How to exclude a parent post from a loop of matching taxonomy terms

Loops & Logic
1

Hi there, I am hoping this is possible - but I am unable to work out how to do it after looking through the documentation:

  • I have a custom post type called ‘campaign’ (made using ACF)
  • I have a custom taxonomy called ‘link-reference’ (made using ACF) which is assigned to the campaign post type
  • The campaign post type is hierarchical (so I have parent and child posts within this post type)
  • I have, for example, 5 posts that all have the same link-reference term of ‘2024-abc-campaign’. 1 of these is a parent post and the other 4 are child posts

I would like to write a L&L loop which allows me to display all campaign posts with the term of ‘2024-abc-campaign’, but excluding the Parent post (so it will only display the child posts which have that term).

Is this possible?

Thanks very much in advance for your help,

Keith

2

Maybe you could do this with the parent field and the field attribute? I don’t have time to test this myself unfortunately but the loop might look something like this:

<Loop 
     post_type=campaign 
     taxonomy=link-reference 
     terms=2024-abc-campaign 
     field=parent 
     field_compare=is_not 
     field_value=""
>

This might not work as-is, so maybe you could try looping through all posts, displaying the parent field value for your different posts, and then adjusting the comparison in field_compare and the value in field_value so that the logic makes sense based on what you’re trying to do.

Let me know if you get this working, it’s a pretty interesting use-case!

3

I looked into this and it turns out field=parent is enough to get all child posts with a parent, and filter out top-level posts.

<Loop post_type=campaign ... field=parent>

It works because the field parent will be empty for any top-level posts, and the default value for field_compare is exists.

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