Rails：bundle installでエラーが発生します。

Question

bundle installをターミナルで行うと、以下のようなエラーが発生します。

MacBook-Pro-2 acme_corp % bundle install                           
Fetching gem metadata from https://rubygems.org/...........
Fetching gem metadata from https://rubygems.org/.
Resolving dependencies........
Bundler could not find compatible versions for
gem "activemodel":
  In Gemfile:
mongoid (~> 6.4.0) was resolved to 6.4.8,
which depends on
      activemodel (>= 5.1, < 6.0.0)

rails (~> 6.0.2, >= 6.0.2.1) was resolved to
6.0.3.rc1, which depends on
      activemodel (= 6.0.3.rc1)

# By default, Wagon 3 doesn't need `bundle exec` to be executed.
# However, if down the road, you want to run a specific version of Wagon or try a new version
# without overriding the global Wagon binary, please use this Gemfile.

source 'https://rubygems.org'

gem 'rails', '~> 6.0.2', '>= 6.0.2.1'

gem 'locomotivecms_wagon', '~> 3.0.5'
gem 'devise', '~> 4.7.1'
gem 'mongoid', '~> 6.4.0'

group :assets do
  gem 'compass',        '~> 1.0.3'
  gem 'compass-rails',  '~> 4.0.0'
  gem 'sass-rails', '< 5.1'
  gem 'coffee-rails',   '~> 5.0.0'
  gem 'uglifier',       '~> 4.2.0'
  gem 'therubyracer', :platforms => :ruby
end

gem 'unicorn'

group :development do
  # Mac OS X
  gem 'rb-fsevent', '~> 0.10.0', require: 'rb-fsevent' if RUBY_PLATFORM.include?('darwin')

  # Unix
  gem 'therubyracer', require: 'v8', platforms: :ruby unless RUBY_PLATFORM.include?('darwin')

  gem 'rb-inotify', '~> 0.10.0', require: 'rb-inotify' if RUBY_PLATFORM.include?('linux')

  # Windows
  gem 'wdm', '~> 0.1.1', require: 'wdm' if RUBY_PLATFORM =~ /mswin|mingw/i
end

gem "activemodel"の場合、どこを編集すべきでしょうか？
恐れ入りますが、解決方法をご教授いただけないでしょうか？

Comments

[m.ts10806]

どうすれば良いかはエラーに書いてありますが、読まれましたか？

Answer 1

mongoid 6系はRails 6系に対応していません。mongoidを7以上に指定してください。