ANSWERED (other noobs should read what I did):
Thanks to those who answered, but I think I know why it had still been defaulting to the system ruby earlier. I started a shell session and installed rbenv, then install ruby-build for rbenv, then install ruby 2.1.2 and ran rbenv global 2.1.2 Then I installed the new version of rails and tried to create a new rails project.
I think the mistake was just that I hadn't started a new shell session and so it defaulted to the rails location it had when the session started, which was with the system ruby. Stupid mistake. Blah.
ORIGINAL POST:
These are my rbenv versions
system
* 2.1.2 (set by /home/ab/.rbenv/version)
and this is what I get when I run
gem list -d rails
rails (4.2.0.beta1, 4.1.1)
Author: David Heinemeier Hansson
Homepage: http://www.rubyonrails.org
License: MIT
Installed at (4.2.0.beta1): /home/ab/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0
(4.1.1): /home/ab/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0
The Hartl tutorial online uses 4.2.0beta1, so I want to use that, but when I try to make a new rails project, it defaults to 4.1.1.
Somebody from this suggested a way to change a default rails version, but the command looks in the wrong location. See here
ab#abpc:~/Code/RailsTutorial$ rails _4.2.0beta1_ -v
/usr/lib/ruby/1.9.1/rubygems/dependency.rb:247:in `to_specs': Could not find railties (= 4.2.0beta1) amongst [actionmailer-4.1.1, actionpack-4.1.1, actionview-4.1.1, activemodel-4.1.1, activerecord-4.1.1, activesupport-4.1.1, arel-5.0.1.20140414130214, builder-3.2.2, bundler-1.3.5, coffee-rails-4.0.1, coffee-script-2.2.0, coffee-script-source-1.7.0, diff-lcs-1.2.5, erubis-2.7.0, execjs-2.1.0, hike-1.2.3, i18n-0.6.9, jbuilder-2.0.7, jquery-rails-3.1.0, json-1.8.1, libv8-3.16.14.3-x86_64-linux, mail-2.5.4, mime-types-1.25.1, mini_portile-0.6.0, minitest-5.3.4, multi_json-1.10.1, net-http-persistent-2.9, nokogiri-1.6.2.1, polyglot-0.3.5, rack-1.5.2, rack-protection-1.5.3, rack-test-0.6.2, rails-4.1.1, railties-4.1.1, rake-10.3.2, rdoc-4.1.1, rdoc-3.9.4, ref-1.0.5, rspec-2.14.1, rspec-core-2.14.8, rspec-expectations-2.14.5, rspec-mocks-2.14.6, rspec-rails-2.14.2, sass-3.2.19, sass-rails-4.0.3, sdoc-0.4.0, sinatra-1.4.5, spring-1.1.3, sprockets-2.11.0, sprockets-rails-2.1.3, sqlite3-1.3.9, therubyracer-0.12.1, thor-0.19.1, thor-0.18.1.20140116, thread_safe-0.3.4, tilt-1.4.1, treetop-1.4.15, turbolinks-2.2.2, tzinfo-1.2.0, uglifier-2.5.0, webrat-0.7.3] (Gem::LoadError)
from /usr/lib/ruby/1.9.1/rubygems/dependency.rb:256:in `to_spec'
from /usr/lib/ruby/1.9.1/rubygems.rb:1231:in `gem'
from /usr/local/bin/rails:22:in `<main>'
I'm still far from as knowledgeable as I'd like to be, but I can see that "rails" is defaulting to usr/lib/bin/rails and I need to reroute it to ~/.rbenv/versions/2.1.2/lib/ or somewhere around there... not entirely sure where, and I don't know how to get it to do that. Help?
It looks like you are using your system ruby v1.9.1 which is not compatible with rails 4 at all (Rails 4 requires 1.9.3 or higher).
So first you need to set your ruby version using rbenv global 2.1.2 to set it system-wide or rbenv local 2.1.2 if you just want it for this project. I'm not sure if your system will then default to rails-4.1.1 or the newer beta but you can try rails -v to find out. If not, rails _4.2.0.beta1_ new myapp should work.
The Hartl tutorial online uses 4.2.0beta1
Here is what I am seeing:
Install Rails
Once you’ve installed RubyGems, installing Rails should be easy. This
tutorial standardizes on Rails 4.0, which we can install as follows:
$ gem install rails --version 4.0.8
...
but when I try to make a new rails project, it defaults to 4.1.1.
Gemfile:
source 'https://rubygems.org'
ruby '2.0.0'
#ruby-gemset=sample_app2_gems
gem 'rails', '4.0.8'
...
Set the version of rails you want to use in your Gemfile.
Related
Thank you this community for getting me started on the right path. Specifying rails version to use when creating a new application gets me close, but the differing ruby version is what is throwing me off. I'm running into an error after running rails new that I'm not sure where to begin to resolve it. I gather from the error that my command is missing a parameter, but I can't determine what it is.
Any advice?
I would like to create a rails 5.2.6 project and I'm finding consistent responses elsewhere indicating that my approach to getting a rails project created with a specific version is to:
install the rails gem with gem install rails -v 5.2.6
create a new rails project, specifying the rails version with rails _5.2.6 new appName
I think I'm on to it. Did a specific google search for compatibility of Ruby 3 with Rails 5 and appears this is the likely problem.
