Dependency error while upgrading to rails 6 - ruby-on-rails

Question

I am trying to upgrade to rails 6 from rails 5.2, following these instructions:
https://blog.rubynetti.it/i/how-to-upgrade-to-rails-6-from-rails-5-2-1
When I run bundle update, I get the following errors and don't know how to fix them. I tried, deleting my lock file, and running it again, I tried running bundle update railties, but get an error saying I should run 'bundle update'
Please help!
Error message after bundle update
Resolving dependencies........
Bundler could not find compatible versions for gem "railties":
In Gemfile:
coffee-rails (~> 4.2) was resolved to 4.2.2, which depends on
railties (>= 4.0.0)
devise was resolved to 4.7.1, which depends on
railties (>= 4.1.0)
factory_bot_rails was resolved to 5.1.1, which depends on
railties (>= 4.2.0)
jquery-ui-rails was resolved to 6.0.1, which depends on
railties (>= 3.2.16)
rails (~> 6.0, >= 6.0.2.1) was resolved to 6.0.2.1, which depends on
railties (= 6.0.2.1)
rspec-rails (~> 3.8) was resolved to 3.9.0, which depends on
railties (>= 3.0)
teaspoon-jasmine was resolved to 2.3.4, which depends on
teaspoon (>= 1.0.0) was resolved to 1.1.4, which depends on
railties (>= 3.2.5, < 5)
web-console (>= 3.3.0) was resolved to 4.0.1, which depends on
railties (>= 6.0.0)
wicked was resolved to 1.3.4, which depends on
railties (>= 3.0.7)
Bundler could not find compatible versions for gem "thor":
In Gemfile:
jquery-rails was resolved to 4.3.5, which depends on
thor (>= 0.14, < 2.0)
rails (~> 6.0, >= 6.0.2.1) was resolved to 6.0.2.1, which depends on
railties (= 6.0.2.1) was resolved to 6.0.2.1, which depends on
thor (>= 0.20.3, < 2.0)
select2-rails was resolved to 4.0.3, which depends on
thor (~> 0.14)
gemfile
# frozen_string_literal: true
source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby '2.6.5'
gem 'rails', '~> 6.0', '>= 6.0.2.1'
gem 'pg', '~> 0.18.4'
gem 'active_hash'
gem 'bootsnap', '>= 1.1.0', require: false
gem 'puma', '~> 3.12'
gem 'sassc'
gem 'uglifier', '>= 1.3.0'
gem 'bootstrap', '~> 4.3.1'
gem 'jquery-rails'
gem 'jquery-ui-rails'
gem 'devise'
gem 'devise-bootstrap-views', '~> 1.0'
gem 'devise-i18n'
gem 'simple_form', '~> 5.0.1'
gem "select2-rails"
gem 'wicked'
gem 'pagy'
gem 'geocoder'
gem 'mailboxer'
gem 'stripe'
gem 'coffee-rails', '~> 4.2'
gem 'turbolinks', '~> 5'
gem 'jbuilder', '~> 2.5'
gem 'activerecord-import'
gem 'rubocop', require: false
gem 'rubocop-rails'
gem 'rubocop-performance'
group :development, :test do
gem 'byebug', platforms: %i[mri mingw x64_mingw]
gem 'pry'
gem 'rspec-rails', '~>3.8'
gem 'spring-commands-rspec'
gem 'factory_bot_rails'
gem 'database_cleaner'
gem 'faker', git: 'https://github.com/stympy/faker.git', branch: 'master'
gem "teaspoon-jasmine"
end
group :development do
gem 'listen', '>= 3.0.5'
gem 'web-console', '>= 3.3.0'
end
