如何在轨道上的红宝石中修复此错误。
source 'https://rubygems.org'
git_source(:github) do |repo_name|
repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
"https://github.com/#{repo_name}.git"
end
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.0.2'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use Puma as the app server
gem 'puma', '~> 3.0'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby
gem 'mysql 2', '0.4.8'
# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 3.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development
group :development, :test do
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug', platform: :mri
end
group :development do
# Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
gem 'web-console', '>= 3.3.0'
gem 'listen', '~> 3.0.5'
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring'
gem 'spring-watcher-listen', '~> 2.0.0'
end
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
gem 'spree', '~> 3.2.1'
gem 'spree_auth_devise', github: 'spree/spree_auth_devise'
gem 'spree_gateway', github: 'spree/spree_gateway'
gem 'spree_i18n', github: 'spree-contrib/spree_i18n', branch: 'master'
我运行了＆＃39;捆绑安装＆＃39;并发生此错误。 因此，为了修复项目的错误，我运行了gem install mysql2＆＃39; 0.4.8＆＃39;＆＃39;＆＃39;在控制台中命令，但我无法修复它。
这个ruby on rails使用Spree框架。
编辑：
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory: /Users/admin/.rvm/gems/ruby-2.4.1/gems/mysql2-0.4.8/ext/mysql2
/Users/admin/.rvm/rubies/ruby-2.4.1/bin/ruby -r ./siteconf20170803-6579-foq4sg.rb extconf.rb
checking for rb_absint_size()... yes
我跑了＆＃39;捆绑安装＆＃39;但由于这个错误，我无法成功执行此命令。
答案 0 :(得分：33)
我认为你错过了mysql的dev库：
关于ubuntu
sudo apt-get install libmysqlclient-dev
在使用yum的Red Hat / CentOS和其他发行版上：
sudo yum install mysql-devel
在带有自制软件的Mac OS X上：
brew install mysql
答案 1 :(得分：6)
对于Mac，我遇到了openssl问题
An error occurred while installing mysql2 (0.5.2), and Bundler cannot continue.
我修复了以下问题使用命令；
$ bundle config --local build.mysql2 "--with-ldflags=-L/usr/local/opt/openssl/lib --with-cppflags=-I/usr/local/opt/openssl/include"
$ sudo bundle install
控制台结果：
Fetching mysql2 0.5.2
Installing mysql2 0.5.2 with native extensions
Using puma 3.12.0
Using sprockets 3.7.2
Using sprockets-rails 3.2.1
Fetching rails 5.2.2.1
Installing rails 5.2.2.1
Using rubyzip 1.2.2
Using sass-listen 4.0.0
Using sass 3.7.3
Using tilt 2.0.9
Using sass-rails 5.0.7
Using selenium-webdriver 3.141.0
Using spring 2.0.2
Using spring-watcher-listen 2.0.1
Using turbolinks-source 5.2.0
Using turbolinks 5.2.0
Using uglifier 4.1.20
Using web-console 3.7.0
Bundle complete! 18 Gemfile dependencies, 79 gems now installed.
Use `bundle info [gemname]` to see where a bundled gem is installed.
答案 2 :(得分：1)
我遇到了类似的问题，但是对于v4.10
Error occurred while installing mysql2 (0.4.10), and Bundler cannot continue
所以我必须运行以下命令来解决上述问题。
sudo apt-get update
sudo apt-get install build-essential
答案 3 :(得分：1)
答案 4 :(得分：0)
如果您使用的是Mac，请确保先安装了openSSL。
brew install openssl
然后导出
$ export LDFLAGS="-L/usr/local/opt/openssl/lib"
$ export CPPFLAGS="-I/usr/local/opt/openssl/include"
然后运行捆绑包
bundle install
我几乎失去了剩下的头发，因为我有了一台新机器，而且我不记得必须安装openssl。