我一直在为activemodel遇到不兼容问题。当前错误是;
Bundler could not find compatible versions for gem "activemodel":
In Gemfile:
mongoid (~> 4.0.0) was resolved to 4.0.0, which depends on
activemodel (~> 4.0)
rails (~> 5.0.0) was resolved to 5.0.0, which depends on
activemodel (= 5.0.0)
rails (~> 5.0.0) was resolved to 5.0.0, which depends on
activemodel (= 5.0.0)
我当前的版本是;
在另一个但类似的行上，我设置我的webapp没有活动记录，并且还卸载了gem但它似乎总是在我的gemfile中重新出现。
创建我的webapp时 -
rails new test-app --skip-active-record --skip-test-unit
的Gemfile：
source 'https://rubygems.org'
gem 'rails', '~> 5.0.0'
group :assets do
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails'
end
# Use jquery as the JavaScript library
gem 'jquery-rails'
# Mongo linker
gem 'mongoid', git: 'https://github.com/estolfo/mongoid.git'
# Turbolinks makes navigating web application faster.
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder'
group :development do
gem 'better_errors'
gem 'binding_of_caller', :platforms=>[:mri_19, :mri_20, :rbx]
gem 'quiet_assets'
end
#Rspec for unit testing
gem "rspec-rails", :group => [:development, :test]
gem 'figaro'
gem "capybara", :group => :test
gem "database_cleaner", :group => :test
gem "mongoid-rspec", :group => :test
gem "email_spec", :group => :test
gem "cucumber-rails", :group => :test, :require => false
gem "launchy", :group => :test
gem "factory_girl_rails", :group => [:development, :test]
gem "devise"
gem 'therubyracer', platforms: :ruby
一旦我改变我的Gemfile特别是mongoid
gem 'mongoid', git: 'https://github.com/estolfo/mongoid.git', branch: 'MONGOID-4218-rails-5'
错误来了 -
Bundler could not find compatible versions for gem "activesupport":
In Gemfile:
mongoid was resolved to 6.0.0, which depends on
activemodel (= 5.0.0.beta3) was resolved to 5.0.0.beta3, which depends on
activesupport (= 5.0.0.beta3)
rails (~> 5.0.0) was resolved to 5.0.0, which depends on
activesupport (= 5.0.0)
rails (~> 5.0.0) was resolved to 5.0.0, which depends on
activesupport (= 5.0.0)
rails (~> 5.0.0) was resolved to 5.0.0, which depends on
activesupport (= 5.0.0)
答案 0 :(得分：1)
我能够使用您在问题中提供的步骤以及Gemfile重新创建您的开发环境。在我的情况下，我已设法解决您提到的冲突并安装mongoid gem，如下所示。
首先，我不知道你为什么使用official mongoid repository的分叉回购。这样，我决定使用官方gem并更改了Gemfile中的行（虽然我认为这个解决方案仍然有效，以防你想从其他仓库安装gem）：gem 'mongoid'。< / p>
之后，我执行了bundle install并收到以下错误：
Bundler could not find compatible versions for gem "railties":
In Gemfile:
quiet_assets (>= 1.0.2) was resolved to 1.0.2, which depends on
railties (< 5.0, >= 3.1)
rails (~> 5.0.0) was resolved to 5.0.0, which depends on
railties (= 5.0.0)
rspec-rails was resolved to 3.5.1, which depends on
railties (>= 3.0)
sass-rails (~> 5.0) was resolved to 5.0.5, which depends on
railties (< 6, >= 4.0.0)
检查输出我发现冲突的宝石是quiet_assets。考虑到这一点，我访问了quiet_assets GitHub repository并在其README.md中找到了以下内容：
弃用
从sprockets-rails版本3.1.0开始，在当前版本中使用 rails，这个gem已被弃用。
资产管道现在支持一个禁止输出的安静选项 资产申请：
# config/environments/development.rb config.assets.quiet = true
现在可以完成此gem的功能，将这一小部分配置添加到您的Rails环境文件中，因此我从quiet_assets删除了需要Gemfile的行，将文档保留为如下：
source 'https://rubygems.org'
gem 'rails', '~> 5.0.0'
group :assets do
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails'
end
# Use jquery as the JavaScript library
gem 'jquery-rails'
# Mongo linker
gem 'mongoid'
# Turbolinks makes navigating web application faster.
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder'
group :development do
gem 'better_errors'
gem 'binding_of_caller', :platforms=>[:mri_19, :mri_20, :rbx]
end
#Rspec for unit testing
gem "rspec-rails", :group => [:development, :test]
gem 'figaro'
gem "capybara", :group => :test
gem "database_cleaner", :group => :test
gem "mongoid-rspec", :group => :test
gem "email_spec", :group => :test
gem "cucumber-rails", :group => :test, :require => false
gem "launchy", :group => :test
gem "factory_girl_rails", :group => [:development, :test]
gem "devise"
gem 'therubyracer', platforms: :ruby
执行另一个bundle install后，这次成功安装了所有依赖项。
我希望这可以帮到你。如果此解决方案不符合您的需求，请告诉我。
答案 1 :(得分：0)
使用gem uninstall rails卸载Rails。
您目前拥有Rails 5.0.0，但需要来自5.0.0.beta3的activesupport。
因此，您应该运行gem install rails -v 5.0.0.beta3。
然后尝试rails new。