WooCommerce Product save() function returns php notice

I can’t figure this one out. I’ve written the following function which updates the stock quantity of a particular item:

	public function update_stock( $sku, $quantity ) {
		$id      = $this->get_product_id( $sku );
		$product = wc_get_product( $id );

		if ( $quantity < 0 ) {
			$quantity = 0;
		}

		if ( $product != null ) {
			$product->set_stock_quantity( $quantity );
			if ( $quantity === 0 ) {
				$product->set_stock_status( 'outofstock' );
			} else {
				$product->set_stock_status( 'instock' );
			}
			$product->save();
		}
	}

However, calling the product save() function at the end returns a strange error which seems unrelated:

> Notice: Trying to get property ‘name’ of non-object in /opt/lampp/htdocs/wordpress/wp-content/plugins/woocommerce/includes/data-stores/class-wc-product-data-store-cpt.php on line 1488

Here’s what you can find in class-wc-product-data-store-cpt.php on line 1488:

    public function get_product_type( $product_id ) {
		$post_type = get_post_type( $product_id );
		if ( 'product_variation' === $post_type ) {
			return 'variation';
		} elseif ( 'product' === $post_type ) {
			$terms = get_the_terms( $product_id, 'product_type' );
			return ! empty( $terms ) ? sanitize_title( current( $terms )->name ) : 'simple'; //LINE 1488
		} else {
			return false;
		}
	}

Any help would be greatly appreciated!

• This topic was modified 7 years, 4 months ago by daniel982474.
• This topic was modified 7 years, 4 months ago by daniel982474.
• This topic was modified 7 years, 4 months ago by daniel982474.
• This topic was modified 7 years, 4 months ago by daniel982474.
• This topic was modified 7 years, 4 months ago by daniel982474.
• This topic was modified 7 years, 4 months ago by daniel982474.
• This topic was modified 7 years, 4 months ago by daniel982474.