group :test do
gem 'capybara', '>= 2.15'
gem 'selenium-webdriver'
gem 'webdrivers', '~> 4.0'
gem 'stripe-ruby-mock', '~> 2.5.8', :require => 'stripe_mock'
end
gem 'tzinfo-data', platforms: %i[mingw mswin x64_mingw jruby]
gemfile.lock
GIT
remote: https://github.com/stympy/faker.git
revision: 585093235822362e345034da46945b6ea8ssed9d
branch: master
specs:
faker (2.9.0)
i18n (>= 1.6, < 1.8)
GEM
remote: https://rubygems.org/
specs:
actioncable (5.2.4.1)
actionpack (= 5.2.4.1)
nio4r (~> 2.0)
websocket-driver (>= 0.6.1)
actionmailer (5.2.4.1)
actionpack (= 5.2.4.1)
actionview (= 5.2.4.1)
activejob (= 5.2.4.1)
mail (~> 2.5, >= 2.5.4)
rails-dom-testing (~> 2.0)
actionpack (5.2.4.1)
actionview (= 5.2.4.1)
activesupport (= 5.2.4.1)
rack (~> 2.0, >= 2.0.8)
rack-test (>= 0.6.3)
rails-dom-testing (~> 2.0)
rails-html-sanitizer (~> 1.0, >= 1.0.2)
actionview (5.2.4.1)
activesupport (= 5.2.4.1)
builder (~> 3.1)
erubi (~> 1.4)
rails-dom-testing (~> 2.0)
rails-html-sanitizer (~> 1.0, >= 1.0.3)
active_hash (3.0.0)
activesupport (>= 5.0.0)
activejob (5.2.4.1)
activesupport (= 5.2.4.1)
globalid (>= 0.3.6)
activemodel (5.2.4.1)
activesupport (= 5.2.4.1)
activerecord (5.2.4.1)
activemodel (= 5.2.4.1)
activesupport (= 5.2.4.1)
arel (>= 9.0)
activerecord-import (1.0.4)
activerecord (>= 3.2)
activestorage (5.2.4.1)
actionpack (= 5.2.4.1)
activerecord (= 5.2.4.1)
marcel (~> 0.3.1)
activesupport (5.2.4.1)
concurrent-ruby (~> 1.0, >= 1.0.2)
i18n (>= 0.7, < 2)
minitest (~> 5.1)
tzinfo (~> 1.1)
addressable (2.7.0)
public_suffix (>= 2.0.2, < 5.0)
arel (9.0.0)
ast (2.4.0)
autoprefixer-rails (9.7.3)
execjs
bcrypt (3.1.13)
bindex (0.8.1)
bootsnap (1.4.5)
msgpack (~> 1.0)
bootstrap (4.3.1)
autoprefixer-rails (>= 9.1.0)
popper_js (>= 1.14.3, < 2)
sassc-rails (>= 2.0.0)
builder (3.2.4)
byebug (11.0.1)
capybara (3.30.0)
addressable
mini_mime (>= 0.1.3)
nokogiri (~> 1.8)
rack (>= 1.6.0)
rack-test (>= 0.6.3)
regexp_parser (~> 1.5)
xpath (~> 3.2)
carrierwave (2.0.2)
activemodel (>= 5.0.0)
activesupport (>= 5.0.0)
addressable (~> 2.6)
image_processing (~> 1.1)
mimemagic (>= 0.3.0)
mini_mime (>= 0.1.3)
childprocess (3.0.0)
coderay (1.1.2)
coffee-rails (4.2.2)
coffee-script (>= 2.2.0)
railties (>= 4.0.0)
coffee-script (2.4.1)
coffee-script-source
execjs
coffee-script-source (1.12.2)
concurrent-ruby (1.1.5)
crass (1.0.5)
dante (0.2.0)
database_cleaner (1.7.0)
devise (4.7.1)
bcrypt (~> 3.0)
orm_adapter (~> 0.1)
railties (>= 4.1.0)
responders
warden (~> 1.2.3)
devise-bootstrap-views (1.1.0)
devise-i18n (1.9.0)
devise (>= 4.7.1)
diff-lcs (1.3)
erubi (1.9.0)
execjs (2.7.0)
factory_bot (5.1.1)
activesupport (>= 4.2.0)
factory_bot_rails (5.1.1)
factory_bot (~> 5.1.0)
railties (>= 4.2.0)
ffi (1.11.3)
geocoder (1.5.2)
globalid (0.4.2)
activesupport (>= 4.2.0)
i18n (1.7.0)
concurrent-ruby (~> 1.0)
image_processing (1.10.0)
mini_magick (>= 4.9.5, < 5)
