Redmine

Please list your installed gems.
Are you using PostgreSQL?

I am not running postgreSQL. I am trying to use mysql. I had to install the headers to get the mysql gem to build. http://support.apple.com/kb/HT4006

• LOCAL GEMS ***

actionmailer (2.3.5, 2.2.2, 1.3.6)
actionpack (2.3.5, 2.2.2, 1.13.6)
actionwebservice (1.2.6)
activerecord (2.3.5, 2.2.2, 1.15.6)
activeresource (2.3.5, 2.2.2)
activesupport (2.3.5, 2.2.2, 1.4.4)
acts_as_ferret (0.4.4, 0.4.3)
capistrano (2.5.16, 2.5.2)
cgi_multipart_eof_fix (2.5.0)
daemons (1.0.10)
dnssd (1.3.1, 0.6.0)
fastthread (1.0.7, 1.0.1)
fcgi (0.8.8, 0.8.7)
ferret (0.11.6)
gem_plugin (0.2.3)
highline (1.5.2, 1.5.0)
hpricot (0.8.2, 0.6.164)
libxml-ruby (1.1.3, 1.1.2)
mongrel (1.1.5)
mysql (2.8.1)
needle (1.3.0)
net-scp (1.0.2, 1.0.1)
net-sftp (2.0.4, 2.0.1, 1.1.1)
net-ssh (2.0.20, 2.0.4, 1.1.4)
net-ssh-gateway (1.0.1, 1.0.0)
passenger (2.2.10)
rack (1.1.0, 1.0.1)
rails (2.3.5, 2.2.2, 1.2.6)
rake (0.8.7, 0.8.3)
RedCloth (4.2.2, 4.1.1)
ruby-openid (2.1.7, 2.1.2)
ruby-yadis (0.3.4)
rubygems-update (1.3.6)
rubynode (0.1.5)
sqlite3-ruby (1.2.5, 1.2.4)
termios (0.9.4)
xmpp4r (0.5, 0.4)

I think the gem works as well.

$ irb

require 'mysql'

=> true

I have the same problem.

here is the error trace

• Invoke db:migrate (first_time)
• Invoke environment (first_time)
• Execute environment
  rake aborted!
  Object is not missing constant Project!
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:417:in `load_missing_constant'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:80:in `const_missing_with_dependencies'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:92:in `const_missing'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:98:in `rescue in const_missing'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:95:in `const_missing'
  /usr/local/www/redmine-0.9.2/app/models/attachment.rb:36:in `<class:Attachment>'
  /usr/local/www/redmine-0.9.2/app/models/attachment.rb:20:in `<top (required)>'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:158:in `require'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:158:in `require'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:265:in `require_or_load'
  /usr/local/www/redmine-0.9.2/vendor/plugins/engines/lib/engines/rails_extensions/dependencies.rb:132:in `require_or_load_with_engine_additions'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:425:in `load_missing_constant'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:80:in `const_missing_with_dependencies'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:92:in `const_missing'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:437:in `load_missing_constant'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:80:in `const_missing_with_dependencies'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:437:in `load_missing_constant'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:80:in `const_missing_with_dependencies'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:437:in `load_missing_constant'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:80:in `const_missing_with_dependencies'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:437:in `load_missing_constant'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:80:in `const_missing_with_dependencies'
  /usr/local/www/redmine-0.9.2/vendor/plugins/acts_as_attachable/lib/acts_as_attachable.rb:33:in `acts_as_attachable'
  /usr/local/www/redmine-0.9.2/app/models/message.rb:22:in `<class:Message>'
  /usr/local/www/redmine-0.9.2/app/models/message.rb:18:in `<top (required)>'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:158:in `require'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:158:in `require'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:265:in `require_or_load'
  /usr/local/www/redmine-0.9.2/vendor/plugins/engines/lib/engines/rails_extensions/dependencies.rb:132:in `require_or_load_with_engine_additions'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:425:in `load_missing_constant'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:80:in `const_missing_with_dependencies'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:92:in `const_missing'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/inflector.rb:372:in `const_get'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/inflector.rb:372:in `block in constantize'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/inflector.rb:371:in `each'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/inflector.rb:371:in `constantize'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/core_ext/string/inflections.rb:162:in `constantize'
  /usr/local/www/redmine-0.9.2/vendor/rails/activerecord/lib/active_record/observer.rb:157:in `observed_class'
  /usr/local/www/redmine-0.9.2/vendor/rails/activerecord/lib/active_record/observer.rb:183:in `observed_classes'
  /usr/local/www/redmine-0.9.2/vendor/rails/activerecord/lib/active_record/observer.rb:166:in `initialize'
  /usr/local/lib/ruby/1.9.1/singleton.rb:109:in `new'
  /usr/local/lib/ruby/1.9.1/singleton.rb:109:in `block in instance'
  <internal:prelude>:8:in `synchronize'
  /usr/local/lib/ruby/1.9.1/singleton.rb:107:in `instance'
  /usr/local/www/redmine-0.9.2/vendor/rails/activerecord/lib/active_record/observer.rb:38:in `block in instantiate_observers'
  /usr/local/www/redmine-0.9.2/vendor/rails/activerecord/lib/active_record/observer.rb:36:in `each'
  /usr/local/www/redmine-0.9.2/vendor/rails/activerecord/lib/active_record/observer.rb:36:in `instantiate_observers'
  /usr/local/www/redmine-0.9.2/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:15:in `block in define_dispatcher_callbacks'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/callbacks.rb:182:in `call'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/callbacks.rb:182:in `evaluate_method'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/callbacks.rb:166:in `call'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/callbacks.rb:90:in `block in run'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/callbacks.rb:90:in `each'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/callbacks.rb:90:in `run'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/callbacks.rb:276:in `run_callbacks'
  /usr/local/www/redmine-0.9.2/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:51:in `run_prepare_callbacks'
  /usr/local/www/redmine-0.9.2/vendor/rails/railties/lib/initializer.rb:631:in `prepare_dispatcher'
  /usr/local/www/redmine-0.9.2/vendor/rails/railties/lib/initializer.rb:185:in `process'
  /usr/local/www/redmine-0.9.2/vendor/rails/railties/lib/initializer.rb:113:in `run'
  /usr/local/www/redmine-0.9.2/config/environment.rb:20:in `<top (required)>'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in `require'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in `block in require'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:521:in `new_constants_in'
  /usr/local/www/redmine-0.9.2/vendor/rails/activesupport/lib/active_support/dependencies.rb:156:in `require'
  /usr/local/www/redmine-0.9.2/vendor/rails/railties/lib/tasks/misc.rake:4:in `block in <top (required)>'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:636:in `call'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:636:in `block in execute'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:631:in `each'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:631:in `execute'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:597:in `block in invoke_with_call_chain'
  /usr/local/lib/ruby/1.9.1/monitor.rb:190:in `mon_synchronize'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:607:in `block in invoke_prerequisites'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:604:in `each'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:596:in `block in invoke_with_call_chain'
  /usr/local/lib/ruby/1.9.1/monitor.rb:190:in `mon_synchronize'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:583:in `invoke'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2029:in `block (2 levels) in top_level'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2029:in `each'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2029:in `block in top_level'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2001:in `block in run'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
  /usr/local/lib/ruby/gems/1.9.1/gems/rake-0.8.7/bin/rake:31:in `<top (required)>'
  /usr/local/bin/rake:19:in `load'
  /usr/local/bin/rake:19:in `<main>'

