Method for changing price from extension

[helgatheviking]

I started working on an add-on that will let the user choose the price... (more like a donation really), but I've run into a wall with the cart and cart processing, b/c there isn't a way to adjust the price for the $product object. For the initial load I can use the woocommerce_get_price filter, but there's no place to hook into the woocommerce_update_cart_action() function and pass my updated price into the cart item.

apparently diigo won't let me embed, but here's a screen shot of what I'm doing

http://www.diigo.com/item/t/3250429_127605958_7444841

a couple of solutions that i need to investigate when i am fresher:
*a method to update the $price of an product object
*putting $price in the cart object

i've found adjust_price() and it is close, but its parameter is how much you'd like to change the price by, and not how much you' d like the final price to be. so this function has some potential, maybe a second parameter, or a similar function, but I also can't figure out how to access the correct $product object from my child class.

sidenote, should all the variables being declared at the beginning of WC_Product, not have var in front of them? i was under the impression they should be static?

[mikejolley]

Hi,

I'll add set_price just to make it clearer but in reality you can change ->price directly - the var is not private.

[helgatheviking]

nice. i have to come back to this at some point... i thought i was pretty close, but got stuck and then distracted by other more pressing jobs.

[joeblackwaslike]

@helgatheviking email me at joe@spektrumtheory.com when you finish that extension, it's a feature that's been asked for by a client but im too busy as well to really work on something. We'll be your first customer :D

[evandavey]

I am using set_price() to dynamically set a product's price but how do I then commit this change to the database? Is there a product save method? I've had a look at the product admin code and don't really want to have to rewrite the individual meta data update logic.

[mikejolley]

set_price is for dynamic pricing, its not for storing prices in the DB

[evandavey]

Ok - so there is no save product method?

Specifically, I am trying to manage products via xml-rpc. I can create a new product object but need to fire the save logic as the product is missing from the shop listing etc. until I go in and manually click save from the admin.

[mikejolley]

Use wp_insert_post and wp_update_post, and then update_post_meta for meta data.

[evandavey]

That's what I've tried - updating _price and _regular_price (the post gets created using the regular xml-rpc calls). The price gets changed but it won't show in the shop loop. Are there other meta fields I need to set - at the point this is called it is a new post of type product with only content and excerpt set?

function cd_add_price_to_product( $args ) {
    global $woocommerce;
    global $wp_xmlrpc_server;

    $wp_xmlrpc_server->escape( $args );

    $blog_id  = $args[0];
    $username = $args[1];
    $password = $args[2];
    $product_id = (int) $args[3];
    $price = (float) $args[4];

    if ( ! $user = $wp_xmlrpc_server->login( $username, $password ) )
           return $wp_xmlrpc_server->error;


    $product_data=get_post( $product_id );
    $product = $woocommerce->setup_product_data( $product_data );

    $product->set_price($price);

    /* must be a better way? */
    update_post_meta($product->id,'_price',$price);
    update_post_meta($product->id,'_regular_price',$price);

    return True;
}

[mikejolley]

Might be cache. Use $woocommerce->clear_product_transients( $product_id );

[evandavey]

That seems to have done the trick, thanks!

I'm not too familiar with the wordpress design pattern but is there a specific reason this isn't implemented as a save function on the object itself? Seems to me this would be a better approach.

[avenarie]

hello, can anyone please explain me the difference between the meta keys:
_sale_price (well, this is obvious)
_price
_regular_price (whats the difference to price ????)

especially i dont know why regular price and price?
thanks in advance

[mikejolley]

@avenarie _price is set to either the _sale_price or _regular_price depending on which is set and lower. Its used for sorting etc (not all products have a sale price).

[avenarie]

thanks a lot @mikejolley , this makes it really clearer!
so _price is basically a placeholder for the lowest price (sales price or regular price)
👍

[jamieatreyu1]

Was this add-on ever completed? I'd love to have it.

Jamie

[helgatheviking]

@jamieatreyu1 I did finish this extension. It lets the customer input any price she is willing to pay for a given product (currently only for single and subscription products) It is for sale at: http://www.woocommerce.com/products/name-your-price/ Hope it helps you!