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Asked: 2026-06-04T02:37:56+00:00

I’ve monkey patched ActiveRecord in a Rails app that I work on, and I’m

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I’ve monkey patched ActiveRecord in a Rails app that I work on, and I’m trying to prepare to contribute a pull request. I’m currently getting stuck, trying to get the MySql tests run.

I’m using the provided test/config.yml file and have created a ‘rails’ user with no password. When I then try to run rake mysql:build_databases, I get…

ERROR 1044 (42000) at line 1: Access denied for user ''@'localhost' to database 'activerecord_unittest'
ERROR 1044 (42000) at line 1: Access denied for user ''@'localhost' to database 'activerecord_unittest2'

Any idea how to resolve this?

== EDIT

I added a puts to the Rakefile to see what it was trying to execute, and got…

mysql --user=rails -e "create DATABASE activerecord_unittest DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_unicode_ci "

… which looks fine. Executing that manually, I get the same error. Apparently, the –user option is being ignored. I ran mysql --help, and it looks like --user is the correct option to be passing.

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  1. Editorial Team

    I’ve managed to get it working now.

    The error message is very misleading. Actually, the correct username was being sent, but the user did not exist because I did not create it properly, resulting in the error.

    Specifying a username of ‘rails’ results in a connection as 'rails'@'localhost', so the username that must be created is 'rails'@'localhost', not 'rails'. I think I knew this a long time ago, but now I’ve been working with PostgreSQL for a long time, so had forgotten.

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