Taxonomy Advanced: Set starting node of categories with query_args

This topic has 4 replies, 2 voices, and was last updated 3 years, 6 months ago by Jugibur.

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June 24, 2021 at 3:28 PM #29101
Jugibur
Participant
Hi,

I want allow only select child nodes from a special hierarchical category (or the main category itself).
If have tested this base code and it works outside of the Meta Box configuration:
```
$terms_list = get_terms(array('taxonomy' => 'happyfiles_category', 'hide_empty' => false, 'parent' => 5));
print '<pre>' . print_r($terms_list, true) . '</pre>';
```
So I tried it with the 'query_args' key in this matter:
```
'query_args' => array(
  //'taxonomy' => 'happyfiles_category', 
  'hide_empty' => false,
  'posts_per_page' => - 1,
  'parent' => 5
)
```
But unfortunately I get following messages in backend:
```
Notice: Undefined offset: 0 in /Users/hoefs/Essentiell/Websites/htdocs/dab-wp-base/wordpress/wp-content/plugins/meta-box/inc/walkers/select-tree.php on line 52

Notice: Trying to get property 'parent' of non-object in /Users/hoefs/Essentiell/Websites/htdocs/dab-wp-base/wordpress/wp-content/plugins/meta-box/inc/walkers/select-tree.php on line 52

Notice: Undefined index: in /Users/hoefs/Essentiell/Websites/htdocs/dab-wp-base/wordpress/wp-content/plugins/meta-box/inc/walkers/select-tree.php on line 70

Warning: Invalid argument supplied for foreach() in /Users/hoefs/Essentiell/Websites/htdocs/dab-wp-base/wordpress/wp-content/plugins/meta-box/inc/walkers/select-tree.php on line 81
```
Does someone have a clue how to fix this? Thanks in advance!

Juergen

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June 24, 2021 at 4:32 PM #29105

Jugibur
Participant

After changing the field_type to 'select' (and not 'select_advanced') it now works! No warning messages any more. But perhaps you could solve this problem for 'select_advanced'. Thanks!

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June 24, 2021 at 4:51 PM #29106

Jugibur
Participant

I am attaching the following question to this thread as it relates to solving the problem...

Unfortunately the option "parent" in the query_args() limits the hierarchy to the immediately following child-nodes.
My idea is to use a hook to be able to return all following child-nodes with my own function result. Is there a way to do this with the select field type? In the docs of this field I can't find an answer to this problem.

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June 25, 2021 at 9:37 AM #29116

Long Nguyen
Moderator

Hi,

The message shows the error with the field select_tree, not select_advanced

Notice: Undefined offset: 0 in /Users/hoefs/Essentiell/Websites/htdocs/dab-wp-base/wordpress/wp-content/plugins/meta-box/inc/walkers/select-tree.php on line 52

the query args setting parent does not work with the select_tree field but works well with the select_advanced field. Can you please re-check it?

If you want to show all child terms on select, you can create your own custom field type. Follow this documentation to get more details https://docs.metabox.io/custom-field-type/
and refer to this topic https://support.metabox.io/topic/select-a-gravity-form-to-assign-to-a-cpt/

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June 25, 2021 at 12:38 PM #29120

Jugibur
Participant

Hi Long,

thanks for your reply! Yes, select_advanced works without errors but missing the hierarchy selection.

I'm using now the 'checkbox_tree' (without 'parent' query_args) and hiding the unwanted items (siblings) with CSS.
It's still not optimal , especially for a lot of items, because it takes up a lot of space, but it's good enough for now.

But if I have more time I will take a lock at the docs for a customt type and give it a try.

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