Changing non-hierarchical taxonomy to hierarchical

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This support ticket is created 7 years ago. There's a good chance that you are reading advice that it now obsolete.

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Tagged: Setting up custom taxonomy, Types plugin

This topic contains 1 reply, has 2 voices.

Last updated by Christian Cox 7 years ago.

Assisted by: Christian Cox.

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November 14, 2017 at 12:41 pm #589445

robbert

Hi,
I would like to know if it is save to edit an existing(being used) non-hierarchical taxonomy to a hierarchical taxonomy. I mean, will all the settings and existing terms stay untouched? Can i expect any errors?

Thanks,
Robbert

November 14, 2017 at 5:56 pm #589599

Christian Cox

Hi, I would not expect errors when modifying a taxonomy from flat to hierarchical. All the options you have chosen in the Taxonomy editor will remain the same. All the term slugs and term IDs will remain the same, and all the associations between terms and posts will remain intact. If you have any custom code in place that tests is_taxonomy_hierarchical(), then you can expect it to reflect the new hierarchical status. If you have any Views with taxonomy parent-based filters, you should be aware that your ex-flat taxonomy terms may now have a parent. So it's always a good idea to back up your site completely before making a change like this, just to be safe. Then you can revert quickly if necessary.

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