Ruby on Rails 4.1.8 Gem :: LoadError适用于mysql2 gem [英] Ruby on Rails 4.1.8 Gem::LoadError for mysql2 gem
本文介绍了Ruby on Rails 4.1.8 Gem :: LoadError适用于mysql2 gem的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我选择了一个用 Ruby 2.1.3 和 Rails 4.1.8 编写的已有4年历史的项目.
I picked up a 4 year old project written in Ruby 2.1.3 and Rails 4.1.8.
很少有gem被版本控制，但是我设法通过安装 mysql2 0.3.20 来使项目在本地运行，如在其他多个线程中所建议的那样.这样做需要我(在MacOS上)使用 brew install mysql @ 57 和 brew install openssl @ 10 降级openssl和mysql.
Very few of the gems were versioned but I've managed to get the project running locally by installing mysql2 0.3.20 as suggested in multiple other threads. Doing this required me to (on MacOS) downgrade openssl and mysql with brew install mysql@57 and brew install openssl@10.
然后我可以通过将正确的库传递给它来安装 mysql2 : gem install mysql2 -v 0.3.20---with-mysql-config=/usr/local/opt/mysql@5.7/bin/mysql_config --with-ldflags = -L/usr/local/opt/openssl@1.0/lib --with-cppflags=-I/usr/local/opt/openssl@1.0/include
I could then install mysql2 with by passing the correct libraries to it:
gem install mysql2 -v 0.3.20 -- --with-mysql-config=/usr/local/opt/mysql@5.7/bin/mysql_config --with-ldflags=-L/usr/local/opt/openssl@1.0/lib --with-cppflags=-I/usr/local/opt/openssl@1.0/include
一切都在本地工作，一切都很好.
Everything works locally, all good.
我正在尝试在Debian实例上使用Dokku部署此项目.这是从推送到dokku主服务器的信息，包括启动Rails服务器时引发的错误:
I'm trying to deploy this project with Dokku on a Debian instance. Here's the readout from the push to dokku master including the error thrown when starting the Rails server:
Dev@Jordans-MacBook-Pro ~/runritewinDB2020 (master) $ git push dokku master
Enumerating objects: 1608, done.
Counting objects: 100% (1608/1608), done.
Delta compression using up to 4 threads
Compressing objects: 100% (975/975), done.
Writing objects: 100% (1608/1608), 14.90 MiB | 1.19 MiB/s, done.
Total 1608 (delta 611), reused 1520 (delta 554)
remote: Resolving deltas: 100% (611/611), done.
-----> Cleaning up...
-----> Building runrite from dockerfile...
remote: build context to Docker daemon 51.88MB
Step 1/17 : FROM ruby:2.1.3
---> e1f10119c75a
Step 2/17 : RUN apt-get install -y libpq-dev
---> Using cache
---> 18e44db81b01
Step 3/17 : RUN apt-get install -y libxml2-dev libxslt1-dev
---> Using cache
---> b753197bec2f
Step 4/17 : ENV RAILS_ENV production
---> Using cache
---> fe632f7c4b4f
Step 5/17 : ENV RACK_ENV production
---> Using cache
---> ebeb94b2a120
Step 6/17 : ENV RACK production
---> Using cache
---> 98942a7c066f
Step 7/17 : ENV DB_URL mysql://mysql:f7a080fdf10779b0@dokku-mysql-runrite-production:3306/runrite_production
---> Using cache
---> 0feff73f3952
Step 8/17 : ENV APP_HOME /myapp
---> Using cache
---> 472864c3692a
Step 9/17 : RUN mkdir $APP_HOME
---> Using cache
---> 8cf938f4771b
Step 10/17 : WORKDIR $APP_HOME
---> Using cache
---> 83c835ef8ba6
Step 11/17 : ADD Gemfile* $APP_HOME/
---> 687cafb12ca9
Step 12/17 : RUN bundle install
---> Running in df7a7d1b74a3
Don't run Bundler as root. Bundler can ask for sudo if it is needed, and
installing your bundle as root will break this application for all non-root
users on this machine.
