Gem file is requesting dependencies that are installed when upgrading from Rails 4 to Rails 5 but it says it could not find compatible versions

Question

This is my first major upgrade of Rails (v4 to v5). I've done minor upgrades, like 4.1.1 to 4.2 etc...

I've upgraded to 5.1.1, and I'm getting this dependency error in the console

Bundler could not find compatible versions for gem "actionmailer":
  In Gemfile:
    mail_form (= 1.7.0) was resolved to 1.7.0, which depends on
      actionmailer (< 5.2, >= 3.2)

    rails (>= 5.1.1, ~> 5.1) was resolved to 5.1.1, which depends on
      actionmailer (= 5.1.1)

however, I have actionmailer 5.1.1 installed. That looks like what it's asking for. These seems like an noob question, but it looks like rails MUST have actionmailer 5.1.1 and mail_form can have version less than 5.2 or equal/greater than 3.2. 5.1.1 satisfies both these conditions....so what's going on?

It also says this further down

Could not find gem 'rails (>= 5.1.1, ~> 5.1)' in any of the sources.

But I've uninstalled and reinstalled rails 5.1.1 to make sure.

I also tried doing this with 5.0.0 and had the same issue.

This is just one of many, many "Bundler could not find compatible versions for gem " errors in this bundle.

ruby '2.3.1'

source 'https://rubygems.org'

gem 'rails', '~> 5.1', '>= 5.1.1'

gem 'pg'
gem 'sass-rails', '~> 5.0', '>= 5.0.6'
gem 'uglifier', '>= 1.3.0'
gem 'yui-compressor'

# gem 'coffee-rails', '~> 4.1.0'
gem 'twitter-bootstrap-rails',  '= 3.2.2'
gem 'bootstrap-sass',  '>= 3.3.6'
gem 'draper', '= 3.0.1' 
gem 'jquery-rails', '~> 4.1', '>= 4.1.1'
gem "jquery-ui-rails"
gem 'sidekiq', '~> 4.2', '>= 4.2.2'
gem 'redis'
gem 'redis-namespace'
# gem 'turbolinks' 
gem 'jbuilder', '= 2.7.0'
gem 'sdoc', '~> 0.4.0', group: :doc
gem 'devise', '= 4.4.0'
gem 'omniauth', '~> 1.3', '>= 1.3.1'
gem 'omniauth-facebook'
gem 'omniauth-google-oauth2', '~> 0.3.0'
gem 'omniauth-twitter'
gem 'omniauth-eventbrite', '~> 0.0.6'
gem 'twitter' #for posting to twitter
gem 'koala' #for posting to facebook
gem 'sprockets-rails', '= 3.2.1'
gem 'sprockets', '~> 3.7', '>= 3.7.1'
gem 'geoip', '~> 1.6', '>= 1.6.1'
gem 'jsTimezoneDetect-rails'
gem 'simple_form'
# gem 'client_side_validations',  '= 4.2.12' #todo check validations NO RAILS 5
# gem 'client_side_validations-simple_form', '= 3.4.0'
gem 'acts_as_commentable'
gem 'attr_encrypted', '~> 3.0', '>= 3.0.3'
gem 'httparty', '~> 0.14.0'
gem "skylight"
gem 'braintree'
gem 'bitly', '~> 1.1', '>= 1.1.1'
# gem 'ahoy_email', '~> 0.2.3'
# gem 'compass-rails' #needed for chosen
# gem 'chosen-rails', '~> 1.5', '>= 1.5.2'
gem 'bootstrap-table-rails', '~> 1.11'
# gem 'chartjs-ror'
gem 'chartkick', '~> 2.2', '>= 2.2.3'
gem 'groupdate', '= 3.2.0'
gem 'hightop', '~> 0.2.0'
gem 'active_median', '~> 0.1.4'

