MySQLproblem - RAILS_ENV=production bundle exec rake db:migrate

Question

I am just installing the redmine to my server due to detailed manual. Everything gone fine but one of the last step fail with some bug and I have no idea how to fix it.

Command is

RAILS_ENV=production bundle exec rake db:migrate

Output error

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

gem list

*** 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)

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

Thank you for any answer.

Nice day Jan

Answer 1

You seem to be including the mysql gem when you loop through the adapters in your Gemfile. You should be good to go once you remove the following line from your Gemfile:

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.

Answer 2

Remove the first gem "mysql" on line 8 of your gemfile because the db gems are included automaticly based on which adapter your using. Then run bundle again and retry.