Fetching source index from https://rubygems.org/
Fetching git://github.com/activerecord-hackery/polyamorous.git
Fetching git://github.com/activeadmin/activeadmin.git
Fetching https://github.com/stripe/stripe-ruby
Installing rake 10.4.2
Installing CFPropertyList 2.2.8
Installing i18n 0.7.0
Installing json 1.8.3
Installing minitest 5.8.0
Installing thread_safe 0.3.5
Installing tzinfo 1.2.2
Installing activesupport 4.1.8
Installing builder 3.2.2
Installing erubis 2.7.0
Installing actionview 4.1.8
Installing rack 1.5.5
Installing rack-test 0.6.3
Installing actionpack 4.1.8
Installing mime-types 2.6.1
Installing mail 2.6.3
Installing actionmailer 4.1.8
Installing activemodel 4.1.8
Installing active_model_serializers 0.9.0
Installing arbre 1.0.3
Installing sass 3.2.19
Installing thor 0.19.1
Installing bourbon 3.2.4
Installing coffee-script-source 1.9.1.1
Installing execjs 2.6.0
Installing coffee-script 2.4.1
Installing railties 4.1.8
Installing coffee-rails 4.0.1
Installing formtastic 3.1.3
Installing formtastic_i18n 0.4.1
Installing has_scope 0.6.0
Installing responders 1.1.2
Installing inherited_resources 1.6.0
Installing jquery-rails 3.1.3
Installing jquery-ui-rails 5.0.5
Installing kaminari 0.16.3
Installing arel 5.0.1.20140414130214
Installing activerecord 4.1.8
Using bundler 1.7.4
Installing hike 1.2.3
Installing multi_json 1.11.2
Installing tilt 1.4.1
Installing sprockets 2.12.4
Installing sprockets-rails 2.3.2
Installing rails 4.1.8
Using polyamorous 1.3.3 from git://github.com/activerecord-hackery/polyamorous.git (at master)
Installing ransack 1.7.0
Installing sass-rails 4.0.5
Using activeadmin 1.0.0.pre1 from git://github.com/activeadmin/activeadmin.git (at master)
Installing addressable 2.3.6
Installing multipart-post 2.0.0
Installing avocado-docs 3.0.7
Installing mini_portile 0.6.0
Installing nokogiri 1.6.3.1
Installing aws-sdk-v1 1.56.0
Installing aws-sdk 1.56.0
Installing bcrypt 3.1.7
Installing coderay 1.1.0
Installing better_errors 2.0.0
Installing debug_inspector 0.0.2
Installing binding_of_caller 0.7.2
Installing columnize 0.8.9
Installing debugger-linecache 1.2.0
Installing slop 3.6.0
Installing byebug 3.5.1
Installing cancancan 1.9.2
Installing colorize 0.7.7
Installing net-ssh 2.9.2
Installing net-scp 1.2.1
Installing sshkit 1.7.1
Installing capistrano 3.4.0
Installing capistrano-bundler 1.1.3
Installing capistrano-rails 1.1.2
Installing capistrano-rbenv 2.0.2
Installing capistrano3-unicorn 0.2.1
Installing xpath 2.0.0
Installing capybara 2.4.4
Installing carrierwave 0.10.0
Installing streamio-ffmpeg 1.0.0
Installing carrierwave-video 0.5.6
Installing hitimes 1.2.2
Installing timers 4.0.1
Installing celluloid 0.16.0
Installing chartkick 1.3.2
Installing commonjs 0.2.7
Installing safe_yaml 1.0.4
Installing crack 0.4.2
Installing css_parser 1.3.7
Installing database_cleaner 1.3.0
Installing orm_adapter 0.5.0
Installing warden 1.2.3
Installing devise 3.4.0
Installing devise_invitable 1.4.1
Installing interception 0.5
Installing did_you_mean 0.9.6
Installing diff-lcs 1.2.5
Installing docile 1.1.5
Installing unf_ext 0.0.7.1
Installing unf 0.1.4
Installing domain_name 0.5.24
Installing launchy 2.4.2
Installing email_spec 1.6.0
Installing enumerize 0.9.0
Installing exception_notification 4.1.1
Installing excon 0.42.1
Installing fabrication 2.11.3
