Query Args Confusion

This topic has 6 replies, 2 voices, and was last updated 2 years, 10 months ago by Jeremy Parrott.

Viewing 7 posts - 1 through 7 (of 7 total)

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January 29, 2022 at 7:00 AM #33555

Participant

Below is the code I am using... it works perfectly if I substitute the actual post_parent ID for the variable $post_parent so I am not sure why it's not working. Do I have the $post_parent variable wrong?

[
                'name'       => __( 'Controller', 'your-text-domain' ),
                'id'         => $prefix . 'controller',
                'type'       => 'post',
                'post_type'  => ['controller'],
                'field_type' => 'select_advanced',
                'query_args' => [
            'orderby'     => 'post_title',
                        'order'       => 'ASC',
            'post_parent' =>  $post_parent,
                ],
                'tab'        => 'monitor_details',
            ],

January 30, 2022 at 5:55 PM #33574

Long Nguyen

Moderator

Hi Jeremy,

Can you please share the code that gets the post parent? Do you want to set the current post as the post parent?

February 1, 2022 at 1:38 AM #33586

Jeremy Parrott

Participant

I don't have that code... I tried this and many other combinations.

$prefix = '';
$post_parent = ($_POST['post_parent']);
$post_id = null;
if ( isset( $_GET['post'] ) ) {
$post_id = intval( $_GET['post'] );
} elseif ( isset( $_POST['post_ID'] ) ) {
$post_id = intval( $_POST['post_ID'] );
}

February 2, 2022 at 2:47 PM #33611

Long Nguyen

Moderator

Hi Jeremy,

So if the current post has child posts, you can assign the variable $post_id to the parameter post_parent

[
    'name'       => __( 'Controller', 'your-text-domain' ),
    'id'         => $prefix . 'controller',
    'type'       => 'post',
    'post_type'  => ['controller'],
    'field_type' => 'select_advanced',
    'query_args' => [
        'orderby'     => 'post_title',
        'order'       => 'ASC',
        'post_parent' =>  $post_id,
    ],
    'tab'        => 'monitor_details',
],

Read more about parameter post_parent here https://developer.wordpress.org/reference/classes/wp_query/#post-page-parameters

February 2, 2022 at 10:30 PM #33623

Jeremy Parrott

Participant

The current post is a child of the same parent that I am wanting to filter by.

Location = parent
Controllers = child
Monitors = child

My goal is for the query arg to only show the controllers with the same parent as the monitor (current page) I am on.

February 6, 2022 at 10:40 PM #33680

Long Nguyen

Moderator

Hi,

Ok, I got your case. You can use the WordPress function wp_get_post_parent_id() to get the post parent of the current post. Then use the post parent (ID) in the field query args. For example:

function your_prefix_function_name( $meta_boxes ) {
    $prefix = '';

    $post_id = null;
    if ( isset( $_GET['post'] ) ) {
    $post_id = intval( $_GET['post'] );
    } elseif ( isset( $_POST['post_ID'] ) ) {
    $post_id = intval( $_POST['post_ID'] );
    }

    // Get post parent of the current post
    $post_parent = wp_get_post_parent_id( $post_id );
    $meta_boxes[] = [
        ...
        'fields'     => [
            [
                'name'       => __( 'Controller', 'your-text-domain' ),
                'id'         => $prefix . 'controller',
                'type'       => 'post',
                'post_type'  => ['controller'],
                'field_type' => 'select_advanced',
                'query_args' => [
                    'orderby'     => 'post_title',
                    'order'       => 'ASC',
                    'post_parent' =>  $post_parent, // Show child posts
                    'post__not_in' => [ $post_id ] // Exclude current post
                ],
                'tab'        => 'monitor_details',
            ],
        ],
    ];
    return $meta_boxes;
}

February 9, 2022 at 1:03 AM #33776

Jeremy Parrott

Participant

I figured it out... thank you. But for some reason, I had to replace this code block:

$prefix = '';

$post_id = null;
if ( isset( $_GET['post'] ) ) {
$post_id = intval( $_GET['post'] );
} elseif ( isset( $_POST['post_ID'] ) ) {
$post_id = intval( $_POST['post_ID'] );
}

with this:

$prefix = '';

$post_id = null;
$parts = parse_url($_SERVER['REQUEST_URI']);
$pieces = explode('/', $parts['path']);
$post_id = $pieces[2];

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