relations_app

An application with many hasMany and belongsTo relations

Trying to provoke the Node.js warning described in throws MaxListenersExceededWarning loopbackio/loopback-next#2198

There is a hasMany relationship between Customer1 and Order1. There is a belongsTo relationship between Order1 and Customer1.

I used a custom program to generate the same relationships (and all required files) between CustomerN and OrderN ; where N=2 through 35.

docker

I used a postgres docker image.

https://hub.docker.com/_/postgres

docker pull postgres

docker run --name my-postgres -e POSTGRES_PASSWORD=mysecretpassword -d -p 5432:5432 postgres

The datasource /relations_app/src/datasources/my-postgresql.datasource.json contains the appropriate connection values as well.

Setup

npm install
npm start

You should see:

Server is running at http://[::1]:3000
Try http://[::1]:3000/ping

Steps

I performed a POST with

{ "id": 1, "name": "Dom1" }

to all

http://[::1]:3000/customers1 through http://[::1]:3000/customers35

without seeing the warning.

I then performed a GET to all

http://[::1]:3000/customers1 through http://[::1]:3000/customers35

without seeing the warning.