Hi,
For those who comes across this and not being able to update/edit posts you can add if(is_numeric($value)) { to the code to check if the field is already stored like so:
At least that seems to work for me.
add_filter('acf/validate_value/type=file', 'my_acf_validate_value_file', 10, 4);
function my_acf_validate_value_file( $valid, $value, $field, $input ){
if(is_numeric($value)) {
return true;
} else {
// bail early if value is already invalid
if( !$valid ) {
return $valid;
}
// Get the allowed types and store it in an array
$allowed_types = explode(',', trim($field['mime_types']));
// Get the current file extension
$file_extension = pathinfo($value)['extension'];
// Check if the current file extension is allowed or not
if( !in_array($file_extension, $allowed_types) ){
$valid = 'This file type is not allowed';
}
// return
return $valid;
}
}
Kind regards
Henrik
