Issue with NULL values in mapped fields

I was having an issue where some fields were not being updated in Infusionsoft for existing contact records. After much testing and troubleshooting I determined (with the help of the logs!) that the issue was NULL values being passed in the $merge_vars array. Removing the NULL values from the array resolved the issue for me.

Here’s how I did it:

Add a new filter to the plugin by modifying the infusionsoft.php file. I added it after the foreach loop in the export_feed() function around line 1693:

$merge_vars = apply_filters('gf_infusionsoft_merge_vars', $merge_vars);

Then in the theme’s functions.php or a custom functions plugin add something like this:

add_filter('gf_infusionsoft_merge_vars', 'mycustom_gf_infusionsoft_merge_vars');
function mycustom_gf_infusionsoft_merge_vars($merge_vars) {
	foreach( $merge_vars as $key => $value ) {
		if( $value == '' ) {
			unset($merge_vars[$key]);
		}
	}
	return $merge_vars;
}

Infusionsoft Gravity Forms Add-on team: Could the gf_infusionsoft_merge_vars filter be added in the next update?

https://wordpress.org/plugins/infusionsoft/