Installing faker 1.4.3
Installing faraday 0.9.0
Installing faraday_middleware 0.9.1
Installing ffi 1.9.6
Installing figaro 1.0.0
Installing fission 0.5.0
Installing formatador 0.2.5
Installing fog-core 1.27.2
Installing fog-xml 0.1.1
Installing fog-atmos 0.1.0
Installing fog-json 1.0.0
Installing inflecto 0.0.2
Installing fog-brightbox 0.7.1
Installing fog-ecloud 0.0.2
Installing fog-profitbricks 0.0.1
Installing fog-radosgw 0.0.3
Installing fog-sakuracloud 0.1.1
Installing fog-softlayer 0.3.25
Installing fog-storm_on_demand 0.1.0
Installing fog-terremark 0.0.3
Installing fog-vmfusion 0.0.1
Installing fog-voxel 0.0.2
Installing ipaddress 0.8.0
Installing fog 1.26.0
Installing font-awesome-rails 4.2.0.0
Installing rb-fsevent 0.9.4
Installing rb-inotify 0.9.5
Installing listen 2.7.11
Installing lumberjack 1.0.9
Installing method_source 0.8.2
Installing pry 0.10.1
Installing guard 2.6.1
Installing guard-bundler 2.0.0
Installing guard-rails 0.6.0
Installing rspec-support 3.1.2
Installing rspec-core 3.1.7
Installing rspec-expectations 3.1.2
Installing rspec-mocks 3.1.3
Installing rspec 3.1.0
Installing guard-rspec 4.3.1
Installing hashie 3.3.1
Installing htmlentities 4.3.4
Installing http-cookie 1.0.2
Installing multi_xml 0.5.5
Installing httparty 0.13.1
Installing jbuilder 2.2.3
Installing jwt 1.0.0
Installing kgio 2.9.2
Installing less 2.6.0
Installing less-rails 2.6.0
Installing libv8 3.16.14.7
Installing mysql2 0.3.20
Installing netrc 0.10.3
Installing oauth 0.4.7
Installing oauth2 1.0.0
Installing omniauth 1.2.2
Installing omniauth-oauth2 1.2.0
Installing omniauth-facebook 2.0.0
Installing omniauth-oauth 1.0.1
Installing omniauth-twitter 1.1.0
Installing owlcarousel-rails 1.1.3.3
Installing paper_trail 3.0.6
Installing premailer 1.8.6
Installing premailer-rails 1.8.2
Installing pry-byebug 2.0.0
Installing pry-rails 0.3.2
Installing puma 2.13.3
Installing pundit 0.3.0
Installing pushmeup 0.3.0
Installing rails-observers 0.1.2
Installing raindrops 0.13.0
Installing rb-fchange 0.0.6
Installing ref 1.0.5
Installing rest-client 1.8.0
Installing rmagick 2.15.0
Installing rspec-rails 3.1.0
Installing shoulda-context 1.2.1
Installing shoulda-matchers 2.7.0
Installing shoulda 3.5.0
Installing simple_form 3.1.0
Installing simplecov-html 0.8.0
Installing simplecov 0.9.1
Installing spring 1.1.3
Using stripe 1.26.0 from https://github.com/stripe/stripe-ruby (at master)
Installing therubyracer 0.12.1
Installing twitter-bootstrap-rails 3.2.0
Installing uglifier 2.5.3
Installing unicorn 4.8.3
Installing webmock 1.19.0
Installing yarjuf 2.0.0
Your bundle is complete!
It was installed into /usr/local/bundle
Post-install message from capistrano:
Capistrano 3.1 has some breaking changes. Please check the CHANGELOG: #Edited for shortened URL
If you're upgrading Capistrano from 2.x, we recommend to read the upgrade guide: # Remove shortened URL
The `deploy:restart` hook for passenger applications is now in a separate gem called capistrano-passenger. Just add it to your Gemfile and require it in your Capfile.
Post-install message from httparty:
When you HTTParty, you must party hard!
Post-install message from twitter-bootstrap-rails:
Important: You may need to add a javascript runtime to your Gemfile in order for bootstrap's LESS files to compile to CSS.
