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I am new to ruby on rails hence when i am trying to create new project by following command: rails new abc I am getting following error

rails aborted! Psych::BadAlias: Unknown alias: default /home/iftikhar/Desktop/abc/bin/rails:9:in <top (required)>' /home/iftikhar/Desktop/abc/bin/spring:15:in require' /home/iftikhar/Desktop/abc/bin/spring:15:in <top (required)>' ./bin/rails:3:in load' ./bin/rails:3:in `' Tasks: TOP => app:template (See full trace by running task with --trace)

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  • What version of Ruby (ruby -v) and Rails (rails -v) do you use? Commented Jan 24, 2022 at 18:28
  • ruby 3.1.0 rails 6.0.4.4 Commented Jan 24, 2022 at 18:29
  • You should edit the question properly! If it's code, for example, you can select once you have pasted it, and press 'ctrl+k'. Commented Feb 4, 2022 at 9:50

2 Answers 2

Reset to default
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According to this page Rails 6.0 is not compatible with Ruby 3.1. This makes sense because Ruby 3.1 was released just a couple of days ago but Rails 6.0.4.4 was released more than a year ago and was the last release of Rails 6.0 since then. Furthermore, it is worth noting that Rails 6.0 is not actively maintained anymore.

I suggest using the latest Ruby on Rails (7.0.1) version when you want to start a new project. Or if you really need to work with Rails 6.0 (what I would not recommend) then you will need to downgrade Ruby to 2.7.5

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Thanks alot, by upgrading to rails latest version my problem has been solved for now
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Within config/database.yml rename default: to x-default:.

https://stackoverflow.com/a/71944400/2675670

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