wordpress query – orderby child post date

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I have support ticket system which i have built using wordpress.

The basic functionality is that when a “ticket” is created, it creates a post. When an admin replies, it then add a child post to the original post.

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My question is how can i order my posts by the child post_date is ASC order?

My query args at the moment are: 

$args = array(
  'post_type' => 'support_tickets',
  'numberposts' => -1,
  'post_parent' => 0,
  'orderby' => 'date',
  'order' => 'DESC'  );

This only obviously orders the parent post’s in ASC by date. Is what i require achievable?

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1 comment

  1. You should be able to do this with the get_children function (see the codex),

    $ticket_id = 34; // assume you want to retried the replies of ticket post id=34
$args = array(
  'post_type' => 'support_tickets',
  'numberposts' => -1,
  'post_parent' => $ticket_id,
  'orderby' => 'date',
  'order' => 'DESC'  );
$replies = get_children( $args );

    Assuming that your custom post support_tickets has been registered with the attribute hierarchical set to true (see codex).

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