Error: ${error.message}`, { variant: 'error' })
}
}, [enqueueSnackbar])
return (
<Plan.Provider
value={{
sampleRequest,
sampleData,
}}
>
{props.children}
</Plan.Provider>
)
}
And here's a sample of the Node.JS Controller:
const sql = require('mssql')
const config = require('../config/db')
async function sampleRequest(req, res) {
const { dateInput } = req.query
let pool
try {
pool = await sql.connect(config)
const {recordset} = await pool.request()
.input('dateInput', sql.Date, dateInput).query`
SELECT * FROM DATATABLE WHERE StatusDate = #dateInput
`
res.json(recordset)
} catch (error) {
console.log('ERROR: ', error.message, new Date())
res.status(500).json({message: error.message})
} finally {
if (pool) {
try {
await pool.close()
} catch (err) {
console.error("Error closing connection: ",err);
}
}
}
}
module.exports = {
sampleRequest
}
And there's multiple contexts and multiple controllers pulling various pieces of data.
And here's an example of the error logged on the Node.JS server:
And in the Browser console (Chrome Developer Tools):
Is there something I have mixed up with the async / await setup? I can usually re-create the error after a bit by continually refreshing the page (F5).
For those looking for the answer , I had a similar problem and I believe it is because you are opening and closing the connection pool on every request or call of your function. Instantiate the connection pool outside of the function then call pool.request(). Common practice I've seen is to have the connection pool in your db file and export the pool object and then require it in your routes.
I have a Nodejs, Express server that uses Mongodb as the Database. I am trying to write some tests but I cannot get it configured properly. I need to create a mongoose connection for each block ( .test.ts file) once and then clean up the db for the other tests. Depending on how I approach this I get two different behaviours. But first my setup.
user.controller.test.ts
import { suite, test, expect } from "../utils/index";
import expressLoader from "#/loaders/express";
import { Logger } from "winston";
import express from "express";
import request from "supertest";
import { UserAccountModel } from "#/models/UserAccount";
import setup from "../setup";
setup();
import { app } from "#/server";
let loggerMock: Logger;
describe("POST /api/user/account/", function () {
it("it should have status code 200 and create an user account", async function () {
//GIVEN
const userCreateRequest = {
email: "test#gmail.com",
userId: "testUserId",
};
//WHEN
await request(app)
.post("/api/user/account/")
.send(userCreateRequest)
.expect(200);
//SHOULD
const cnt: number = await UserAccountModel.count();
expect(cnt).to.equal(1);
});
});
And my other test post.repository.test.ts
import { suite, test, expect } from "../../utils/index";
import { PostModel } from "#/models/Posts/Post";
import PostRepository from "#/repositories/posts.repository";
import { PostType } from "#/interfaces/Posts";
import { Logger } from "winston";
#suite
class PostRepositoryTests {
private loggerMock: Logger;
private SUT: PostRepository = new PostRepository({});
#test async "Should create two posts"() {
//GIVEN
const given = {
id: "jobId123",
};
//WHEN
await this.SUT.CreatePost(given);
//SHOULD
const cnt: number = await PostModel.count();
expect(cnt).to.equal(1);
}
}
And my setup
setup.ts
import { MongoMemoryServer } from "mongodb-memory-server";
import mongoose from "mongoose";
export = () => {
let mongoServer: MongoMemoryServer;
before(function () {
console.log("Before");
return MongoMemoryServer.create().then(function (mServer) {
mongoServer = mServer;
const mongoUri = mongoServer.getUri();
return mongoose.connect(mongoUri);
});
});
after(function () {
console.log("After");
return mongoose.disconnect().then(function () {
return mongoServer.stop(true);
});
});
};
With the above setup I get
1) "before all" hook in "{root}":
MongooseError: Can't call `openUri()` on an active connection with different connection strings. Make sure you aren't calling `mongoose.connect()` multiple times. See: https://mongoosejs.com/docs/connections.html#multiple_connections
But if I don't import the setup.ts and I rename it to setup.test.ts, then it works but the data isn't cleared after each run so I actually have 10 new users created instead of 1. Every time I run it, it works and doesn't clear the data after it's finished.
Also I have a big issue where the tests hang and don't seem to finish. I am guessing that is because of the async, await in the tests or because of the hooks hanging.
What I want to happen is:
Each test should have it's own setup, the mongo memory server should be clean every time.
The tests should use async and await and not hang.
Somehow export the setup from 1) as a utility function so that I can reuse it in my code
I'm trying to run next build when using getStaticProps and getStaticPaths method in one of my routes, but it fails every time. Firstly, it just couldn't connect to my API (which is obvious, they're created using Next.js' API routes which are not available when not running a Next.js app). I thought that maybe running a development server in the background would help. It did, but generated another problems, like these:
Error: Cannot find module for page: /reader/[id]
Error: Cannot find module for page: /
> Build error occurred
Error: Export encountered errors on following paths:
/
/reader/1
Dunno why. Here's the code of /reader/[id]:
const Reader = ({ reader }) => {
const router = useRouter();
return (
<Layout>
<pre>{JSON.stringify(reader, null, 2)}</pre>
</Layout>
);
};
export async function getStaticPaths() {
const response = await fetch("http://localhost:3000/api/readers");
const result: IReader[] = await response.json();
const paths = result.map((result) => ({
params: { id: result.id.toString() },
}));
return {
paths,
fallback: false,
};
}
export async function getStaticProps({ params }) {
const res = await fetch("http://localhost:3000/api/readers/" + params.id);
const result = await res.json();
return { props: { reader: result } };
}
export default Reader;
Nothing special. Code I literally rewritten from the docs and adapted for my site.