**********************************************
ExecJS supports these runtimes:
therubyracer - Google V8 embedded within Ruby
therubyrhino - Mozilla Rhino embedded within JRuby
Node.js
Apple JavaScriptCore - Included with Mac OS X
Microsoft Windows Script Host (JScript)
**********************************************
Removing intermediate container df7a7d1b74a3
---> cab4f5704fc6
Step 13/17 : ADD . $APP_HOME
---> ffda2dba11f3
Step 14/17 : RUN bundle exec rails server
---> Running in 3079acec1dac
=> Booting Puma
=> Rails 4.1.8 application starting in production on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
=> Notice: server is listening on all interfaces (0.0.0.0). Consider using 127.0.0.1 (--binding option)
=> Ctrl-C to shutdown server
Exiting
/usr/local/bundle/gems/activerecord-4.1.8/lib/active_record/connection_adapters/connection_specification.rb:190:in `rescue in spec': Specified 'mysql' for database adapter, but the gem is not loaded. Add `gem 'mysql'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord). (Gem::LoadError)
remote: from /usr/local/bundle/gems/activerecord-4.1.8/lib/active_record/connection_adapters/connection_specification.rb:187:in `spec'
remote: from /usr/local/bundle/gems/activerecord-4.1.8/lib/active_record/connection_handling.rb:50:in `establish_connection'
remote: from /usr/local/bundle/gems/activerecord-4.1.8/lib/active_record/railtie.rb:129:in `block (2 levels) in <class:Railtie>'
remote: from /usr/local/bundle/gems/activesupport-4.1.8/lib/active_support/lazy_load_hooks.rb:38:in `instance_eval'
remote: from /usr/local/bundle/gems/activesupport-4.1.8/lib/active_support/lazy_load_hooks.rb:38:in `execute_hook'
remote: from /usr/local/bundle/gems/activesupport-4.1.8/lib/active_support/lazy_load_hooks.rb:28:in `block in on_load'
remote: from /usr/local/bundle/gems/activesupport-4.1.8/lib/active_support/lazy_load_hooks.rb:27:in `each'
remote: from /usr/local/bundle/gems/activesupport-4.1.8/lib/active_support/lazy_load_hooks.rb:27:in `on_load'
remote: from /usr/local/bundle/gems/activerecord-4.1.8/lib/active_record/railtie.rb:118:in `block in <class:Railtie>'
remote: from /usr/local/bundle/gems/railties-4.1.8/lib/rails/initializable.rb:30:in `instance_exec'
remote: from /usr/local/bundle/gems/railties-4.1.8/lib/rails/initializable.rb:30:in `run'
remote: from /usr/local/bundle/gems/railties-4.1.8/lib/rails/initializable.rb:55:in `block in run_initializers'
remote: from /usr/local/lib/ruby/2.1.0/tsort.rb:226:in `block in tsort_each'
remote: from /usr/local/lib/ruby/2.1.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component'
remote: from /usr/local/lib/ruby/2.1.0/tsort.rb:427:in `each_strongly_connected_component_from'
remote: from /usr/local/lib/ruby/2.1.0/tsort.rb:347:in `block in each_strongly_connected_component'
remote: from /usr/local/lib/ruby/2.1.0/tsort.rb:345:in `each'
remote: from /usr/local/lib/ruby/2.1.0/tsort.rb:345:in `call'
remote: from /usr/local/lib/ruby/2.1.0/tsort.rb:345:in `each_strongly_connected_component'
remote: from /usr/local/lib/ruby/2.1.0/tsort.rb:224:in `tsort_each'
remote: from /usr/local/lib/ruby/2.1.0/tsort.rb:205:in `tsort_each'
remote: from /usr/local/bundle/gems/railties-4.1.8/lib/rails/initializable.rb:54:in `run_initializers'
remote: from /usr/local/bundle/gems/railties-4.1.8/lib/rails/application.rb:300:in `initialize!'
