Custom posttype content metabox

Question

In a plugin I've created a custom post type that stores xml representing models in the respective posts' content.

I've also created a custom meta box that allows the user to edit the xml with a graphic modeler. The changed xml gets stored in a hidden field's value.

When the user clicks Save Draft or Publish I want to save this value as the post's content. By using the save_post action the content gets saved, however I get redirected to a dead page with ERR_CONNECTION_RESET after a very long loading time when clicking on Save Draft.

This is my save_post action:

class MetaBoxes
{
    .
    .
    public function saveModel($postId, $post, $update)
    {
        if (get_post($postId)->post_type != $this->post_type)
        {
            return;
        }

        if (array_key_exists(self::INPUT_ID, $_POST))
        {
            wp_update_post([
                'ID' => $postId,
                'post_content' => urldecode($_POST[self::INPUT_ID])
            ]);
        }
    }
    .
    .
}

I know there are security issues in the current state. Let's ignore them until the main functionality is fixed.

Thanks in advance!

Answer 1

I think you may be in a recursive loop. if you hooked into save_post that will be triggered again when you call wp_update_post.

you can temporarily remove the hook. Not knowing exactly how you have written the hook the below code is a guess.

remove_action( 'save_post', [ $this, 'saveModel'] );

wp_update_post([
    'ID' => $postId,
    'post_content' => urldecode($_POST[self::INPUT_ID])
]);

add_action( 'save_post', [ $this, 'saveModel'] );