bundle install ができない

Question

bundle installをしたのですが

Resolving dependencies...
Bundler could not find compatible versions for gem "actionmailbox":
  In snapshot (Gemfile.lock):
    actionmailbox (= 6.0.4)

  In Gemfile:
    rails (~> 6.0.4) was resolved to 6.0.4.8, which depends on
      actionmailbox (= 6.0.4.8)

Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

gem 'rails',      '~>6.0.4'
gem 'puma',       '~>4.3.6'
gem 'sass-rails', '~>5.1.0'
gem 'webpacker',  '~>4.0.7'
gem 'turbolinks', '~>5.2.0'
gem 'jbuilder',   '~>2.9.1'
gem 'bootsnap',   '~>1.10.3', require: false

group :development, :test do
  gem 'sqlite3', '1.4.1'
  gem 'byebug',  '11.0.1', platforms: [:mri, :mingw, :x64_mingw]
end

group :development do
  gem 'web-console',           '4.0.1'
  gem 'listen',                '3.1.5'
  gem 'spring',                '2.1.0'
  gem 'spring-watcher-listen', '2.0.1'
end

group :test do
  gem 'capybara',                 '3.28.0'
  gem 'selenium-webdriver',       '3.142.4'
  gem 'webdrivers',               '4.1.2'
  gem 'rails-controller-testing', '1.0.4'
  gem 'minitest',                 '5.15.0'
  gem 'minitest-reporters',       '1.3.8'
  gem 'guard',                    '2.16.2'
  gem 'guard-minitest',           '2.4.6'
end

group :production do
  gem 'pg', '1.1.4'
end
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

Answer 1

Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.

メッセージの通りbundle updateを実行しましょう。

Comments

[hiei1]

bundle updateしても
Fetching gem metadata from https://rubygems.org/...........
Resolving dependencies...
Bundler could not find compatible versions for gem "actionpack":
In snapshot (Gemfile.lock):
actionpack (>= 6.0.4.8)

In Gemfile:
rails (= 6.0.4.8) was resolved to 6.0.4.8, which depends on
actionpack (= 6.0.4.8)

rails (= 6.0.4.8) was resolved to 6.0.4.8, which depends on
sprockets-rails (>= 2.0.0) was resolved to 3.4.2, which depends on
actionpack (>= 5.2)

Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.

Bundler could not find compatible versions for gem "activesupport":
In snapshot (Gemfile.lock):
activesupport (>= 6.0.4.8)

In Gemfile:
rails (= 6.0.4.8) was resolved to 6.0.4.8, which depends on
activejob (= 6.0.4.8) was resolved to 6.0.4.8, which depends on
globalid (>= 0.3.6) was resolved to 1.0.0, which depends on
activesupport (>= 5.0)

rails (= 6.0.4.8) was resolved to 6.0.4.8, which depends on
activesupport (= 6.0.4.8)

rails (= 6.0.4.8) was resolved to 6.0.4.8, which depends on
actionpack (= 6.0.4.8) was resolved to 6.0.4.8, which depends on
rails-dom-testing (~> 2.0) was resolved to 2.0.3, which depends on
activesupport (>= 4.2.0)

rails (= 6.0.4.8) was resolved to 6.0.4.8, which depends on
sprockets-rails (>= 2.0.0) was resolved to 3.4.2, which depends on
activesupport (>= 5.2)

Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.

Bundler could not find compatible versions for gem "childprocess":
In snapshot (Gemfile.lock):
childprocess (>= 4.1.0)

In Gemfile:
selenium-webdriver (= 3.142.4) was resolved to 3.142.4, which depends on
childprocess (< 3.0, >= 0.5)

Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.
というエラーが出ます

[maisumakun]

バージョンの組み合わせによって正しくバージョン解決できない事態が生じることがありますね…

いったんGemfile.lockを削除するか別ファイル名にしてからbundle installしたらどうなりますか？

[hiei1]

Fetching gem metadata from https://rubygems.org/...........
Resolving dependencies...
Bundler found conflicting requirements for the Ruby version:
In Gemfile:
Ruby

capybara (= 3.28.0) was resolved to 3.28.0, which depends on
Ruby (>= 2.4.0)

guard (= 2.16.2) was resolved to 2.16.2, which depends on
Ruby (>= 1.9.3)

listen (= 3.1.5) was resolved to 3.1.5, which depends on
Ruby (>= 2.2.3, ~> 2.2)

pg (= 1.1.4) was resolved to 1.1.4, which depends on
Ruby (>= 2.0.0)

puma (= 4.3.6) was resolved to 4.3.6, which depends on
Ruby (>= と出ますね
selenium-webdriver (= 3.142.4) was resolved to 3.142.4, which depends on
Ruby (>= 2.3)
と出ますね