PG::ConnectionBad - could not connect to server: Connection refused on Mac OS X - ruby-on-rails

Question

After installing the needed ruby version with: rvm install 2.7.1 and installing all the gems,
I was planning to create the db with rails db:create but I am getting this error:
could not connect to server: Connection refused
Is the server running on host "127.0.0.1" and accepting
TCP/IP connections on port 5442?
Couldn't create 'development' database. Please check the configuration.
rails aborted!
PG::ConnectionBad: could not connect to server: Connection refused
Is the server running on host "127.0.0.1" and accepting
TCP/IP connections on port 5442?
My database.yml
default: &default
adapter: postgresql
pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 15 } %>
host: <%= ENV.fetch("DATABASE_HOST") { '127.0.0.1' } %>
development:
<<: *default
database: development
test:
<<: *default
database: test
production:
<<: *default
database: production
Seems that it's related to postgres.
It's version is: postgres (postgreSQL) 12.4
pg gem version is 1.2.3
Restarting the postgresql didn't helped

Answer 1

It appeared that I needed to create a new PostgreSQL database cluster.
First you need to remove the postgres dir in the /usr/local/var/
you can use this code - cd /usr/local/var/ && rm -rf postgres
after that - create the new postgres folder mkdir postgres (inside /usr/local/var)
and initialise the creation of the new PostgreSQL database cluster with -
cd && initdb --locale=C -E UTF-8 /usr/local/var/postgres
The last thing, restart the postgres - brew services restart postgresql