if ! zstyle -t ':prezto:module:rails:alias' skip; then
  alias ror='bundle exec rails'
  alias rorc='bundle exec rails console'
  alias rordc='bundle exec rails dbconsole'
  alias rordm='bundle exec rake db:migrate'
  alias rordM='bundle exec rake db:migrate db:test:clone'
  alias rordr='bundle exec rake db:rollback'
  alias rorg='bundle exec rails generate'
  alias rorl='tail -f "$(ruby-app-root)/log/development.log"'
  alias rorlc='bundle exec rake log:clear'
  alias rorp='bundle exec rails plugin'
  alias rorr='bundle exec rails runner'
  alias rors='bundle exec rails server'
  alias rorsd='bundle exec rails server --debugger'
  alias rorx='bundle exec rails destroy'
fi

https://github.com/sorin-ionescu/prezto/blob/7b3b798eb5038eb05938399f245fa643c630a7f1/modules/rails/init.zsh#L22