In a backend component, I have one table that does not have numeric ID numbers. It is instead indexed on a unique alphanumeric value (think like a list of U.S. territories indexed on abbreviation, e.g. 'AZ'). I am working on building a simple view to display and edit these records, but Joomla! strips off the non-numeric ID numbers, removing the "id=" part of the query string altogether when I attempt to edit a record. Where in the system does this occur and can we safely override it?
You have a couple of options here:
1) Easiest is to create a new auto increment field in your table and use that ID for your editing layout.
2) In your list view create a link that goes to the editing layout and rely on that link for getting to the editing screen. (example: index.php?option=my_component&view=my_view&layout=edit&my_alpha_id=123ABC&task=my_view.edit)
Be sure if you go the link route that you add the task URL Param to keep from getting errors. Also change the bold sections above to meet your needs.