MySQLproblem - RAILS_ENV =生产包exec rake db：migrate

由于detailed manual，我只是将redmine安装到我的服务器。一切都很好，但最后一步失败了一些错误，我不知道如何解决它。MySQLproblem - RAILS_ENV =生产包exec rake db：migrate

命令是

RAILS_ENV=production bundle exec rake db:migrate

输出错误

You cannot specify the same gem twice with different version requirements. 
You specified: mysql (>= 0) and mysql (~> 2.9.1)

宝石列表

*** LOCAL GEMS *** 

actionmailer (3.2.15) 
actionpack (3.2.15) 
activemodel (3.2.15) 
activerecord (3.2.15) 
activeresource (3.2.15) 
activesupport (3.2.15) 
arel (3.0.3) 
bigdecimal (1.2.0) 
builder (3.0.0) 
bundler (1.3.5) 
capybara (2.1.0) 
childprocess (0.3.9) 
coderay (1.1.0) 
daemon_controller (1.1.7) 
database_cleaner (1.2.0) 
erubis (2.7.0) 
ffi (1.9.3) 
hike (1.2.3) 
hoe (3.7.1) 
i18n (0.6.4) 
io-console (0.4.2) 
journey (1.0.4) 
jquery-rails (2.0.3) 
json (1.8.1, 1.7.7) 
mail (2.5.4) 
metaclass (0.0.1) 
mime-types (1.25.1) 
mini_portile (0.5.2) 
minitest (4.3.2) 
mocha (0.14.0) 
multi_json (1.8.2) 
mysql (2.9.1) 
net-ldap (0.3.1) 
nokogiri (1.6.0) 
passenger (4.0.25) 
polyglot (0.3.3) 
psych (2.0.0) 
rack (1.5.2, 1.4.5) 
rack-cache (1.2) 
rack-openid (1.4.1) 
rack-ssl (1.3.3) 
rack-test (0.6.2) 
rails (3.2.15) 
railties (3.2.15) 
rake (0.9.6, 0.8.7) 
rdoc (4.0.0, 3.12.2) 
RedCloth (4.2.9) 
rmagick (2.13.2) 
ruby-openid (2.3.0) 
rubygems-update (2.1.11) 
rubytree (0.5.2) 
rubyzip (1.0.0) 
selenium-webdriver (2.37.0) 
shoulda (3.3.2) 
shoulda-context (1.0.2) 
shoulda-matchers (1.4.1) 
sprockets (2.2.2) 
test-unit (2.0.0.0) 
thor (0.18.1) 
tilt (1.4.1) 
treetop (1.4.15) 
tzinfo (0.3.38) 
websocket (1.0.7) 
xpath (2.0.0) 
yard (0.8.7.3)

的Gemfile

source 'https://rubygems.org' 

    gem "rake", "0.8.7" 
    gem "rack", "1.4.5" 
    gem "i18n", "0.6.4" 
    gem "rubytree", "0.5.2", :require => "tree" 
    gem "RedCloth", "~>4.2.3", :require => "redcloth" # for CodeRay 
    gem "mysql" 

    gem "rails", "3.2.15" 
    gem "jquery-rails", "~> 2.0.2" 
    gem "coderay", "~> 1.1.0" 
    gem "fastercsv", "~> 1.5.0", :platforms => [:mri_18, :mingw_18, :jruby] 
    gem "builder", "3.0.0" 

    # Optional gem for LDAP authentication 
    group :ldap do 
     gem "net-ldap", "~> 0.3.1" 
    end 

    # Optional gem for OpenID authentication 
    group :openid do 
     gem "ruby-openid", "~> 2.3.0", :require => "openid" 
     gem "rack-openid" 
    end 

    # Optional gem for exporting the gantt to a PNG file, not supported with jruby 
    platforms :mri, :mingw do 
     group :rmagick do 
     # RMagick 2 supports ruby 1.9 
     # RMagick 1 would be fine for ruby 1.8 but Bundler does not support 
     # different requirements for the same gem on different platforms 
     gem "rmagick", ">= 2.0.0" 
     end 
    end 

    platforms :jruby do 
     # jruby-openssl is bundled with JRuby 1.7.0 
     gem "jruby-openssl" if Object.const_defined?(:JRUBY_VERSION) && JRUBY_VERSION < '1.7.0' 
     gem "activerecord-jdbc-adapter", "~> 1.3.2" 
    end 

