Usage does not work: "->where( 'post_level', '=', 2 )" and "->where( 'post_parent_id', '=', 12 )"

[valexxas]

Version

• Carbon Fields: 3.6.3
• WordPress: 6.3.2 / 6.4
• PHP: 8.1.9

Expected Behavior

Output meta fields only on child pages for the specified specific page

Actual Behavior

The nesting level and parent page are not defined.
If the condition is ->where( 'post_parent_id', '=', 0 ), then the fields will be displayed on all pages, including on child pages (having a parent page).
Also, when using ->where( 'post_level', '=', 0 ), the field is always output, including on child pages.
When specifying ->where( 'post_level', '=', <ANY_NUMBER>) or ->where( 'post_parent_id', '=', <ID_PARENT_PAGE> ) the fields are not output anywhere.

Container definition

add_action( 'carbon_fields_register_fields', function () {
	Container::make( 'post_meta', __( 'Meta fields' ) )
		//->where( 'post_type', '=', 'page' )
		//->where( 'post_level', '=', 2  )
		->where( 'post_parent_id', '=', 15 )
        ->add_fields( array(
		Field::make( 'text', 'page_title', 'Page Title' )
            ,
		) )
	;
} );

Comments

I'm sorry, I'm using a translator to communicate with you. There may be problems with the translation of phrases.

[valexxas]

I will supplement it.
Conditions: child page, condition for fields "->where( 'post_level', '=', 1 )" ( only the first level, not child ones), fields should not be output.
What happens: the CarbonFields fields are output, the input values are not saved. On the pages of the first level, the fields are displayed, their values are saved.
Removing the condition "->where( 'post_level', '=', 1 )". Result: fields are displayed everywhere, all values are saved as they should be.

[valexxas]

After experimentation, the problem was circumvented by a similar condition:

Container::make( 'post_meta',__( 'Meta fields' ) )
  ->where( 'post_type', '=', 'page' )
  ->where( 'post_level', 'CUSTOM', function( $post_level ) {
  return ( $post_level == 2 );
   } )
// OR
  ->where( 'post_parent_id', 'CUSTOM', function( $post_parent_id ) {
	return ( $post_parent_id == wc_get_page_id( 'shop' ) );
  } )