Symptom
When adding a seller product to cart from PDP, we consistently get:
The requested quantity is not available, please try again later.
packages/Webkul/Marketplace/src/Cart.php:108
The same happens if we call add-to-cart from a small diagnostic route (Product object + seller context).
What we have verified
Product / stock / channel mapping
product_flat (product_id=54) → price=60, status=1, visible_individually=1, weight=5.
Seller stock exists (vendor_id = 2) and channel sees source #5:
-- seller-scoped stock in active channel (returns 7)
SELECT SUM(pi.qty) AS salable_qty_seller
FROM product_inventories pi
JOIN channel_inventory_sources cis ON cis.inventory_source_id = pi.inventory_source_id
WHERE pi.product_id = 54
AND pi.vendor_id = 2
AND cis.channel_id = 1;
Raw inventory row:
SELECT * FROM product_inventories
WHERE product_id=54 AND vendor_id=2;
-- → (id=?, qty=7, product_id=54, vendor_id=2, inventory_source_id=5)
Channel “Balkan” inventory sources = 1, 2, 5 (vendor source #5 enabled).
Seller panel → Settings → Inventory Sources → source #5 Active.
Marketplace tables
Marketplace product row exists & approved:
SELECT * FROM marketplace_products WHERE product_id=54;
/* → id=34, product_id=54, marketplace_seller_id=2, is_approved=1, is_owner=1 */
Seller payload we submit
We post a complete seller context (product object, not ID):
{
"product_id": 54,
"quantity": 1,
"seller_id": 2,
"marketplace_seller_id": 2,
"seller_product_id": 34,
"inventory_source_id": 5,
"vendor_id": 2
}
Route & middlewares
We load a small proxy route under shop middlewares:
// app/Providers/MpRouteServiceProvider.php
Route::middleware(['web','channel','theme','locale','currency'])
->group(base_path('routes/mp.php'));
// routes/mp.php (excerpt)
Route::post('/mp-add-to-cart', function (Request $r, ProductRepository $products) {
$p = $products->findOrFail((int) $r->input('product_id')); // Product OBJECT
$data = $r->validate([
'product_id' => 'required|integer',
'quantity' => 'nullable|integer|min:1',
'seller_id' => 'nullable|integer',
'seller_product_id' => 'nullable|integer',
'marketplace_seller_id' => 'nullable|integer',
'inventory_source_id' => 'nullable|integer',
'vendor_id' => 'nullable|integer',
]);
$payload = ['quantity' => (int)($data['quantity'] ?? 1)];
foreach (['seller_id','seller_product_id','marketplace_seller_id','inventory_source_id','vendor_id'] as $k) {
if (!empty($data[$k])) $payload[$k] = (int) $data[$k];
}
\Log::error('MP ADD payload', $payload); // we see it in logs
// Marketplace Cart first:
try {
\Webkul\Checkout\Facades\Cart::addProduct($p, $payload);
} catch (\Throwable $e) {
// TEMP fallback so checkout doesn’t block (works):
if (str_contains($e->getMessage(), 'requested quantity')) {
app(\Webkul\Checkout\Cart::class)->addProduct($p, ['quantity' => $payload['quantity']]);
} else {
throw $e;
}
}
return redirect('/checkout/cart');
});
PDP seller CTA
On PDP we render seller info and post to /mp-add-to-cart with the payload fields above.
The problem
Even with the complete seller payload (and channel seeing source #5), Marketplace Cart still throws “requested quantity is not available …” from Marketplace/src/Cart.php:108.
If we enable the core fallback in our route, item is added to cart and checkout works; but we’d like to keep the pure Marketplace flow.
Question
For this Bagisto Marketplace build, what exact parameter(s) or flag does Marketplace Cart need at addProduct($product, $data) to pick the seller stock in the active channel?
We already include: seller_product_id, marketplace_seller_id, vendor_id, inventory_source_id, and the route runs with web, channel, theme, locale, currency.
Seller stock (vendor_id=2 on source_id=5) is present and visible to the channel (salable_qty_seller = 7).
Is there any additional switch or internal lookup (e.g., a specific field in seller profile) our minor version expects so that the Cart sums the seller stock instead of returning 0?
Any pointer/snippet would be highly appreciated. Thanks a lot!
Notes
We’re currently using the core fallback so store can sell normally; looking to remove it once we align the Marketplace Cart expectations.
Thanks!