And here's the /api/readers/[id] handler.
export default async function handler(
req: NextApiRequest,
res: NextApiResponse
) {
const knex = getKnex();
const { id } = req.query;
switch (req.method) {
case "GET":
try {
const reader = await knex
.select("*")
.from("readers")
.where("id", id)
.first();
res.status(200).json(reader);
} catch {
res.status(500).end();
}
break;
}
}
Nothing special either. So why is it crashing every time I try to build my app? Thanks for any help in advance.
You should not fetch an internal API route from getStaticProps — instead, you can write the fetch code present in API route directly in getStaticProps.
https://nextjs.org/docs/basic-features/data-fetching#write-server-side-code-directly
I am using apollo-server-express for graphql back-end. I am going to process only mutations there, but I want to redirect query and subscription on hasura by means of schema stitching with introspection. Queries through apollo-server to hasura are working fine and returning the expected data.
But subscriptions are not working and I am getting this error: " Expected Iterable, but did not find one for field subscription_root.users".
And besides, server hasura is receiving events:
But apollo-server resents the answer from hasura. It is not the first day I suffer with this and I can not understand what the problem is.
In the editor hasura subscriptions work.
Link to full code
If you need any additional info, I will gladly provide it to you.
import {
introspectSchema,
makeExecutableSchema,
makeRemoteExecutableSchema,
mergeSchemas,
transformSchema,
FilterRootFields
} from 'graphql-tools';
import { HttpLink } from 'apollo-link-http';
import nodeFetch from 'node-fetch';
import { resolvers } from './resolvers';
import { hasRoleResolver } from './directives';
import { typeDefs } from './types';
import { WebSocketLink } from 'apollo-link-ws';
import { split } from 'apollo-link';
import { getMainDefinition } from 'apollo-utilities';
import { SubscriptionClient } from 'subscriptions-transport-ws';
import * as ws from 'ws';
import { OperationTypeNode } from 'graphql';
interface IDefinitionsParams {
operation?: OperationTypeNode,
kind: 'OperationDefinition' | 'FragmentDefinition'
}
const wsurl = 'ws://graphql-engine:8080/v1alpha1/graphql';
const getWsClient = function (wsurl: string) {
const client = new SubscriptionClient(wsurl, {
reconnect: true,
lazy: true
}, ws);
return client;
};
const wsLink = new WebSocketLink(getWsClient(wsurl));
const createRemoteSchema = async () => {
const httpLink = new HttpLink({
uri: 'http://graphql-engine:8080/v1alpha1/graphql',
fetch: (nodeFetch as any)
});
const link = split(
({ query }) => {
const { kind, operation }: IDefinitionsParams = getMainDefinition(query);
console.log('kind = ', kind, 'operation = ', operation);
return kind === 'OperationDefinition' && operation === 'subscription';
},
wsLink,
httpLink,
);
const remoteSchema = await introspectSchema(link);
const remoteExecutableSchema = makeRemoteExecutableSchema({
link,
schema: remoteSchema
});
const renamedSchema = transformSchema(
remoteExecutableSchema,
[
new FilterRootFields((operation, fieldName) => {
return (operation === 'Mutation') ? false : true; // && fieldName === 'password'
})
]
);
return renamedSchema;
};
export const createNewSchema = async () => {
const hasuraExecutableSchema = await createRemoteSchema();
const apolloSchema = makeExecutableSchema({
typeDefs,
resolvers,
directiveResolvers: {
hasRole: hasRoleResolver
}
});
return mergeSchemas({
schemas: [
hasuraExecutableSchema,
apolloSchema
]
});
};
Fixed by installing graphql-tools 4th version. It tutns out the editor did not even notice that I do not have this dependency and simply took the version of node_modules, which was installed by some other package. Problem was with version 3.x. Pull request is where the bug was fixed.
I had the same problem, different cause and solution.
My subscription was working well, until I introduced the 'resolve' key in
my subscription resolver:
Here is the 'Subscription' part of My resolver:
Subscription: {
mySubName: {
resolve: (payload) => {
console.log('In mySubName resolver, payload:',payload)
return payload;
},
subscribe:() => pubSub.asyncIterator(['requestsIncomplete']),
// )
},
The console.log proved the resolve() function was being called with a well structured payload (shaped the same as my Schema definiton - specifically the an object with a key named after the graphQL Subscriber, pointing to an array (array is an iterable):
In mySubName resolver, payload: { mySubName:
[ { id: 41,
...,
},
{...},
{...}
...
...
]
Even though I was returning that same unadulterated object, it caused the error expected Iterable, but did not find one for field "Subscription.mySubName"
When I commented out that resolve function all together, the subscription worked, which is further evidence that my payload was well structured, with the right key pointing to an iterable.
I must be mis-using the resolve field. From https://www.apollographql.com/docs/graphql-subscriptions/subscriptions-to-schema/
When using subscribe field, it's also possible to manipulate the event
payload before running it through the GraphQL execution engine.
Add resolve method near your subscribe and change the payload as you wish
so I am not sure how to properly use that function, specifically don't know what shape object to return from it, but using it as above breaks the subscription in the same manner you describe in your question.
I was already using graphql-tools 4.0.0, I upgraded to 4.0.8 but it made no difference.