Merge branch 'ticket_2473' into 'dev_cooperatic'

Ticket 2473 : If a product stock value is 0 and sales average value is 0, set 1 package to order

See merge request !136

orders/static/js/orders_helper.js

@@ -258,8 +258,13 @@ function add_product() {
     return 0;
 }
 function compute_purchase_qty_for_coverage(product, coeff, stock, incoming_qty, daily_conso, days) {
-    let purchase_qty_for_coverage = null;
+    let purchase_qty_for_coverage = 0,
+        purchase_package_qty_for_coverage = 0;
+
+    if (stock == 0 && daily_conso == 0) {
+        purchase_package_qty_for_coverage = 1;
 
+    } else {
         purchase_qty_for_coverage = days * daily_conso - stock - incoming_qty + product.minimal_stock;
         purchase_qty_for_coverage = (purchase_qty_for_coverage < 0) ? 0 : purchase_qty_for_coverage;
 
@@ -269,6 +274,7 @@ function compute_purchase_qty_for_coverage(product, coeff, stock, incoming_qty,
         if (coeff != 1) {
             purchase_package_qty_for_coverage *= coeff;
         }
+    }
     // return Round up to unit for all products
     return Math.ceil(purchase_package_qty_for_coverage);
 }