rails rake task to override things. . .for legacy db where user does not have perms

gistfile1.rb

# since we are using a "legacy" schema, we don't want to drop db or tables.'
Rake::TaskManager.class_eval do
  def alias_task(fq_name)
    new_name = "#{fq_name}:original"
    @tasks[new_name] = @tasks.delete(fq_name)
  end
end

def alias_task(fq_name)
  Rake.application.alias_task(fq_name)
end

def override_task(*args, &block)
  name, params, deps = Rake.application.resolve_args(args.dup)
  fq_name = Rake.application.instance_variable_get(:@scope).dup.push(name).join(':')
  alias_task(fq_name)
  Rake::Task.define_task(*args, &block)
end

namespace :db do
    namespace :test do
        override_task :purge => :environment do
          puts ".... nada"
            #ActiveRecord::Migrator.migrate("db/migrate/", 0)
        end
    end

  namespace :schema do
    override_task :load => :environment do
        puts "should be loaded already."
    end
  end
end