Run `rake spec`, `rake spec:models`, `rake spec:controllers`, etc without running prerequisite tasks. Helpful for working with non-migration-aware (i.e., legacy databases).

rspec.rake

# Run `rake spec`, `rake spec:models`, `rake spec:controllers`, etc 
# without running prerequisite, database tasks. Helpful for working 
# with non-migration-aware, legacy databases.
if defined?(RSpec)

  tasks = %w{ spec models controllers helpers lib mailers 
    rcov requests routing views }

  skip_db_task = Proc.new do |task|
    path = task.eql?('spec') ? 'spec/**' : "spec/#{task}"
    RSpec::Core::RakeTask.new("#{task}_skips_db_tasks") do |t|
      old_env, ENV['RAILS_ENV'] = ENV['RAILS_ENV'], 'test'
      t.pattern = "#{path}/*_spec.rb"
      p t.pattern
      ENV['RAILS_ENV'] = old_env
    end
  end
  
  namespace :spec do
    tasks.each {|task| skip_db_task.call(task) } 
  end

  tasks.each do |task|
    namespace = 'spec'
    old_task = (namespace == task) ? 'spec' : "spec:#{task}"
    new_task = "spec:#{task}_skips_db_tasks"
    task(old_task).clear.enhance([new_task]) 
  end  

end