+sub save_and_redirect_to {
+  my ($self, %params) = @_;
+
+  my $errors = $self->save();
+
+  if (scalar @{ $errors }) {
+    $self->js->flash('error', $_) foreach @{ $errors };
+    return $self->js->render();
+  }
+
+  my $text = $self->type eq sales_order_type()       ? $::locale->text('The order has been saved')
+           : $self->type eq purchase_order_type()    ? $::locale->text('The order has been saved')
+           : $self->type eq sales_quotation_type()   ? $::locale->text('The quotation has been saved')
+           : $self->type eq request_quotation_type() ? $::locale->text('The rfq has been saved')
+           : '';
+  flash_later('info', $text);
+
+  $self->redirect_to(%params, id => $self->order->id);
+}
+
+sub save_history {
+  my ($self, $addition) = @_;
+
+  my $number_type = $self->order->type =~ m{order} ? 'ordnumber' : 'quonumber';
+  my $snumbers    = $number_type . '_' . $self->order->$number_type;
+
+  SL::DB::History->new(
+    trans_id    => $self->order->id,
+    employee_id => SL::DB::Manager::Employee->current->id,
+    what_done   => $self->order->type,
+    snumbers    => $snumbers,
+    addition    => $addition,
+  )->save;
+}
+
+sub store_doc_to_webdav_and_filemanagement {
+  my ($self, $content, $filename, $variant) = @_;
+
+  my $order = $self->order;
+  my @errors;
+
+  # copy file to webdav folder
+  if ($order->number && $::instance_conf->get_webdav_documents) {
+    my $webdav = SL::Webdav->new(
+      type     => $order->type,
+      number   => $order->number,
+    );
+    my $webdav_file = SL::Webdav::File->new(
+      webdav   => $webdav,
+      filename => $filename,
+    );
+    eval {
+      $webdav_file->store(data => \$content);
+      1;
+    } or do {
+      push @errors, t8('Storing the document to the WebDAV folder failed: #1', $@);
+    };
+  }
+  if ($order->id && $::instance_conf->get_doc_storage) {
+    eval {
+      SL::File->save(object_id     => $order->id,
+                     object_type   => $order->type,
+                     mime_type     => SL::MIME->mime_type_from_ext($filename),
+                     source        => 'created',
+                     file_type     => 'document',
+                     file_name     => $filename,
+                     file_contents => $content,
+                     print_variant => $variant);
+      1;
+    } or do {
+      push @errors, t8('Storing the document in the storage backend failed: #1', $@);
+    };
+  }
+
+  return @errors;
+}
+
+sub link_requirement_specs_linking_to_created_from_objects {
+  my ($self, @converted_from_oe_ids) = @_;
+
+  return unless @converted_from_oe_ids;
+
+  my $rs_orders = SL::DB::Manager::RequirementSpecOrder->get_all(where => [ order_id => \@converted_from_oe_ids ]);
+  foreach my $rs_order (@{ $rs_orders }) {
+    SL::DB::RequirementSpecOrder->new(
+      order_id            => $self->order->id,
+      requirement_spec_id => $rs_order->requirement_spec_id,
+      version_id          => $rs_order->version_id,
+    )->save;
+  }
+}
+
+sub set_project_in_linked_requirement_specs {
+  my ($self) = @_;
+
+  my $rs_orders = SL::DB::Manager::RequirementSpecOrder->get_all(where => [ order_id => $self->order->id ]);
+  foreach my $rs_order (@{ $rs_orders }) {
+    next if $rs_order->requirement_spec->project_id == $self->order->globalproject_id;
+
+    $rs_order->requirement_spec->update_attributes(project_id => $self->order->globalproject_id);
+  }
+}
+