How to fix Rails's warning messages with Ruby 2.7.0

Question

Did anyone resolve this issue with Ruby 2.7.0?

I used rbenv and installed Ruby v2.7.0 and then created a Rails project using Rails v6.0.2

Answer 1

Obviously it will take some time to for ruby team to remove all this warning in next ruby version. For now the command in your terminal

`RUBYOPT='-W:no-deprecated' rails s` 

on my basic, plain new rails 6.0.2.1 && ruby 2.7.0 project remove these two warnings lines above in a question.

Also, with command

RUBYOPT='-W:no-experimental' rails s

you will hide warnings about experimental features.

You can combine these two in one command like:

RUBYOPT='-W:no-deprecated -W:no-experimental' rails s

However, I tried these commands inside my old project built with rails 5.2 and ruby 2.6.4 later upgraded to rails 6.0.1 and they didn't worked well on for all warnings messages I got from different rails Active* modules and ruby gems.

Probably we will need some time for upgrading code and gems for new latest stuff.