How can my Rails app accept RAILS_GEM_VERSION minor version bumps

My rails project has this line in /config/environment.rb

# Specifies gem version of Rails to use when vendor/rails is not present
RAILS_GEM_VERSION = '2.3.2' unless defined? RAILS_GEM_VERSION

As we now have 2.3.5 as the most recent upgrade, is there a way to make my environment.rb accept minor version b开发者_运维问答umps?

(without I have to explicitly change 2.3.2 to 2.3.5)

No, there isn't.

You application needs to use a specific Rails version mostly because different tiny releases might require additional steps to upgrade the framework such as changes to boot.rb.

$ rake rails:update

Things have evolved a bit since Rails 2, so Ill share what I had to do to get from 5.0.0 to 5.0.0.1 today.

My Gemfile read gem 'rails', '~> 5.0.0'. I figured that was enough, but bundle install was not updating anything new. So I tried to force it with gem 'rails', '~> 5.0' which also did nothing new when I ran update (note: this is for an experimental app of my own, and not someone else's app I am working on - don't just default to allowing minor version updates to solve problems like this ;) ). So I had to try a few other ways to force this security patch/hotfix.

First, I had to install the package locally:

gem install rails --version 5.0.0.1

Next, I updated bundler:

bundle install

...and I saw this in the output: Using rails 5.0.0.1 (was 5.0.0)

When I ran ./bin/rake rails:update, it wiped the contents of my config/routes.rb file, changed many of my settings in various config files (some of which were dangerous security settings to change), among a few other seemingly benign changes. While this is the expected behavior, I am pointing this out as not exactly a desirable method for updating a minor patch/hotfix for rails.

Firstly, you need to change the version to 2.3.5 from 2.3.5 and then run

rake rails:update