first commit

modules/purchase_product_quantity/purchase.py

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+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+from trytond.pool import PoolMeta
+
+
+class RequestCreatePurchase(metaclass=PoolMeta):
+    __name__ = 'purchase.request.create_purchase'
+
+    @classmethod
+    def compute_quantity(cls, requests, line, purchase):
+        quantity = super().compute_quantity(requests, line, purchase)
+        if line.product_supplier:
+            quantity = line.product_supplier.adapt_quantity(
+                quantity, line.unit, round=False)
+        return quantity