Filtering with Tags

Andrew Turner

#221706

Hi,
As I understand it you can’t filter by 2 different parent categories at the same time? I’ve tested this and that does seem to be the case. So I believe I need to use Tags for the 2nd filter. However, with WordPress you can’t have child tags and unfortunately I need that functionality.

For example for tags I’d need:
England
> Midlands
> South West
Wales
> North Wales
> South Wales

Is there any way to achieve this without using a 2nd Category or Tags? Would a Custom Taxonomy be the only way?

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Trevor Moderator

#221726

That is correct, you need to make a custom taxonomy. Ideally, you should not use parent/child trees at all. For every parent, instead have a custom taxonomy with the children as the top level terms. Plugins like CPT UI are very popular for this reason/need.

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Andrew Turner

#221741

Thanks for the info, although I didn’t quite understand this sentence:

For every parent, instead have a custom taxonomy with the children as the top level terms.

Could you elaborate?

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Trevor Moderator

#221750

Let us say your site is about heritage cars. You use Category to group them

Your tree might look like this:

Ford
-Anglia
-Capri
-Popular
Triumph
-Stag
-TR6

and so on. Instead, have two taxonomies:

#1. Car Make

Ford
Triumph
Austin

etc.

#2 Car Model

Anglia
Capri
Popular
Stag
TR6
Seven
Allegro

The two become ‘linked’ when you select a make and model in a post.

If you have Auto Count On and Hide Empty ON, then, when you select a make, the models will filter down to just those relevant models.

Thus there are no child terms.

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Andrew Turner

#221756

I’m a bit confused as to how they will be linked if they are seperate taxonomys?

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Trevor Moderator

#221758

Our plugin does that if you make the settings a said. t links them by looking at your usage of them in posts.

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