How to disable prepared statement in heroku with postgres database

Question

I fixed an issue on my rails project locally (with postgres config) while adding in database.yml this statement:

test:
  prepared_statements: false

Answer 1

You should just be able to add ?prepared_statements=false to the existing database url and restart your dynos. This worked for us.

heroku config:add DATABASE_URL=[old database url here]?prepared_statements=false

To check that it's set after restarting your server you can open a console and query ActiveRecord::Base.connection_config.