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I would like to add a product programmed into the cart, but I don't want to add that into the Database to the other products. Is it possible to do that? And how I can control the information for the invoice?

The reason why i want to do that is - I would like to generate a product via a form and want to add special information with special prices. All these information I want to have on the invoice too.

UPDATE:

It is a generator with which the customer can group individual products and put them together with different assignments. There are also individual names for the respective version as for example Entrance door or conference room. It is a key system generator.

angUHLALA
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2 Answers2

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This question is all over the place, What have you tried so far?

  1. You want to add a product to the cart but not to the Woocommerce Products Database?
  2. You then want to add that "TempProduct" to the invoice aswell?
  3. This Product should be created from a Forum the Customer fills out then creates a custom product for them until they check out.

Can you explain why you would want to do any of this? What is the purpose of this custom product?

Someguy
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  • It is a generator with which the customer can group individual products and put them together with different assignments. There are also individual names for the respective version as for example Entrance door or conference room. It is a key system generator. – angUHLALA Feb 04 '20 at 16:33
  • Okay Can you Do me a favor Can you Update your Question with what environment your working with, What you've attempted so far, And If you could try and be as Detailed as Possible, Because the Questions one thing the Comment just makes me think you Want Temporary Variable products – Someguy Feb 05 '20 at 06:24
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This is a very interesting question. I think you are getting a lot of down votes and criticism because this is a hard question to answer but not because it is bad question. Fundamentally, you want to create a line item in the cart and a line item in an order directly from data entered on a form. I know this can be done because I have done something very similiar. The difficulty is that the API for WC_Cart requires a WC_Product object to create line items. I circumvented this by providing a proxy product object for WC_Cart to work with. Normally the properties of a product object would be populated from data in the database but I used actions and filters to populate the properties of the proxy object. Since, the invoice is generated from the order there is nothing to do as the line item would now exists in the order. For me this solution required a significant amount of advanced code, i.e., it took a lot of time and effort and advanced knowledge of WooCommerce.

Now for my rant. This is a very ugly solution and would not be necessary if WooCommerce was implemented differently. WooCoomerce (and WordPress) primarily use actions and filters to modify the default behavior of code. But, in object oriented programming classes are extended to modify the default behavior of a class. E.g. the class WC_Cart has the method:

public function add_to_cart( $product_id = 0, $quantity = 1, $variation_id = 0, $variation = array(), $cart_item_data = array() )

where either $product_id or $variation_id must be valid. Ideally, you would extend class WC_Cart with a new function add_to_cart() that can create a line item from only $cart_item_data. However, you cannot extend the class WC_Cart because the cart is created in the class WooCommerce by:

public function initialize_cart() {
    ...
    $this->cart = new WC_Cart();
    ...
}

Conversely, the use of class WC_Order is implemented so that it can be extended because order objects are created by a factory:

class WC_Order_Factory {
    public static function get_order( $order_id = false ) {
        ...
        // Filter classname so that the class can be overridden if extended.
        $classname = apply_filters( 'woocommerce_order_class', $classname, $order_type, $order_id );
        return new $classname( $order_id );
    }
}

So you can use the filter 'woocommerce_order_class' to extend the class WC_Order.

  • "This is a very interesting question. I think you are getting a lot of down votes and criticism because this is a hard question to answer" The Down Votes are because the question lacks Context, We dont know what Environment he's working in, Is this for some Mobile Application? a Web Application? Using MVC? React, Xamarin? Forms? I mean in order to assist with what he wants Which essentially is Temporary Variable Products or Temp Grouped Products we'll need to know. To give accurate advice – Someguy Feb 05 '20 at 06:17