Changing product is_purchasable in WooCommerce 3

Question

While developing a WooCommerce plugin which adds custom products to shoppin cart, I am using the function add_to_cart inside the class-wc-cart.php. But after updating woocomerce to latest version I receive the error.

Sorry, this product cannot be purchased.

because inside the function add_to cart, the section $product_data->is_purchasable() started to return false. I debugged a find out that the reason why is_purchasable() returns false is that get_price() function. Because this function returns empty as price, hence woocommerce tells me the product is not purchasable because of empty price.

The product has a price and can be added to the cart using the interface. The plugin was working fine with old version of woocommerce. Let me know if you need more data.

LoicTheAztec LoicTheAztec · Accepted Answer · 2018-04-21T23:34:43

You can make the necessary changes using and removing '' !== $product->get_price() from the IF statement, this way:

add_filter( 'woocommerce_is_purchasable', 'customizing_is_purchasable', 20, 2 );
function customizing_is_purchasable( $purchasable, $product ){
    if( $product->exists() && ( 'publish' === $product->get_status() || current_user_can( 'edit_post', $product->get_id() ) ) )
        $purchasable = true; 

    return $purchasable;
}

For product variations, you can also try at the same time (untested, but it should work):

add_filter( 'woocommerce_variation_is_visible', 'customizing_variation_is_visible', 20, 4 );
function customizing_variation_is_visible( $visible, $product_id, $parent_id, $product ){
    if( 'publish' === get_post_status( $product->get_id() ) )
        $visible = true;
    else
        $visible = false;

    return $visible;
}

Code goes in function.php file of your active child theme (or active theme). Tested and works.

Changing product is_purchasable in WooCommerce 3

1 Answers