    # Include database gems for the adapters found in the database 
    # configuration file 
    require 'erb' 
    require 'yaml' 
    database_file = File.join(File.dirname(__FILE__), "config/database.yml") 
    if File.exist?(database_file) 

    database_config = YAML::load(ERB.new(IO.read(database_file)).result) 
    adapters = database_config.values.map {|c| c['adapter']}.compact.uniq 
    if adapters.any? 

    adapters.each do |adapter| 
     case adapter 
     when 'mysql2' 
     gem "mysql2", "~> 0.3.11", :platforms => [:mri, :mingw] 
     gem "activerecord-jdbcmysql-adapter", :platforms => :jruby 
     when 'mysql' 
     gem "mysql", "~>2.9.1", :platforms => [:mri, :mingw] 
     gem "activerecord-jdbcmysql-adapter", :platforms => :jruby 
     when /postgresql/ 
     gem "pg", ">= 0.11.0", :platforms => [:mri, :mingw] 
     gem "activerecord-jdbcpostgresql-adapter", :platforms => :jruby 
     when /sqlite3/ 
     gem "sqlite3", :platforms => [:mri, :mingw] 
     gem "activerecord-jdbcsqlite3-adapter", :platforms => :jruby 
     when /sqlserver/ 
     gem "tiny_tds", "~> 0.5.1", :platforms => [:mri, :mingw] 
     gem "activerecord-sqlserver-adapter", :platforms => [:mri, :mingw] 
     else 
     warn("Unknown database adapter `#{adapter}` found in config/database.yml, use 

    Gemfile.local to load your own database gems") 
      end 
     end 
     else 
     warn("No adapter found in config/database.yml, please configure it first") 
     end 
    else 
     warn("Please configure your config/database.yml first") 
    end 

    group :development do 
     gem "rdoc", ">= 2.4.2" 
     gem "yard" 
    end 

    group :test do 
     gem "shoulda", "~> 3.3.2" 
     gem "mocha", ">= 0.14", :require => 'mocha/api' 
     if RUBY_VERSION >= '1.9.3' 
     gem "capybara", "~> 2.1.0" 
     gem "selenium-webdriver" 
     gem "database_cleaner" 
     end 
    end 

    local_gemfile = File.join(File.dirname(__FILE__), "Gemfile.local") 
    if File.exists?(local_gemfile) 
     puts "Loading Gemfile.local ..." if $DEBUG # `ruby -d` or `bundle -v` 
     instance_eval File.read(local_gemfile) 
    end 

    # Load plugins' Gemfiles 
    Dir.glob File.expand_path("../plugins/*/Gemfile", __FILE__) do |file| 
     puts "Loading #{file} ..." if $DEBUG # `ruby -d` or `bundle -v` 
     #TODO: switch to "eval_gemfile file" when bundler >= 1.2.0 will be required (rails 4) 
     instance_eval File.read(file), file 
    end

谢谢你的回答。

尼斯一天月

来源

2013-11-27 Jan Motyčák

当您循环访问Gemfile中的adapters时，您似乎包含mysql宝石。你应该很好去，一旦你从你的Gemfile删除以下行：

gem "rake", "0.8.7" 
gem "rack", "1.4.5" 
gem "i18n", "0.6.4" 
gem "rubytree", "0.5.2", :require => "tree" 
gem "RedCloth", "~>4.2.3", :require => "redcloth" # for CodeRay 
gem "mysql" # <---------------- Remove this line.

来源

2013-11-27 12:26:03 vee

不错，thx很好。真是愚蠢的错误。 –

删除，因为DB的宝石都包括全自动根据您使用的适配器上您的Gemfile的第8行第一个gem "mysql"。然后再次运行bundle并重试。

来源

2013-11-27 12:25:40 davidb

错误信息非常清楚。你有多个地方的MySQL宝石。一个在案件声明顶部和一个

来源

2013-11-27 12:25:54 Santhosh

MySQLproblem - RAILS_ENV =生产包exec rake db：migrate

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