ruby-vips (>= 2.0.13, < 3)
jaro_winkler (1.5.4)
jbuilder (2.9.1)
activesupport (>= 4.2.0)
jquery-rails (4.3.5)
rails-dom-testing (>= 1, < 3)
railties (>= 4.2.0)
thor (>= 0.14, < 2.0)
jquery-ui-rails (6.0.1)
railties (>= 3.2.16)
listen (3.2.1)
rb-fsevent (~> 0.10, >= 0.10.3)
rb-inotify (~> 0.9, >= 0.9.10)
loofah (2.4.0)
crass (~> 1.0.2)
nokogiri (>= 1.5.9)
mail (2.7.1)
mini_mime (>= 0.1.1)
mailboxer (0.15.1)
carrierwave (>= 0.5.8)
rails (>= 5.0.0)
marcel (0.3.3)
mimemagic (~> 0.3.2)
method_source (0.9.2)
mimemagic (0.3.3)
mini_magick (4.9.5)
mini_mime (1.0.2)
mini_portile2 (2.4.0)
minitest (5.13.0)
msgpack (1.3.1)
multi_json (1.14.1)
nio4r (2.5.2)
nokogiri (1.10.7)
mini_portile2 (~> 2.4.0)
orm_adapter (0.5.0)
pagy (3.7.1)
parallel (1.19.1)
parser (2.7.0.0)
ast (~> 2.4.0)
pg (0.18.4)
popper_js (1.14.5)
pry (0.12.2)
coderay (~> 1.1.0)
method_source (~> 0.9.0)
public_suffix (4.0.2)
puma (3.12.2)
rack (2.0.8)
rack-test (1.1.0)
rack (>= 1.0, < 3)
rails (5.2.4.1)
actioncable (= 5.2.4.1)
actionmailer (= 5.2.4.1)
actionpack (= 5.2.4.1)
actionview (= 5.2.4.1)
activejob (= 5.2.4.1)
activemodel (= 5.2.4.1)
activerecord (= 5.2.4.1)
activestorage (= 5.2.4.1)
activesupport (= 5.2.4.1)
bundler (>= 1.3.0)
railties (= 5.2.4.1)
sprockets-rails (>= 2.0.0)
rails-dom-testing (2.0.3)
activesupport (>= 4.2.0)
nokogiri (>= 1.6)
rails-html-sanitizer (1.3.0)
loofah (~> 2.3)
railties (5.2.4.1)
actionpack (= 5.2.4.1)
activesupport (= 5.2.4.1)
method_source
rake (>= 0.8.7)
thor (>= 0.19.0, < 2.0)
rainbow (3.0.0)
rake (13.0.1)
rb-fsevent (0.10.3)
rb-inotify (0.10.1)
ffi (~> 1.0)
regexp_parser (1.6.0)
responders (3.0.0)
actionpack (>= 5.0)
railties (>= 5.0)
rspec-core (3.9.0)
rspec-support (~> 3.9.0)
rspec-expectations (3.9.0)
diff-lcs (>= 1.2.0, < 2.0)
rspec-support (~> 3.9.0)
rspec-mocks (3.9.0)
diff-lcs (>= 1.2.0, < 2.0)
rspec-support (~> 3.9.0)
rspec-rails (3.9.0)
actionpack (>= 3.0)
activesupport (>= 3.0)
railties (>= 3.0)
rspec-core (~> 3.9.0)
rspec-expectations (~> 3.9.0)
rspec-mocks (~> 3.9.0)
rspec-support (~> 3.9.0)
rspec-support (3.9.0)
rubocop (0.78.0)
jaro_winkler (~> 1.5.1)
parallel (~> 1.10)
parser (>= 2.6)
rainbow (>= 2.2.2, < 4.0)
ruby-progressbar (~> 1.7)
unicode-display_width (>= 1.4.0, < 1.7)
rubocop-performance (1.5.2)
rubocop (>= 0.71.0)
rubocop-rails (2.4.1)
rack (>= 1.1)
rubocop (>= 0.72.0)
ruby-progressbar (1.10.1)
ruby-vips (2.0.16)
ffi (~> 1.9)
rubyzip (2.0.0)
sassc (2.2.1)
ffi (~> 1.9)
sassc-rails (2.1.2)
railties (>= 4.0.0)
sassc (>= 2.0)
sprockets (> 3.0)
sprockets-rails
tilt
select2-rails (4.0.3)
thor (~> 0.14)
selenium-webdriver (3.142.7)
childprocess (>= 0.5, < 4.0)
rubyzip (>= 1.2.2)
simple_form (5.0.1)
actionpack (>= 5.0)
activemodel (>= 5.0)
spring (2.1.0)
spring-commands-rspec (1.0.4)
spring (>= 0.9.1)
sprockets (4.0.0)
concurrent-ruby (~> 1.0)
rack (> 1, < 3)
sprockets-rails (3.2.1)
