耙db：migrate期间出错

Question

I have been trying to upgrade my app from Rails 2.3 to Rails 3. I got the rails s to work with no errors but nothing will come up because I have not migrated the db. There has been numerous errors I have fixed trying to run rake db:migrate but I cannot get past this...

rake aborted!
no such file to load -- config/environment

(See full trace by running task with --trace)

my config environment is

#Load the rails application
require File.expand_path('../application', __FILE__)

# Initialize the rails application
AppName::Application.initialize!

with trace

    rake aborted!
    no such file to load -- config/environment
   /Users/Kyle/Desktop/Rails_Projects/unitedaction3/lib/tasks/account.rake:2:in `require'
   /Users/Kyle/Desktop/Rails_Projects/unitedaction3/lib/tasks/account.rake:2:in `<top     (required)>'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.0/lib/rails/engine.rb:131:in `load'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.0/lib/rails/engine.rb:131:in `block in     load_tasks'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.0/lib/rails/engine.rb:131:in `each'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.0/lib/rails/engine.rb:131:in `load_tasks'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.0/lib/rails/application.rb:141:in   `load_tasks'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.0.0/lib/rails/application.rb:77:in `method_missing'
   /Users/Kyle/Desktop/Rails_Projects/unitedaction3/Rakefile:9:in `<top (required)>'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/rake_module.rb:25:in `load'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/rake_module.rb:25:in `load_rakefile'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:495:in `raw_load_rakefile'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:78:in `block in   load_rakefile'
  /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:77:in `load_rakefile'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:61:in `block in run'
    /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/lib/rake/application.rb:59:in `run'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/gems/rake-0.9.2/bin/rake:32:in `<top (required)>'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in `load'
   /Users/Kyle/.rvm/gems/ruby-1.9.2-p290/bin/rake:19:in `<main>'

Any ideas?

Answer 1

I'm not sure if you have seen this but there is a rails plugin that provides rake tasks to help with this upgrade: https://github.com/rails/rails_upgrade

It gives you:

rake rails:upgrade:check
rake rails:upgrade:configuration

But I think what you will need to end up doing is generate a new empty rails 3 app and copy the generated config/environment file into your app.