here is my env
GNU/linux x86_64
redmine 1.9.2
mysql-5.1.44-linux-x86_64-glibc23
ruby 1.9.1p376 (2009-12-07 revision 26041) [x86_64-linux]
rubygems 1.3.6
[portal@aci-dev redmine-0.9.2]$ gem list

• LOCAL GEMS ***

actionmailer (2.3.5, 2.3.2)
actionpack (2.3.5, 2.3.2)
activerecord (2.3.5, 2.3.2)
activeresource (2.3.5, 2.3.2)
activesupport (2.3.5, 2.3.2)
rack (1.1.0, 1.0.1)
rails (2.3.5, 2.3.2)
rake (0.8.7)

I have the same problem. Checking out the 0.9.2 tag from the repo doesn't have the issue however.

Deleting the vendored rails also seems to do the trick. Running with these local gems.

actionmailer (2.3.5, 2.0.2)
actionpack (2.3.5, 2.0.2)
activerecord (2.3.5, 2.0.2)
activeresource (2.3.5, 2.0.2)
activesupport (2.3.5, 2.0.2)
cgi_multipart_eof_fix (2.5.0)
daemons (1.0.10)
fastthread (1.0.7, 1.0.1)
gem_plugin (0.2.3)
mongrel (1.1.5)
pg (0.8.0)
rack (1.1.0, 1.0.1)
rails (2.3.5, 2.0.2)
rake (0.8.7, 0.8.1)
rmagick (2.12.2, 2.5.2)

which mysql version are you guys using ?

I am running the installed version MySQL Server version:
5.0.82-log Source distribution

I seem to have it running now using 0.9.2 but I've done so much else to the server that I am not sure what all has changed. I will going to re-install from scratch and post my results.

never mind has to downgrade mysql and dependencies. back to mysql 5.0.77, ruby 1.8.7 and mysql-ruby 2.7 ( 2.8.1 was giving 'No Definition for 'field_name' errors')
finally working setup
linux x86_64
redmine 1.9.2
mysql 5.0.77
ruby 1.8.7
gems 1.3.6

--gem list
actionmailer (2.3.5)
actionpack (2.3.5)
activerecord (2.3.5)
activeresource (2.3.5)
activesupport (2.3.5)
mysql (2.7)
rack (1.1.0, 1.0.1)
rails (2.3.5)
rake (0.8.7)

I just wanted to add my two cents to this discussion. I am using Snow Leopard 10.6.3, and I'm using the Ruby (1.8.7), Rails (2.3.5), and rake (0.8.7) that came with Xcode from Apple (whatever the latest version is at the time of this writing). I had been struggling to get rake db:migrate to work, but I would keep getting the, "Object is not missing constant Project!," error. My solution to this problem was to install the mysql (2.8.1) gem using the x86_64 architecture:

ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config

It seems that whatever magic that gem performs, it does it in an i386 way, which is incompatible with the 64-bit version of Ruby/Rails. Just a hunch, though. :)