module Paperclip::Schema::Statements

def add_attachment(table_name, *attachment_names)
  raise ArgumentError, "Please specify attachment name in your add_attachment call in your migration." if attachment_names.empty?
  options = attachment_names.extract_options!
  attachment_names.each do |attachment_name|
    COLUMNS.each_pair do |column_name, column_type|
      column_options = options.merge(options[column_name.to_sym] || {})
      add_column(table_name, "#{attachment_name}_#{column_name}", column_type, column_options)
    end
  end
end

def drop_attached_file(*args)
  ActiveSupport::Deprecation.warn "Method `drop_attached_file` in the migration has been deprecated and will be replaced by `remove_attachment`."
  remove_attachment(*args)
end

def remove_attachment(table_name, *attachment_names)
  raise ArgumentError, "Please specify attachment name in your remove_attachment call in your migration." if attachment_names.empty?
  attachment_names.each do |attachment_name|
    COLUMNS.keys.each do |column_name|
      remove_column(table_name, "#{attachment_name}_#{column_name}")
    end
  end
end