Rails + Postgres drop error: database is being accessed by other users

Question

I have a rails application running over Postgres.

I have two servers: one for testing and the other for production.

Very often I need to clone the production

Answer 1

I had this same issue when working with a Rails 5.2 application and PostgreSQL database in production.

Here's how I solved it:

First, log out every connection to the database server on the PGAdmin Client if any.

Stop every session using the database from the terminal.

sudo kill -9 `ps -u postgres -o pid=`

Start the PostgreSQL server, since the kill operation above stopped the PostgreSQL server.

sudo systemctl start postgresql

Drop the database in the production environment appending the production arguments.

rails db:drop RAILS_ENV=production DISABLE_DATABASE_ENVIRONMENT_CHECK=1

That's all.

I hope this helps