Save uploads to post_id subfolder when creating new posts with acf_form.

• dirksnat

• April 23, 2020 at 4:22 am

I have a frontend form that allows images to be added within a repeater field.

To keep things organized, I’d like the images to save in a custom upload location — uploads/post/[post_id].

The code works when posting from the backend — the images end up in uploads/post/[post_id]. When posting from the frontend the images are placed in uploads/post.

How do I hook into the save process to make post_id available to acf/upload_prefilter? Or is there another approach that I should be taking?

Also note that in production the form will be available to subscribers on the frontend who don’t have the upload_files capability, so the image(s) won’t actually be uploaded until the form is submitted.

new-post.php

acf_form_head();
get_header(); 

	while ( have_posts() ) : the_post(); 

	acf_form(array(
		'post_id'       => 'new_post',
		'new_post'      => array(
			'post_type'     => 'post',
			'post_status'   => 'publish'
		),
		'submit_value'  => 'Create New Post'
	));

	endwhile; 

get_footer();

functions.php

add_filter('acf/upload_prefilter', 'my_upload_prefilter');
function my_upload_prefilter($errors) {
	add_filter('upload_dir', 'my_custom_post_upload_dir');
	return $errors;
}

function my_custom_post_upload_dir($uploads) {
	$post_id = ( isset( $_REQUEST['post_id'] ) ? $_REQUEST['post_id'] : '' );

	$subdir = $post_id;
	$uploads['subdir'] = $subdir;
	$uploads['url'] = $uploads['baseurl'] . '/post/' . $subdir;
	$uploads['path'] = $uploads['basedir'] . '/post/' . $subdir;
	return $uploads;
}