actionpack (>= 4.0)
activesupport (>= 4.0)
sprockets (>= 3.0.0)
stripe (5.11.0)
stripe-ruby-mock (2.5.8)
dante (>= 0.2.0)
multi_json (~> 1.0)
stripe (>= 2.0.3)
teaspoon (1.1.5)
railties (>= 3.2.5, < 6)
teaspoon-jasmine (2.3.4)
teaspoon (>= 1.0.0)
thor (0.20.3)
thread_safe (0.3.6)
tilt (2.0.10)
turbolinks (5.2.1)
turbolinks-source (~> 5.2)
turbolinks-source (5.2.0)
tzinfo (1.2.6)
thread_safe (~> 0.1)
uglifier (4.2.0)
execjs (>= 0.3.0, < 3)
unicode-display_width (1.6.0)
warden (1.2.8)
rack (>= 2.0.6)
web-console (3.7.0)
actionview (>= 5.0)
activemodel (>= 5.0)
bindex (>= 0.4.0)
railties (>= 5.0)
webdrivers (4.1.3)
nokogiri (~> 1.6)
rubyzip (>= 1.3.0)
selenium-webdriver (>= 3.0, < 4.0)
websocket-driver (0.7.1)
websocket-extensions (>= 0.1.0)
websocket-extensions (0.1.4)
wicked (1.3.4)
railties (>= 3.0.7)
xpath (3.2.0)
nokogiri (~> 1.8)
PLATFORMS
ruby
DEPENDENCIES
active_hash
activerecord-import
bootsnap (>= 1.1.0)
bootstrap (~> 4.3.1)
byebug
capybara (>= 2.15)
coffee-rails (~> 4.2)
database_cleaner
devise
devise-bootstrap-views (~> 1.0)
devise-i18n
factory_bot_rails
faker!
geocoder
jbuilder (~> 2.5)
jquery-rails
jquery-ui-rails
listen (>= 3.0.5)
mailboxer
pagy
pg (~> 0.18.4)
pry
puma (~> 3.12)
rails (~> 5.2.3)
rspec-rails (~> 3.8)
rubocop
rubocop-performance
rubocop-rails
sassc
select2-rails
selenium-webdriver
simple_form (~> 5.0.1)
spring-commands-rspec
stripe
stripe-ruby-mock (~> 2.5.8)
teaspoon-jasmine
turbolinks (~> 5)
tzinfo-data
uglifier (>= 1.3.0)
web-console (>= 3.3.0)
webdrivers (~> 4.0)
wicked
RUBY VERSION
ruby 2.6.5p114
BUNDLED WITH
2.0.2

Answer 1

I ran into a similar issue when upgrading. There's a lot of noise in these dependency warnings, so it can be tricky to find the issue, so it's all about knowing where to look. Luckily one of the devs I work with was able to help me out.
railties
The issue here is that railties, because it is a gem that ships with rails, is trying to upgrade to version 6, but your teaspoon-jasmine gem has a sub-dependency (teaspoon) that requires railties >= 3.2.5, < 5. In most situations like this you would want upgrade teaspoon-jasmine to a version that supports rails 6, but it looks like you have the latest version of teaspoon-jasmine (2.3.4), so I would look into maybe getting rid of this if you can and replace it with a gem that is still being maintained, or if you need to you could fork that gem and configure it to work with rails 6.
thor
Very similar issue here that most likely has to do with select2-rails. This gem appears to not have been updated since 2016, and it requires an old version of thor. See gemspec for that gem here. I would do the same thing here and look into maybe getting rid of select2-rails if you can and replace it with a gem that is still being maintained, or if you need to you could fork that gem and configure it to work with rails 6.