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Is there a way to purge unused tags from the DB?

If I miss-tagged a question with "perview" instead of "preview". I go back and fix the tag.

However, I now have a tag "perview" in the system.
Is there a way to purge those unused tags? It would be ok if I had to explicitly do it.

something like: "python purge_tag perview"

If the in tag was used, I should get an error:

 "Error: Tag 'perview' is in use (in 2 questions: [148, 172])"

Showing the # of questions and the question number would be a nice bonus.

Evgeny's avatar
updated 2010-11-21 21:33:37 -0500
Benoit's avatar
asked 2010-11-19 10:30:45 -0500
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1 Answer


added management commands:

  • delete_unused_tags (no arguments)
  • rename_tags (arguments: --from, --to, [--user-id])
  • rename_tags_id (same arguments as in rename_tags, but renames by tag id's)

Both --from and --to parameters can have multiple tags, so you can split, rename and merge tags. If a parameter has multiple tags, it must be quoted.


python rename_tags --from biochemistry --to 'biology chemistry'

To find out more, type python <command> --help.

Give it a try. I had some dilemma on whether to mark retagging activity as the latest activity on the question or not. Right now the effective user will be marked as having performed the operation.

Please note that with MySQL in askbot transactions don't work, so it will be a good idea to make a backup, at least till you become comfortable with the commands.

Evgeny's avatar
updated 2010-11-21 21:31:53 -0500, answered 2010-11-19 16:48:46 -0500
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Is there a UI to access these commands on an hosted site?

todofixthis's avatar todofixthis (2012-07-28 11:13:55 -0500) edit

Not yet, we should get this done as for the hosted site this would be the only option.

Evgeny's avatar Evgeny (2012-07-28 11:48:39 -0500) edit

Can these commands be run when askbot is running, or does one need to shut it down before running these?

FranciscoD's avatar FranciscoD (2013-06-10 07:27:49 -0500) edit

@FranciscoD it's safe to run them on the active site.

Evgeny's avatar Evgeny (2013-06-10 10:39:43 -0500) edit

Great. Thanks :)

FranciscoD's avatar FranciscoD (2013-06-11 22:37:21 -0500) edit
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