That makes sense. You would want to write up some custom WooCommerce filter/action on the checkout page and cart page that would display an error and not allow checkout if the “author” of the products is not all the same. This is a WooCommerce modification, the WC Vendors docs wont really help you much on this one.

http://docs.woothemes.com/document/hooks/
http://docs.woothemes.com/wc-apidocs/hook-docs.html

…is a list of all WooCommerce filters/actions. You’d have to identify which one works best for you, and go from there!

There’s also a plugin that *sorta* does what you need, but not really, perhaps customizing this plugin might also help: https://wordpress.org/plugins/maximum-purchase-for-woocommerce/

If you do write up a solution, we’d love it if you could post it back here and we can then add it to our KnowledgeBase in case other members are looking to do the same thing.

When an order is marked Processing or Completed, commission is awarded to vendor and the Vendor Notification email is sent.

There is no control for vendors to accept or reject orders. I’m not even sure that could be done, because buyers use payment gateways that take their money. You’d have to write in full refund provisions too, not an easy task and very specific to only your site. 🙁

Finally, I found the solution after reading and reading…I will like to share this, probably it will be useful to someone. This solution actually removes the cart of previous vendor#1 and items of vendor#2 are added to cart .
http://stackoverflow.com/questions/29092534/plugin-woocommerce-how-to-allow-add-to-cart-products-from-author

add_filter( ‘woocommerce_add_cart_item_data’, ‘woo_custom_add_to_cart’ );

function woo_custom_add_to_cart( $cart_item_data ) {
global $woocommerce;
$items = $woocommerce->cart->get_cart(); //getting cart items
$_product = array();
foreach($items as $item => $values) {
$_product[] = $values[‘data’]->post;
}
if(isset($_product[0]->ID)){ //getting first item from cart
$prodId = (int)$_POST[“add-to-cart”];
$product_in_cart_vendor_id = get_post_field( ‘post_author’, $_product[0]->ID);
$product_added_vendor_id = get_post_field( ‘post_author’, $prodId );
if( $product_in_cart_vendor_id !== $product_added_vendor_id ){$woocommerce->cart->empty_cart();}
return $cart_item_data; }}

I am making use of shipping weight, that is what is accepted in my country. Each shippment has minimum charge per box. Since all sellers are not at the same point, the calculation without separating the cart will be wrong.

@honey please can you tell me on which file this code write.

Hi,
the provided code was not working for me, I had to adapt it like this :

$prodId = (int) apply_filters( 'woocommerce_add_to_cart_product_id', $_GET['add-to-cart'] );
instead of
$prodId = (int)$_POST[“add-to-cart”];

I’ve also added a notice to inform the user.

//Order only from 1 shop 
//https://www.wcvendors.com/help/topic/restrict-clientbuyer-to-order-from-one-vendor-at-a-time/
add_filter( 'woocommerce_add_cart_item_data', 'woo_custom_add_to_cart' );
function woo_custom_add_to_cart( $cart_item_data ) {
    global $woocommerce;
    $items = $woocommerce->cart->get_cart(); //getting cart items
    $_product = array();
    foreach($items as $item => $values) {
    $_product[] = $values['data']->post;
    }
    if(isset($_product[0]->ID)){ //getting first item from cart
    $product_in_cart_vendor_id = get_post_field( 'post_author', $_product[0]->ID);
    $prodId = (int) apply_filters( 'woocommerce_add_to_cart_product_id', $_GET['add-to-cart'] );
    $product_added_vendor_id = get_post_field( 'post_author', $prodId );

    if( $product_in_cart_vendor_id !== $product_added_vendor_id ){$woocommerce->cart->empty_cart();wc_add_notice(  __("You can only order items from 1 shop !", "wcvendors"));}
    return $cart_item_data; } 
} 

cheers,

Marc

In the future we will likely be moving to sub-order management in WC Vendors.
For now, one of our next releases for WC Vendors Pro, v1.4.0 will at least have some more shipping options for the Vendor Shipping module included in Pro i.e. vendors can set a maximum $shipping fee per order regardless of items, free over $x amount, and more.
You are correct- for proper weight based shipping the solution will not be feasibly until WC Vendors core is overhauled to create sub-orders and possibly allow for more shipping and other extensions to be possible.

Hi,
I know it is an old post and my question may never be seen but, while the Restrict code above works very well when switching vendors it fails to recognise product variations as being part of the same vendor’s product set. As a result, addition of a variable product wipes the cart clean.

Has anyone had the same experience and is there any solution to this?

Best,
Nexus

Thanks for you efforts Marc.

I tested the code but it doesn’t work. Tried to tweak it but I got nowhere. In its current form only one product can be added to the cart and subsequent additions are not possible; no matter whether it is a variable product or not.

Also, the cart cannot be emptied by simply switching vendors. Addition of new product from a different vendor is not possible either.

FYI, I’m using the wc_vendors free version.

Best,
Nexus

Hi M,

The purpose of this code is to restrict the customer to purchasing from one vendor only. Therefore, when a product from a secondary vendor is added to the cart, other cart items belonging to the initial vendor need to be removed.

Honey’s July 24th code & Marc’s amendment of 27th of September do this very well.

The only problem here is that addition of a variable product to the cart ALSO removes cart items; no matter the variable product is from the same vendor or not.

This is the issue we were discussing lately.

Best,
Nexus

@ALIB
I’ll try to sort this out
Marc

Hi Marc ,

Thanks for code, have your got it completely ? like M said
cz i also need it

Thank you for your kindness

@marc-bovet
I tried the code correction you gave, works perfectly except for 2 things:
-Also have a problem with variable products (but I don’t really care, just added that issue in your notice.)
-does’nt work if you add a product to cart directly from the miniature on shop page. This one could be a problem. Any idea? I’m ok to disable the “add to cart button on the miniature, but don’t know how to do it.
Whatever, thanks for your code, solves one of the biggest issues of WC vendors free version, more appreciated than the per-product shipping solution (work in france, shipping is based on cart weight)

PS: I also tried the 2 other codes you gave, gives me a blank screen if I add products from different sellers in my cart, but I don’t care. Thanks for your involvement in the community!