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Custom location rules for attachment modals

  • I’ve succesfully extended ACF (latest version) custom location rules to hide a custom field on attachment pages based on media type.

    The following field rules are applied:

    • Other > Attachment == All
    • AND

    • [CUSTOM] Other > Media Type != image

    The rules hide the custom field on attachment pages where wp_attachment_is_image() returns true. However, the custom rule is not applied on media modals (e.g. when clicked on Edit file in an ACF field with type: Image). Effectively, it only works in the media library.
    The first rule (ACF native) is able to control custom field display in media modals. What am I missing?

    The code that adds the custom field rule:

    add_filter('acf/location/rule_types', 'acf_location_rules_types');
    function acf_location_rules_types( $choices )
        $choices[__("Other",'acf')]['mediatype'] = __("Media Type",'acf');
        return $choices;
    add_filter('acf/location/rule_values/mediatype', 'acf_location_rules_values_mediatype');
    function acf_location_rules_values_mediatype( $choices )
        $choices[ 'image' ] = 'Image';
        return $choices;
    add_filter('acf/location/rule_match/mediatype', 'acf_location_rules_match_mediatype', 10, 3);
    function acf_location_rules_match_mediatype( $match, $rule, $options )
        if($rule['operator'] == "==")
            return wp_attachment_is_image( $options["post_id"] );
        elseif($rule['operator'] == "!=")
            return !wp_attachment_is_image( $options["post_id"] );
        return $match;
  • I have problem getting the post_id

    $options array is all 0 (like default values)

    any hint?

  • I’ve had the same problem myself. I was looking for a way to only show fields when the attachment was an image. Unfortunately I was never able to do so. What I did was I set my acf/location/rule_match/attachment filter to output information to a file. I tried outputting everything I could think of to this file to see if there was anything that would tell me the post id or any useful information so that I could show the images on the WP modals with no luck.

    Anyway, if someone else would like to try this and see if they can come up with anything that I missed, this is the code I put into my filter, if outputs stuff into a txt file in the same folder as the file with the function in it.

      add_filter('acf/location/rule_match/attachment', array($this, 'match_attachment_image'), 20, 3);
      function match_attachment_image($match, $rule, $options) {
        global $post;
        $file = dirname(__FILE__).'/output.txt';
        if (($handle = fopen($file, 'a')) !== false) {
          echo "\r\n",'$match = '; var_dump($match);
          echo "\r\n",'$rule = '; var_dump($rule);
          echo "\r\n",'$options = '; var_dump($options);
          echo "\r\n",'$post = '; var_dump($post);
          echo "\r\n".'$_POST = '; var_dump($_POST);
          echo "\r\n".'$_GET = '; var_dump($_GET);
          fwrite($handle, ob_get_clean());
        return $match;
  • I know this is an ancient thread, but I’m having exactly the same issues as pimschaaf, which is why I’m posting here. I’ve created a custom rule value named ‘Image’, and am trying to get it to match specifically for display/hiding purposes when editing a post with an image attachment. Absolutely nothing I’ve done so far has worked.

    add_filter( 'acf/location/rule_values/ef_media', 'acf_location_rule_values_ef_media' );
    add_filter( 'acf/location/rule_match/ef_media', 'acf_location_rule_match_ef_media', 10, 3 );
    function acf_location_rule_values_ef_media ( $choices ) {
    	$choices['image'] = 'Image';
    	return $choices;
    function acf_location_rule_match_ef_media ( $match, $rule, $options ) {
    	$id = get_the_ID();
    	if ( $rule['param'] = 'post_type' && $rule['value'] = 'attachment' ) {
    		if( $rule['operator'] === "==" ) {
    			$match = wp_attachment_is_image( $id );
        	} elseif ( $rule['operator'] === "!=" ) {
    			$match = !wp_attachment_is_image( $id );
    	} else {
    		$match = false;
    	return $match;

    Has this issue really not been resolved?

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