Template Deletion Fails Without Messaging When Template is in Use #11789
Description
Description:
When attempting to delete a template that has been used to publish a dataset, the deletion silently fails. The frontend and backend both block deletion, but no user-facing message is displayed.
Steps to Reproduce:
Log in to Dataverse.
Create or use an existing template.
Create and publish a dataset using that template.
Return to the template page.
Attempt to delete the template used by the dataset.
Observed Behavior:
Deletion fails on both frontend and backend.
No message or warning is shown to the user.
Expected Behavior:
User should be informed that the template cannot be deleted because it is currently in use by one or more datasets.
A clear error or warning message should be displayed.
Logs / Evidence:
See attached server.log (reproduced on latest develop branch).
Environment: Internal
Branch: develop 6.7.1
Proposed Fix / Suggestion:
Add a check during template deletion to confirm whether the template is in use.
If in use, block deletion and display a clear message:
“This template cannot be deleted because it is being used by published datasets.”