https://quicktasks.ismael.casimpan.com/tags/ruby-on-rails/Recent content in ruby-on-rails on IT QuicktasksHugo -- gohugo.ioCopyright © 2018–2022, Ismael Casimpan Jr.; All Rights ReservedTue, 15 Feb 2022 23:18:11 +0800https://quicktasks.ismael.casimpan.com/post/install-specific-ruby-version-via-rvm/Tue, 15 Feb 2022 23:18:11 +0800https://quicktasks.ismael.casimpan.com/post/install-specific-ruby-version-via-rvm/ Check list of known versions 1~$ rvm list known Install specific version 1~$ rvm install ruby-2.7.2 Check installed version 1~$ rvm list 2=* ruby-2.7.2 [ x86_64 ] 3ruby-3.0.0 [ x86_64 ] 45# => - current 6# =* - current && default 7# * - default Switch versions 1~$ rvm use ruby-3.0.0 2Using /home/user/.rvm/gems/ruby-3.0.0https://quicktasks.ismael.casimpan.com/post/install-ruby-on-rails/Tue, 15 Feb 2022 23:17:11 +0800https://quicktasks.ismael.casimpan.com/post/install-ruby-on-rails/ Install RVM + Rails Manage Ruby versions (production or not using RVM). Trust me, been there and installing it otherwise is not a walk in the park... 1~$ gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB 2~$ curl -sSL https://get.rvm.io | bash -s stable 3~$ curl -sSL https://get.rvm.io | bash -s stable --rails RVM Already Installed But Without Rails Make sure gem is installed under ~/.rvm. You should see something like below: 1~$ which gem 2/home/user/.https://quicktasks.ismael.casimpan.com/post/rails-error-gemnotfoundexception/Tue, 15 Feb 2022 11:17:11 +0800https://quicktasks.ismael.casimpan.com/post/rails-error-gemnotfoundexception/ You recently installed rails but since you're still learning, you did a lot of stuffs. One day, you got the following error: 1~$ rails --version 2Traceback (most recent call last): 32: from /usr/local/bin/rails:23:in `<main>' 41: from /usr/lib/ruby/2.7.0/rubygems.rb:294:in `activate_bin_path' 5/usr/lib/ruby/2.7.0/rubygems.rb:275:in `find_spec_for_exe': can't find gem railties (>= 0.a) with executable rails (Gem::GemNotFoundException) Probably, you forgot that you switched gemset? Check contents of your gemdir 1~$ cd `rvm gemdir` 2~$ pwd 3/home/user/.rvm/gems/ruby-2.7.2@newname 4~$ ll 5total 24 6drwxr-xr-x 5 user user 4096 Feb 16 11:54 .https://quicktasks.ismael.casimpan.com/post/uninstall-rvm/Tue, 15 Feb 2022 10:17:11 +0800https://quicktasks.ismael.casimpan.com/post/uninstall-rvm/ If you no longer wish to use RVM, you can uninstall it by first removing the script calls in your .bashrc file and then removing the RVM files. First, remove the script calls with a text editor like nano: 1~$ nano ~/.bashrc Scroll down to where you see the RVM lines of your ~/.bashrc file: 1... 2# Add RVM to PATH for scripting. Make sure this is the last PATH variable change.https://quicktasks.ismael.casimpan.com/post/install-ruby-and-rails-on-gemset/Tue, 15 Feb 2022 09:17:11 +0800https://quicktasks.ismael.casimpan.com/post/install-ruby-and-rails-on-gemset/ Gems Ruby applications or libraries. In Rails, you install gems so you would write less code. Creating Gemset To make it easy to manage, create gemset. Think of it as a group of libraries that you can switch to depending on situation. 1~$ rvm gemset list 23gemsets for ruby-2.7.0 (found in /home/user/.rvm/gems/ruby-2.7.0) 4=> (default) 5global 6learning_ror Check location of your gemset(s) 1~$ rvm gemdir 2/home/user/.rvm/gems/ruby-2.7.0 Switch gemset 1~$ rvm gemset use learning_ror 2Using ruby-2.https://quicktasks.ismael.casimpan.com/post/create-basic-rails-site/Tue, 15 Feb 2022 01:17:11 +0800https://quicktasks.ismael.casimpan.com/post/create-basic-rails-site/ For instance, we want to create a blog in rails, use the command: 1~$ rails new blog Start the server 1~$ cd blog 2~$ bin/rails server Access it in http://127.0.0.1:3000. See details in this link