To suppress warnings like:
warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
For now, simply prefix/pass the RUBYOPT environment variable to your rails commands:
RUBYOPT='-W:no-deprecated -W:no-experimental' rails server
or
RUBYOPT='-W:no-deprecated -W:no-experimental' rails db:migrate
This may not work with earlier versions of ruby.
For backward compatibility with earlier versions of ruby prefix it with RUBYOPT='-W0' instead.
example:
RUBYOPT='-W0' bundle exec rspec
If you don’t want to prefix this each time you run a command, then simply add this to the last line of your .zshrc or .bashrc (whatever you’re using):
export RUBYOPT='-W:no-deprecated -W:no-experimental'
or
export RUBYOPT='-W0'
Also see last point of the notes here:
https://rubyreferences.github.io/rubychanges/2.7.html#warning-and-