[FIX]stock_picking_report_valued: Fix OCA#305. Take currency field fr…

…om company if not sale line related

stock_picking_report_valued/models/stock_move_line.py

@@ -15,7 +15,10 @@ class StockMoveLine(models.Model):
         related="move_id.sale_line_id", readonly=True, string="Related order line"
     )
     currency_id = fields.Many2one(
-        related="sale_line.currency_id", readonly=True, string="Sale Currency"
+        comodel_name='res.currency',
+        compute="_compute_sale_currency_id", 
+        readonly=True, 
+        string="Sale Currency",
     )
     sale_tax_id = fields.Many2many(
         related="sale_line.tax_id", readonly=True, string="Sale Tax"
@@ -44,6 +47,15 @@ class StockMoveLine(models.Model):
         compute="_compute_sale_order_line_fields", string="Total", compute_sudo=True
     )
 
+    @api.depends("sale_line", "company_id")
+    def _compute_sale_currency_id(self):
+        for line in self:
+            line.currency_id = (
+                line.sale_line.currency_id.id 
+                if line.sale_line
+                else line.company_id.currency_id.id
+            )
+
     def _get_report_valued_quantity(self):
         return self.qty_done or self.reserved_qty