0.11.x: rake ar:schema:load results in "undefined method define for ActiveRecord::Schema:Class

[dannguyen]

Using:
Ruby 1.9.3-head
padrino 0.11.1
ActiveRecord 3.2.13
rake 10.0.4

The rake ar:migrate tasks work as expected, but I'm getting a bizarre error when I do rake ar:schema:load

  undefined method `define' for ActiveRecord::Schema:Class
  /home/project/db/schema.rb:14:in `<top (required)>'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:245:in `load'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:245:in `block in load'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:236:in `load_dependency'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/activesupport-3.2.13/lib/active_support/dependencies.rb:245:in `load'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/padrino-gen-0.11.0/lib/padrino-gen/padrino-tasks/activerecord.rb:247:in `block (3 levels) in <top (required)>'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/task.rb:246:in `call'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/task.rb:246:in `block in execute'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/task.rb:241:in `each'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/task.rb:241:in `execute'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/task.rb:184:in `block in invoke_with_call_chain'
  /home/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/task.rb:177:in `invoke_with_call_chain'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/task.rb:170:in `invoke'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/application.rb:143:in `invoke_task'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/application.rb:101:in `block (2 levels) in top_level'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/application.rb:101:in `each'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/application.rb:101:in `block in top_level'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/application.rb:110:in `run_with_threads'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/application.rb:95:in `top_level'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/application.rb:73:in `block in run'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/application.rb:160:in `standard_exception_handling'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/lib/rake/application.rb:70:in `run'
  /home/.rvm/gems/ruby-1.9.3-head@mta/gems/rake-10.0.4/bin/rake:33:in `<top (required)>'
  /home/.rvm/gems/ruby-1.9.3-head@mta/bin/rake:23:in `load'
  /home/.rvm/gems/ruby-1.9.3-head@mta/bin/rake:23:in `<main>'
  /home/.rvm/gems/ruby-1.9.3-head@mta/bin/ruby_noexec_wrapper:14:in `eval'
  /home/.rvm/gems/ruby-1.9.3-head@mta/bin/ruby_noexec_wrapper:14:in `<main>'
  Tasks: TOP => ar:schema:load

It doesn't make sense to me why define in ActiveRecord::Schema:Class would be undefined...when ActiveRecord::Schema (and all other parts of AR) seem to work as expected.

[rudywhip]

Had same issue. Traced to padrino-gen. Resolved by requiring active_record before PadrinoTasks.init in Rakefile.