Upgrading to Ruby on Rails 5.0 from Rails 4.2 – application use case

It may also be possible to upgrade higher according to this post:

[http://blog.lucascaton.com.br/index.php/2014/02/28/have-a-rails-2-app-you-can-run-it-on-the-newest-ruby/](http://blog.lucascaton.com.br/index.php/2014/02/28/have-a-rails-2-app-you...

When running bundle install you get the following error:

Could not verify the SSL certificate for https://rubygems.org/.
There is a chance you are experiencing a man-in-the-middle attack, but most likely your system doesn't have the CA cert...

when upgrading from Rails 3.2 to 4.0 I encountered an issue trying to run the app:

/var/lib/gems/1.9.1/gems/actionpack-4.0.13/lib/action_dispatch/middleware/stack.rb:107:in `delete': can't modify frozen Array (RuntimeError)
        from /var/...

A guide for setting up SNI so that a single IP address can be used to have multiple SSL certificates serving the same or multiple sites.

Issue when upgrading from Rails 3.2 to Rails 4.0, having run bundle update rails ... to update Rails and other gems with conflating gems, running bundle exec rake spec throws the following error:

rake aborted!
LoadError: cannot load such ...

You try to do some work on an old project which you haven't worked on for a while. You start up your development environment and try running the specs to make sure everything's in order, but you get the error:

`Your Ruby version is 2.1.8, but y...

While trying to upgrade from Rails 3.2 to 4.0 I had this problem when starting the app:

NoMethodError: undefined method `config' for nil:NilClass
/var/lib/gems/1.9.1/gems/railties-4.0.13/lib/rails.rb:32:in `configuration'
/var/lib/gems/1.9.1/...

There's a handy (and official) command line interface tool for dealing with AWS. It's great for managing files with S3.

Here's a short guide, somewhat from memory. Please improve this if you encounter any issues:

1. Install AWS cli via homebrew
   ...

If you have changes on a branch which you want to apply to another branch which has a different history you might not want to merge or rebase. This method allows you to identify a series of commits and replay them onto your destination branch. For...

If you need to backup and restore data for a single table in PostgreSQL you can use the following methods:

Backup table data

pg_dump -Fc --data-only -h<host> -p<port> -U<username> -W -d<database> -t<table> > ~/Downloads/<filename.dump>

...