14 lines
627 B
Diff
14 lines
627 B
Diff
diff --git a/tryton/modules/sale_shipment_cost/sale.py b/tryton/modules/sale_shipment_cost/sale.py
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index d5d6de2d68..a490801a56 100644
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--- a/tryton/modules/sale_shipment_cost/sale.py
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+++ b/tryton/modules/sale_shipment_cost/sale.py
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@@ -306,7 +306,7 @@ class SaleLine(metaclass=PoolMeta):
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def _get_invoice_line_quantity(self):
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quantity = super(SaleLine, self)._get_invoice_line_quantity()
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- if self.shipment_cost:
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+ if self.shipment_cost is not None:
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if self.sale.shipment_cost_method == 'shipment':
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return 0
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elif (self.sale.shipment_cost_method == 'order'
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