private function update_post_meta( &$coupon ) {
		$meta_key_to_props = array(
			'discount_type'              => 'discount_type',
			'coupon_amount'              => 'amount',
			'individual_use'             => 'individual_use',
			'product_ids'                => 'product_ids',
			'exclude_product_ids'        => 'excluded_product_ids',
			'usage_limit'                => 'usage_limit',
			'usage_limit_per_user'       => 'usage_limit_per_user',
			'limit_usage_to_x_items'     => 'limit_usage_to_x_items',
			'usage_count'                => 'usage_count',
			'date_expires'               => 'date_expires',
			'free_shipping'              => 'free_shipping',
			'product_categories'         => 'product_categories',
			'exclude_product_categories' => 'excluded_product_categories',
			'exclude_sale_items'         => 'exclude_sale_items',
			'minimum_amount'             => 'minimum_amount',
			'maximum_amount'             => 'maximum_amount',
			'customer_email'             => 'email_restrictions',
		);

		$props_to_update = $this->get_props_to_update( $coupon, $meta_key_to_props );
		foreach ( $props_to_update as $meta_key => $prop ) {
			$value = $coupon->{"get_$prop"}( 'edit' );
			$value = is_string( $value ) ? wp_slash( $value ) : $value;
			switch ( $prop ) {
				case 'individual_use':
				case 'free_shipping':
				case 'exclude_sale_items':
					$value = wc_bool_to_string( $value );
					break;
				case 'product_ids':
				case 'excluded_product_ids':
					$value = implode( ',', array_filter( array_map( 'intval', $value ) ) );
					break;
				case 'product_categories':
				case 'excluded_product_categories':
					$value = array_filter( array_map( 'intval', $value ) );
					break;
				case 'email_restrictions':
					$value = array_filter( array_map( 'sanitize_email', $value ) );
					break;
				case 'date_expires':
					$value = $value ? $value->getTimestamp() : null;
					break;
			}

			$updated = $this->update_or_delete_post_meta( $coupon, $meta_key, $value );

			if ( $updated ) {
				$this->updated_props[] = $prop;
			}
		}

		do_action( 'woocommerce_coupon_object_updated_props', $coupon, $this->updated_props );
	}