regex based mass update

[saxix]

This feature should work as a Django admin action and allow updating a filtered Queryset based on the provided Regex.

How it should work:

• User filters the data using standard Admin Changelist filters (program filter is always mandatory)

• A page is displayed to set:

  • the field that needs to be updated chosen from the list of available fields for the program the filtered data belongs to
  • the regex to apply (sed style)

• after the user clicks "Start", the system displays a preview of the changed data (before/ after)

• If the user clicks "Apply", the changes are applied to the datased

• If the user clicks "Back", he is redirected to the previous page

• If the user clicks "Cancel," he is redirected to the Changelist page, where the selected filters are still applied.

[saxix]

Should we run mass update twice, or should we keep preview data and apply it later?

after 'Start' button is clicked, we mass update existing values and validate them using linked DataChecker. Processed data can be added to an hidden field to be applied after "Apply"