I've now run 'rvm install 2.7.4' then 'rvm use 2.7.4' but still seems to be using ruby 3 in the command. The new error:
user#ubuntudev:~/railsprojects$ rails _5.2.6_ new rpapitest
/home/user/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems.rb:281:in `find_spec_for_exe': can't find gem railties (= 5.2.6) with executable rails (Gem::GemNotFoundException)
from /home/user/.rbenv/versions/3.0.0/lib/ruby/3.0.0/rubygems.rb:300:in `activate_bin_path'
from /home/user/.rbenv/versions/3.0.0/bin/rails:23:in `<main>'
Try with rbenv global 2.7.4 if you have rbenv installed
The Ruby on Rails Tutorial by Michael Hartl uses a Gemfile without specifying a Ruby version: the ruby keyword is missing in all the applications.
When I deploy to Heroku I receive the following warning:
remote: ###### WARNING:
remote: You have not declared a Ruby version in your Gemfile.
remote: To set your Ruby version add this line to your Gemfile:
remote: ruby '2.2.4'
remote: # See https://devcenter.heroku.com/articles/ruby-versions for more information.
The tutorial says that "the costs associated with including such an explicit Ruby version number outweigh the (negligible) benefits, so you should ignore this warning for now. The main issue is that keeping your sample app and system in sync with the latest Ruby version can be a huge inconvenience".
I am wondering whether the alternative is to keep the pace with the Ruby version at Heroku (presumably 2.2.4 at present), as the book seems to suggest, or also to specify any Ruby version it suits me. In other words, since I am using Ruby 2.2.1p85 for my application, adding ruby "2.2.1", :patchlevel => "85" would work and make Heroku adjust to this version or rather I am supposed to adjust to Heroku and add as suggested ruby '2.2.4'?
I am using rvm and a specific gemset with a specific Ruby version, for no other reason than trying to use an environment as much close to the tutorial as possible. What is the best practice in a real context? Would you suggest to use the last Ruby version and include it in the Gemfile? Can the Gemfile leave out the Ruby version with no worries?
Please follow the steps to solve
You can check which ruby version is associate with your app by command
heroku run "ruby -v"
It is good to have default version of ruby which is 2.2.4 in order to solve your problem. If your ruby version is older than 2.2.4 then please upgrade it.
after checking/upgrading version You can use the ruby keyword in your app’s Gemfile to specify a particular version of Ruby.
source "https://rubygems.org"
ruby "2.2.4"
You will need to install and update bundler again
$ gem install bundler
$ bundle update
This command:
heroku run rake db:migrate
solved same problem
I am trying to teach myself ruby on rails and I when I tried to access my server using Terminal on my Mac this is what I got back:
rails server /Library/Ruby/Site/1.8/rubygems/dependency.rb:247:in
to_specs': Could not find railties (>= 0) amongst [bundler-1.0.22,
rake-0.9.2] (Gem::LoadError) from
/Library/Ruby/Site/1.8/rubygems/dependency.rb:256:into_spec' from
/Library/Ruby/Site/1.8/rubygems.rb:1208:in `gem' from
/usr/bin/rails:18
Any thoughts on this?
Try typing "bundle exec rails server" to ensure that the proper gems are being loaded.
Also you'll probably want to be using Ruby 1.9.x for new Rails apps. Since you're using OS X I suggest https://github.com/sstephenson/ruby-build to build the latest version of Ruby. You can use it in conjunction with rbenv which will help you manage having two versions of Ruby on the same system.
If you do decide to use rbenv you'll want to type "gem uninstall bundler" and then reinstall it after you install rbenv so that the gem bin is in the right place. As stated above, you'll want to use "bundle exec" before any rails or rake command to make sure the proper environment is loaded.
I am trying to set my machine up so I can follow this tutorial: the intro to rails screen-cast i wish i had.
I keep running into issues, most recently the following:
C:/Ruby192/lib/ruby/gems/1.9.1/gems/ansi-1.4.1/lib/ansi/code.rb:5:in `require':
no such file to load -- Win32/Console/ANSI (LoadError)
This occurs when ever I run rails g. (I would like to see if my r spec generator has been added.)
Environment details: Windows 7, ruby 1.9.2p290, rails 3.1.1, rubygems 1.8.15
After you installed "gem install win32console", can you add this gem into your Gemfile file and try to run bundle install again?
Gemfile
gem "win32console", "~> 1.3.0"
RailsInstaller may be your best bet if you're looking for an integrated Windows Rails experience.
It's up-to-date (-ish, doesn't use Ruby 1.9.3) with:
Ruby 1.9.2-p290
Rails 3.1.1
Git 1.7.6
and other useful bits.
The latest version of rails installed on my mac is 3.0.0.beta
gem list returns
rails (3.0.0.beta, 2.3.5, 2.3.4, 2.3.2, 2.2.2, 1.2.6)
I want to create a new project using version 2.3.5
So I run: rails _2.3.5_ myProject
But it returns the following error
$ rails _2.3.5_ photosbackup
/Library/Ruby/Site/1.8/rubygems.rb:777:in `report_activate_error': RubyGem version error: railties(3.0.0.beta not = 2.3.5) (Gem::LoadError)
from /Library/Ruby/Site/1.8/rubygems.rb:211:in `activate'
from /Library/Ruby/Site/1.8/rubygems.rb:1056:in `gem'
from /usr/bin/rails:18
Any idea how I can create a new project using version 2.3.5?
Thanks
I think you can just uninstall the previous Rails versions.
Which can be problematic - I have a number of Rails 2.3.5 (and earlier) apps in production that require maintenance and won't be upgraded to the new version.
So what I recommend in this situation is having a look at RVM - it lets you install and manage multiple versions of Ruby, and provides isolation between sets of Gems. I now run a Ruby 1.9.1 with Rails 3 and friends in isolation from my default system settings which let me do my day to day work.
even i had the same problem but the following command worked for me
rails 2.3.5 new myProject