EDD One Item Per Customer

edd_limit.php

// Prevent checkout if offer already purchased
add_filter( 'edd_can_checkout', 'wd_limit_purchase' );
function wd_limit_purchase(){
	$user_id 		= get_current_user_id(); // Get the current customer's ID
	$downloads 		= edd_get_users_purchased_products( $user_id );// Get all of the products the customer has purchased in the past
	$can_checkout 		= true; // Allow checkout for now

	if ( ! empty( $downloads ) ){ // If the customer hasn't purchased anything before we don't need to go any further.
		foreach ( $downloads as $download ){ // Loop through each product the customer has purchased before.

			$download_id = $download->ID;
			$in_cart = edd_item_in_cart( $download_id );

			if( $in_cart == true ) {
				$can_checkout = false;
			}

		}
	}
	return $can_checkout;
}

Hi @MWhiteley,

I got here from scottdeluzio.com post about this.

I was wondering if you know how to make this code to check all the downloads on a specific category, so every time I add a download to that category I don't have to edit the code with new ID's?

Thanks
All the best.