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This card shows how to upgrade a Rails 2 application from Rails 2.3.8 through every single patch level up to...

...upgrading Rails, have a look at Rails LTS. How many update steps? Besides the Rails upgrade itself, you might also want to upgrade your other gems and upgrade your Ruby...

...I prefer to simply upgrade all gems together with Rails. Workflow for each major Rails upgrade (A) Take note of patches and quirks for your specific version upgrade: Upgrade Rails...