Thing you want to do

I want to create a new app by specifying the Rails version

Development environment

Windows10
AWS Cloud9

Background of the problem

When learning the teaching materials, an error occurred because the version of Rails (-v6) previously installed in Cloud9 and the version of the teaching materials (-v5) were different, and the learning sometimes got stuck. ** I wanted to avoid errors caused by different versions and learn. ** **

Solutions

Install the same Rails version (-v5) as the teaching material
Specify the same Rails version (-v5) as the teaching material when creating an app with rails new 〇〇

I did it with the following command.
cd ~/environment gem install rails -v 5 rails _5_ new ○○

Now, even if Rails (-v6) is installed, you can create a new XX application with Rails (-v5).

Solution keywords

You can install rails by specifying version △ with the gem install rails -v △ command. When creating an application by specifying the version, create it with the rails _ △ _ new command.

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