Rails upgrade from 5.0.2 to 5.1.0

Question

I tried to upgrade the current version rails 5.0.2to the latest version rails 5.1.0, running bundle update railsafter adding gem 'rails', '~> 5.1'to mine Gemfile, and I received this error message.

Bundler could not find compatible versions for gem "activesupport":
  In Gemfile:
    rails (~> 5.1) was resolved to 5.1.0, which depends on
      activejob (= 5.1.0) was resolved to 5.1.0, which depends on
        globalid (>= 0.3.6) was resolved to 0.4.0, which depends on
          activesupport (>= 4.2.0)

jbuilder (~> 2.5) was resolved to 2.6.1, which depends on
  activesupport (< 5.1, >= 3.0.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  activesupport (= 5.1.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  actionpack (= 5.1.0) was resolved to 5.1.0, which depends on
    rails-dom-testing (~> 2.0) was resolved to 2.0.2, which depends on
      activesupport (< 6.0, >= 4.2.0)

rails (~> 5.1) was resolved to 5.1.0, which depends on
  sprockets-rails (>= 2.0.0) was resolved to 3.2.0, which depends on
    activesupport (>= 4.0)

Answer 1

It looks like you need to try and upgrade to the new version of jbuilder. However, looking at RubyGems, current Jbuilder dependencies still say:

activesupport <5.1,> = 3.0.0

IF this is the case, JBuilder does not yet support the more recent Activesupport, now required by Rails 5.1 - so maybe JBuilder is not yet available in Rails 5.1.

If you need to get new Rails, you should probably consider:

• , , JBuilder .
• JBuilder Rails.

- , < 5.1 , , , . , .

- - - .

Answer 2

Gemfile.lock,