Undo the actions performed by a generator. Rewind the action manifest and attempt to completely erase the results of each action.

Methods
C
D
F
M
R
T
Instance Public methods
complex_template(*args)

Source: show 

# File rails/railties/lib/rails_generator/commands.rb, line 472
def complex_template(*args)
  # nothing should be done here
end
directory(relative_path)

Remove each directory in the given path from right to left. Remove each subdirectory if it exists and is a directory.

Source: show 

# File rails/railties/lib/rails_generator/commands.rb, line 438
def directory(relative_path)
  parts = relative_path.split('/')
  until parts.empty?
    partial = File.join(parts)
    path = destination_path(partial)
    if File.exists?(path)
      if Dir[File.join(path, '*')].empty?
        logger.rmdir partial
        unless options[:pretend]
          if options[:svn]
            # If the directory has been marked to be added
            # but has not yet been checked in, revert and delete
            if options[:svn][relative_path]
              system("svn revert #{path}")
              FileUtils.rmdir(path)
            else
            # If the directory is not in the status list, it
            # has no modifications so we can simply remove it
              system("svn rm #{path}")
            end
          else
            FileUtils.rmdir(path)
          end
        end
      else
        logger.notempty partial
      end
    else
      logger.missing partial
    end
    parts.pop
  end
end
file(relative_source, relative_destination, file_options = {})

Remove a file if it exists and is a file.

Also aliased as: template

Source: show 

# File rails/railties/lib/rails_generator/commands.rb, line 406
def file(relative_source, relative_destination, file_options = {})
  destination = destination_path(relative_destination)
  if File.exists?(destination)
    logger.rm relative_destination
    unless options[:pretend]
      if options[:svn]
        # If the file has been marked to be added
        # but has not yet been checked in, revert and delete
        if options[:svn][relative_destination]
          system("svn revert #{destination}")
          FileUtils.rm(destination)
        else
        # If the directory is not in the status list, it
        # has no modifications so we can simply remove it
          system("svn rm #{destination}")
        end  
      else
        FileUtils.rm(destination)
      end
    end
  else
    logger.missing relative_destination
    return
  end
end
migration_template(relative_source, relative_destination, template_options = {})

When deleting a migration, it knows to delete every file named “[0-9]*_#{file_name}”.

Source: show 

# File rails/railties/lib/rails_generator/commands.rb, line 477
def migration_template(relative_source, relative_destination, template_options = {})
  migration_directory relative_destination

  migration_file_name = template_options[:migration_file_name] || file_name
  unless migration_exists?(migration_file_name)
    puts "There is no migration named #{migration_file_name}"
    return
  end


  existing_migrations(migration_file_name).each do |file_path|
    file(relative_source, file_path, template_options)
  end
end
route_resources(*resources)

Source: show 

# File rails/railties/lib/rails_generator/commands.rb, line 492
def route_resources(*resources)
  resource_list = resources.map { |r| r.to_sym.inspect }.join(', ')
  look_for = "\n  map.resources #{resource_list}\n"
  logger.route "map.resources #{resource_list}"
  gsub_file 'config/routes.rb', %r(#{look_for})/i, ''
end
template(relative_source, relative_destination, file_options = {})

Templates are deleted just like files and the actions take the same parameters, so simply alias the file method.