Cache subscription last order date

changelog.txt

@@ -13,6 +13,7 @@
 * Fix - Ensure the order_awaiting_payment session arg is restored when loading a renewal cart from the session to prevent duplicate orders.
 * Fix - Ensure custom placeholders (time_until_renewal, customers_first_name) are included in customer notification email previews.
 * Fix - Correctly load product names with HTML on the cart and checkout shipping rates.
+* Fix - Improve performance of the subscription listing page.
 * Dev - Fix Node version mismatch between package.json and .nvmrc (both are now set to v16.17.1).
 
 = 8.0.1 - 2025-02-13 =

includes/admin/class-wcs-admin-post-types.php

@@ -684,9 +684,25 @@ public function render_shop_subscription_columns( $column, $subscription = null
 	 * @since 1.0.0 - Migrated from WooCommerce Subscriptions v2.3.0
 	 */
 	public static function get_date_column_content( $subscription, $column ) {
-		$date_type_map  = array( 'last_payment_date' => 'last_order_date_created' );
-		$date_type      = array_key_exists( $column, $date_type_map ) ? $date_type_map[ $column ] : $column;
-		$date_timestamp = $subscription->get_time( $date_type );
+		$date_type_map = array( 'last_payment_date' => 'last_order_date_created' );
+		$date_type     = array_key_exists( $column, $date_type_map ) ? $date_type_map[ $column ] : $column;
+
+		if ( 'last_payment_date' === $column ) {
+			// Get last order date created from subscription metadata if it exists.
+			$last_order_date_created = $subscription->get_last_order_date_created();
+
+			if ( ! empty( $last_order_date_created ) ) {
+				$date_timestamp = $last_order_date_created;
+			} else {
+				// If not exists, get the last order date created from the orders and update the metadata.
+				$date_timestamp = $subscription->get_time( $date_type );
+
+				$subscription->set_last_order_date_created( $date_timestamp );
+				$subscription->save();
+			}
+		} else {
+			$date_timestamp = $subscription->get_time( $date_type );
+		}
 
 		if ( 0 === $date_timestamp ) {
 			return '-';

includes/class-wc-subscription.php

@@ -60,6 +60,7 @@ class WC_Subscription extends WC_Order {
 		'requires_manual_renewal' => true,
 		'cancelled_email_sent'    => false,
 		'trial_period'            => '',
+		'last_order_date_created' => null,
 
 		// Extra data that requires manual getting/setting because we don't define getters/setters for it
 		'schedule_trial_end'      => null,
@@ -908,6 +909,15 @@ public function get_cancelled_email_sent( $context = 'view' ) {
 		return $this->get_prop( 'cancelled_email_sent', $context );
 	}
 
+	/**
+	 * The subscription last order created date.
+	 *
+	 * @return string
+	 */
+	public function get_last_order_date_created( $context = 'view' ) {
+		return $this->get_prop( 'last_order_date_created', $context );
+	}
+
 	/*** Setters *****************************************************/
 
 	/**
@@ -1092,6 +1102,13 @@ public function set_cancelled_email_sent( $value ) {
 		$this->set_prop( 'cancelled_email_sent', $value );
 	}
 
+	/**
+	 * Set the subscription last order created date.
+	 */
+	public function set_last_order_date_created( $value ) {
+		$this->set_prop( 'last_order_date_created', $value );
+	}
+
 	/*** Date methods *****************************************************/
 
 	/**

includes/class-wc-subscriptions-data-copier.php

@@ -38,6 +38,7 @@ class WC_Subscriptions_Data_Copier {
 		'_suspension_count',
 		'_requires_manual_renewal',
 		'_cancelled_email_sent',
+		'_last_order_date_created',
 		'_trial_period',
 		'_created_via',
 		'_order_stock_reduced',

includes/class-wc-subscriptions-order.php

@@ -77,6 +77,8 @@ public static function init() {
 		add_filter( 'woocommerce_order_query_args', array( __CLASS__, 'map_order_query_args_for_subscriptions' ) );
 
 		add_filter( 'woocommerce_orders_table_query_clauses', [ __CLASS__, 'filter_orders_query_by_parent_orders' ], 10, 2 );
+
+		add_action( 'woocommerce_before_delete_order', __CLASS__ . '::delete_order_update_subscription_last_order_date_created', 10, 2 );
 	}
 
 	/*
@@ -2396,6 +2398,28 @@ public static function get_meta( $order, $meta_key, $default = 0 ) {
 		return $meta_value;
 	}
 
+	/**
+	 * Update subscription cached last_order_date_created metadata when deleting a child order.
+	 *
+	 * @param int      $id    The deleted order ID.
+	 * @param WC_Order $order The deleted order object.
+	 */
+	public static function delete_order_update_subscription_last_order_date_created( $id, $order ) {
+		if ( $order->get_created_via() !== 'subscription' ) {
+			return;
+		}
+
+		$subscription_ids = wcs_get_subscription_ids_for_order( $order );
+
+		foreach ( $subscription_ids as $subscription_id ) {
+			$subscription            = wcs_get_subscription( $subscription_id );
+			$last_order_date_created = $subscription->get_time( 'last_order_date_created' );
+
+			$subscription->set_last_order_date_created( $last_order_date_created );
+			$subscription->save();
+		}
+	}
+
 	/**
 	 * Prints the HTML for the admin dropdown for order types to Woocommerce -> Orders screen.
 	 *

includes/data-stores/class-wcs-orders-table-subscription-data-store.php

@@ -41,6 +41,7 @@ class WCS_Orders_Table_Subscription_Data_Store extends \Automattic\WooCommerce\I
 		'_cancelled_email_sent'     => 'cancelled_email_sent',
 		'_requires_manual_renewal'  => 'requires_manual_renewal',
 		'_trial_period'             => 'trial_period',
+		'_last_order_date_created'  => 'last_order_date_created',
 
 		'_schedule_trial_end'       => 'schedule_trial_end',
 		'_schedule_next_payment'    => 'schedule_next_payment',

includes/data-stores/class-wcs-subscription-data-store-cpt.php

@@ -49,6 +49,7 @@ class WCS_Subscription_Data_Store_CPT extends WC_Order_Data_Store_CPT implements
 		'_cancelled_email_sent'     => 'cancelled_email_sent',
 		'_requires_manual_renewal'  => 'requires_manual_renewal',
 		'_trial_period'             => 'trial_period',
+		'_last_order_date_created'  => 'last_order_date_created',
 
 		'_schedule_trial_end'       => 'schedule_trial_end',
 		'_schedule_next_payment'    => 'schedule_next_payment',

includes/wcs-order-functions.php

@@ -277,6 +277,9 @@ function wcs_create_order_from_subscription( $subscription, $type ) {
 			throw new Exception( sprintf( __( 'There was an error fetching the new order (%1$s) for subscription %2$d.', 'woocommerce-subscriptions' ), $type, $subscription->get_id() ) );
 		}
 
+		$subscription->set_last_order_date_created( $new_order->get_date_created()->getTimestamp() );
+		$subscription->save();
+
 		/**
 		 * Filters the new order created from the subscription.
 		 *