remote: from /myapp/config/environment.rb:5:in `<top (required)>'
remote: from /usr/local/bundle/gems/activesupport-4.1.8/lib/active_support/dependencies.rb:247:in `require'
remote: from /usr/local/bundle/gems/activesupport-4.1.8/lib/active_support/dependencies.rb:247:in `block in require'
remote: from /usr/local/bundle/gems/activesupport-4.1.8/lib/active_support/dependencies.rb:232:in `load_dependency'
remote: from /usr/local/bundle/gems/activesupport-4.1.8/lib/active_support/dependencies.rb:247:in `require'
remote: from /myapp/config.ru:3:in `block in <main>'
remote: from /usr/local/bundle/gems/rack-1.5.5/lib/rack/builder.rb:55:in `instance_eval'
remote: from /usr/local/bundle/gems/rack-1.5.5/lib/rack/builder.rb:55:in `initialize'
remote: from /myapp/config.ru:in `new'
remote: from /myapp/config.ru:in `<main>'
remote: from /usr/local/bundle/gems/rack-1.5.5/lib/rack/builder.rb:49:in `eval'
remote: from /usr/local/bundle/gems/rack-1.5.5/lib/rack/builder.rb:49:in `new_from_string'
remote: from /usr/local/bundle/gems/rack-1.5.5/lib/rack/builder.rb:40:in `parse_file'
remote: from /usr/local/bundle/gems/rack-1.5.5/lib/rack/server.rb:277:in `build_app_and_options_from_config'
remote: from /usr/local/bundle/gems/rack-1.5.5/lib/rack/server.rb:199:in `app'
remote: from /usr/local/bundle/gems/railties-4.1.8/lib/rails/commands/server.rb:50:in `app'
remote: from /usr/local/bundle/gems/rack-1.5.5/lib/rack/server.rb:314:in `wrapped_app'
remote: from /usr/local/bundle/gems/rack-1.5.5/lib/rack/server.rb:250:in `start'
remote: from /usr/local/bundle/gems/railties-4.1.8/lib/rails/commands/server.rb:69:in `start'
remote: from /usr/local/bundle/gems/railties-4.1.8/lib/rails/commands/commands_tasks.rb:81:in `block in server'
remote: from /usr/local/bundle/gems/railties-4.1.8/lib/rails/commands/commands_tasks.rb:76:in `tap'
remote: from /usr/local/bundle/gems/railties-4.1.8/lib/rails/commands/commands_tasks.rb:76:in `server'
remote: from /usr/local/bundle/gems/railties-4.1.8/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
remote: from /usr/local/bundle/gems/railties-4.1.8/lib/rails/commands.rb:17:in `<top (required)>'
remote: from bin/rails:4:in `require'
remote: from bin/rails:4:in `<main>'
remote: The command '/bin/sh -c bundle exec rails server' returned a non-zero code: 1
Dockerfile:
Dockerfile:
FROM ruby:2.1.3
RUN apt-get install -y libpq-dev
RUN apt-get install -y libxml2-dev libxslt1-dev
ENV RAILS_ENV production
ENV RACK_ENV production
ENV RACK production
ENV DB_URL mysql://mysql:f7a080fdf10779b0@dokku-mysql-runrite-production:3306/runrite_production
# for a JS runtime
RUN apt-get install -y nodejs
ENV APP_HOME /myapp
RUN mkdir $APP_HOME
WORKDIR $APP_HOME
ADD Gemfile* $APP_HOME/
RUN bundle install
ADD . $APP_HOME
RUN bundle exec rails server
database.yml:
database.yml:
development:
adapter: mysql2
database: runrite-web_development
username: root
password:
host: localhost
socket: /tmp/mysql.sock
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
adapter: mysql2
database: db/runrite-web_test.sql
username: root
password:
host: localhost
socket: /tmp/mysql.sock
timeout: 10000
production: &production
adapter: mysql2
encoding: utf8mb4
charset: utf8mb4
collation: utf8mb4_unicode_ci
port: 3306
database: runrite_production
url: <%= ENV['DB_URL'] %>
pool: 25
staging:
<<: *production
宝石文件:
source 'https://rubygems.org'
ruby '2.1.3'
# TODO: put versions on most of these gems
# Core
gem 'rails', '4.1.8'
gem 'mysql2', '0.3.20'
# gem 'mysql'
# Deployment
gem 'capistrano', '~> 3.4.0', require: false
