I have a feeling it may be some kind of issue with the ACF cache.
In advanced-custom-fields-pro/api/api-value.php for the acf_get_value function I’ve dotted it with some error_log function calls:
[code]
function acf_get_value( $post_id = 0, $field ) {
// vars
$cache_key = “get_value/post_id={$post_id}/name={$field[‘name’]}”;
error_log( $cache_key );
// return early if cache is found
if( acf_isset_cache($cache_key) ) {
error_log( ‘cache is set, retrieving from cache’ );
$cache_value = acf_get_cache($cache_key);
error_log( json_encode( $cache_value, JSON_PRETTY_PRINT ) );
return $cache_value;
}
// load value
$value = acf_get_metadata( $post_id, $field[‘name’] );
error_log( json_encode( $value, JSON_PRETTY_PRINT ) );
// if value was duplicated, it may now be a serialized string!
$value = maybe_unserialize( $value );
error_log( json_encode( $value, JSON_PRETTY_PRINT ) );
// no value? try default_value
if( $value === null && isset($field[‘default_value’]) ) {
$value = $field[‘default_value’];
}
// filter for 3rd party customization
$value = apply_filters( “acf/load_value”, $value, $post_id, $field );
$value = apply_filters( “acf/load_value/type={$field[‘type’]}”, $value, $post_id, $field );
$value = apply_filters( “acf/load_value/name={$field[‘_name’]}”, $value, $post_id, $field );
$value = apply_filters( “acf/load_value/key={$field[‘key’]}”, $value, $post_id, $field );
error_log( json_encode( $value, JSON_PRETTY_PRINT ) );
// update cache
acf_set_cache($cache_key, $value);
// return
return $value;
}
[/code]
And then my debug error log output looks like this:
[code]
[22-Jan-2017 17:14:22 UTC] get_value/post_id=6180/name=products_selected
[22-Jan-2017 17:14:22 UTC] cache is set, retrieving from cache
[22-Jan-2017 17:14:22 UTC] false
[22-Jan-2017 17:14:22 UTC] action_save_post_selection
[22-Jan-2017 17:14:22 UTC] 6180
[22-Jan-2017 17:14:22 UTC] false
[22-Jan-2017 17:14:22 UTC] {
“field_5834bbcfd967e”: [
{
“field_etc”…
[/code]