gem 'bootstrap-tagsinput-rails'
gem 'faker'
gem 'slim'
# gem 'less-rails', '>= 2.8'
# gem 'less-rails', github: 'metaskills/less-rails', branch: 'depends_only_on_less_files'
# gem 'less-rails', git: 'https://github.com/Genkilabs/less-rails' #fix for deprecated Sprockets ImportProcessor
gem 'less-rails-bootstrap'
gem 'therubyracer'
gem 'american_date'
gem 'mail_form', '= 1.7.0'
# gem 'cancancan'
gem 'kaminari', '= 1.1.1'
gem 'bootstrap-kaminari-views', '~> 0.0.5'
gem 'aws-sdk', '~> 2'
gem 'carrierwave-aws'
gem 'carrierwave'
gem 'carrierwave-base64'
gem 'rmagick', '~> 2.16'
gem 'simple_form_fancy_uploads', '~> 0.2.0'
gem 'remotipart', '~> 1.2.1'
gem 'wysiwyg-rails', '=  2.7.3'
gem 'wicked'
gem 'meta-tags', '= 2.7.0'
gem 'acts-as-taggable-on', '~> 4.0'
gem 'acts_as_list', '~> 0.7.2'
gem 'factory_girl_rails'
gem 'friendly_id', '~> 5.1.0'
gem 'paranoia', '~> 2.2', '>= 2.2.1'
gem 'google-analytics-rails', '~> 1.1'
gem 'responders', '= 2.4.0'
gem 'cocoon', '~> 1.2', '>= 1.2.9'
gem 'momentjs-rails', '>= 2.9.0'
gem 'bootstrap3-datetimepicker-rails', '~> 4.17.42'
gem 'tzinfo', '~> 1.2', '>= 1.2.3'
gem 'tzinfo-data'
# gem 'temporal-rails', '~> 0.2.4' #railties dependency
gem 'geocoder', '~> 1.3', '>= 1.3.1'
gem 'timezone', '~> 1.1'
gem 'browser'
gem 'jquery-datatables-rails', '~> 3.4'
gem 'hashie', '~> 3.4', '>= 3.4.4'
# Sinatra - might be required for the Sidekiq web UI?
gem 'sinatra', '~> 1.2'

gem 'paypal-sdk-permissions'
gem 'paypal-sdk-rest' #maybe use



# gem 'paypal-sdk-invoice'
# gem 'resque', '~> 1.26'
# gem 'resque-scheduler', '~> 4.1'
# gem 'active_scheduler', '~> 0.0.3'
gem 'wicked_pdf'
gem 'wkhtmltopdf-binary'
gem 'gon', '~> 6.0', '>= 6.0.1'

gem 'puma'
gem 'rack-timeout'
gem 'rest-client'
gem 'airbrake', '~> 5.6', '>= 5.6.1'
# gem 'rack-cache', '~> 1.6', '>= 1.6.1'
gem 'rack-attack', '~> 5.0', '>= 5.0.1'
gem 'rack-cors', '~> 0.4.0'
gem 'puma_worker_killer', '~> 0.0.7'
gem 'local-subdomain'
gem 'scout_apm'

gem 'concerned_with', '~> 0.1.0'
# gem 'elasticsearch-rails', git: 'git://github.com/elasticsearch/elasticsearch-rails.git'
# gem 'elasticsearch-model', git: 'git://github.com/elasticsearch/elasticsearch-rails.git'

gem 'pusher', '~> 1.3.1'

group :development do
  gem 'better_errors'
  # gem 'quiet_assets'
  gem 'foreman'
  gem 'guard-rspec', require: false
  # gem 'bullet', '~> 5.0'
  gem 'rake', '~> 11.1', '>= 11.1.1'
  gem 'web-console', '>= 2.3.0'
  # gem 'derailed_benchmarks', '~> 1.3', '>= 1.3.1'
  # gem 'rack-mini-profiler', '~> 0.10.1'

end


group :development, :test do
  gem 'rspec-rails','= 3.7.2'
  gem 'byebug'
  gem 'spring'
  gem 'spring-commands-rspec'
  gem 'mailcatcher', '~> 0.6.4'
  gem 'capybara', '~> 2.7', '>= 2.7.1'
  gem 'capybara-screenshot', '~> 1.0', '>= 1.0.13'
  gem 'database_cleaner'
  gem "email_spec"
  gem 'shoulda-matchers'
  gem 'rspec-activejob'
  gem 'awesome_print'
  gem 'lol_dba', '~> 2.1', '>= 2.1.1'
  gem 'rb-readline'
# gem 'invoice_samples', :git => "https://github.com/paypal/invoice-sdk-ruby.git"

end

group :test do
  gem 'poltergeist'
  gem 'selenium-webdriver'
  gem 'launchy'
  gem 'db-query-matchers'
  gem 'timecop'
  gem 'codeclimate-test-reporter'
  gem 'webmock', '~> 2.1'
end

group :production do
  gem 'rails_12factor'
  gem 'newrelic_rpm'
  gem 'keen'
end

Answer 1

I ended up rebuilding the gem file line by line starting with just rails and pg and then pasting and bundle installing each new line.

I found I was hanging on "Sinatra".

None of the errors I found in bundling the complete gem file appeared in the line-by-line bundle. Sigh.

Answer 2

Before you bundle install, are you making sure to have RVM set to the ruby version you need (rvm use 2.3.1p112)?

You might also try bundle update before install and see if that helps.