gem 'capistrano-rbenv', '~> 2.0'
gem 'capistrano-rails', '~> 1.1', require: false
gem 'capistrano-bundler', '~> 1.1', require: false
gem 'capistrano3-unicorn', require: false
gem "active_model_serializers"
gem "activeadmin", github: 'activeadmin'
gem "avocado-docs"
gem "aws-sdk"
# gem 'aws-healthcheck'
gem "cancancan"
gem "carrierwave"
gem "carrierwave-video"
gem "devise"
gem "devise_invitable"
gem 'enumerize'
gem "faraday"
gem "faraday_middleware"
gem 'fog'
gem 'font-awesome-rails'
gem "has_scope"
gem 'rmagick'
# gem 'mini_magick'
# gem 'imagemagick-binaries'
gem "omniauth"
gem "omniauth-facebook"
gem "omniauth-twitter"
gem "paper_trail"
gem "polyamorous", github: "activerecord-hackery/polyamorous"
gem "pundit"
gem "pushmeup"
gem "rails-observers"
gem "responders"
gem "therubyracer"
gem "less-rails" #Sprockets (what Rails 3.1 uses for its asset pipeline) supports LESS
gem "twitter-bootstrap-rails"
gem 'coffee-rails', '~> 4.0.0'
gem 'figaro'
gem 'jbuilder', '~> 2.0'
gem 'jquery-rails'
gem 'sass-rails', '~> 4.0.3'
gem 'spring', group: :development
gem 'simple_form'
# gem 'turbolinks'
gem 'uglifier', '>= 1.3.0'
gem 'unicorn'
gem 'yarjuf'
gem 'owlcarousel-rails'
gem "chartkick"
gem 'premailer-rails'
gem 'nokogiri'
# E-Commerce
gem 'stripe', :git => 'https://github.com/stripe/stripe-ruby'
group :development, :test do
gem "rspec-rails"
gem 'pry-rails'
gem 'pry-byebug'
gem 'shoulda'
gem 'did_you_mean', '~> 0.9.4'
gem "guard"
gem "guard-rspec"
end
group :test do
gem "capybara"
gem "fabrication"
gem "database_cleaner"
gem "email_spec"
gem 'simplecov', require: false
gem 'webmock'
# gem 'capybara-webkit'
gem "faker"
end
group :development do
gem "puma", '~> 2.13.3'
gem "better_errors"
gem "binding_of_caller"
gem "guard-bundler"
gem "guard-rails"
gem "rb-fchange", require: false
gem "rb-fsevent", require: false
gem "rb-inotify", require: false
end
group :production do
# gem 'logglier', '~> 0.2.11' # sending logs to loggly.com
# gem 'lograge', '~> 0.3.4' # abbreviated rails logs
gem 'exception_notification', '~> 4.1.1' # notification of exceptions via email
end
# gem 'elbas', github: 'lserman/capistrano-elbas'
Debian实例信息:
Debian instance info:
Static hostname: debian-1cpu-1gb-us-chi1
Icon name: computer-vm
Chassis: vm
Machine ID: 0072a07a9c1349898ba2e35eb78cd8d2
Boot ID: bfb5d8b9d8cf42d4b766b5089a926016
Virtualization: kvm
Operating System: Debian GNU/Linux 10 (buster)
Kernel: Linux 4.19.0-9-amd64
Architecture: x86-64
OpenSSL版本:
OpenSSL version:
OpenSSL 1.1.1d 10 Sep 2019
Dokku MYSQL插件MYSQL版本:
Dokku MYSQL plugin MYSQL version:
5.7.28
我在想我需要弄清楚如何在debian实例上使用openSSL的正确版本来构建mysql2 gem，但是我对如何做到这一点有些困惑.mysql2 gem install在本地爆炸，直到我使用顶部提到的可选参数安装了它.mysql2 gem版本可以在debian实例上很好地安装.任何帮助将不胜感激.
I'm thinking I need to figure out how to build the mysql2 gem with the correct version of openSSL on the debian instance but I'm at a bit of a loss on how I would do that. The mysql2 gem install blew up locally until I installed it with the optional arguments mentioned at the top. The mysql2 gem version installs fine on the debian instance. Any help would be appreciated.
推荐答案
我想我知道发生了什么事.在您的Dockerfile中，将您的DB_URL从:mysql://更改为mysql2://
I think I see what's going on. In your Dockerfile, change your DB_URL from: mysql:// to mysql2://
您正在加载mysql2 gem，但向ActiveRecord指示您要使用通过mysql gem的连接.
You are loading the mysql2 gem, but indicating to ActiveRecord that you want to use a connection via the mysql gem.
这篇关于Ruby on Rails 4.1.8 Gem :: LoadError适用于mysql2 gem的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
