在调拨单确认生成欠单时，修改对应采购申请明细行的目标移动

jikimo_purchase_request/models/stock_picking.py

@@ -33,3 +33,13 @@ class StockPicking(models.Model):
                 'view_mode': 'tree,form',
             })
         return action
+
+    def _action_done(self):
+        res = super(StockPicking, self)._action_done()
+        # 将采购申请明细行的move_dest_ids设置为backorder_ids
+        backorder_ids = self.backorder_ids
+        if backorder_ids:
+            purchase_request_lines = self.move_ids.move_orig_ids.purchase_line_id.purchase_request_lines
+            if purchase_request_lines:
+                purchase_request_lines.move_dest_ids = [(4, x.id) for x in backorder_ids.move_ids]
+        return res