Accept Merge Request #1941: (feature/采购单优化 -> develop)

Merge Request: 采购单采购类型计算方法添加新判断条件

Created By: @禹翔辉
Reviewed By: @马广威
Approved By: @马广威 
Accepted By: @禹翔辉
URL: https://jikimo-hn.coding.net/p/jikimo_sfs/d/jikimo_sf/git/merge/1941

sf_sale/models/sale_order.py

@@ -313,6 +313,8 @@ class RePurchaseOrder(models.Model):
     @api.depends('origin')
     def _compute_purchase_type(self):
         for purchase in self:
+            if not purchase.origin:
+                continue
             origin = [origin.replace(' ', '') for origin in purchase.origin.split(',')]
             order_ids = self.env['sale.order'].sudo().search([('name', 'in', origin)])
             if order_ids: