Accept Merge Request #1703: (feature/part_number -> develop)

Merge Request: 工艺确认重置表面工艺工单的关联采购单为草稿

Created By: @廖丹龙
Reviewed By: @胡尧
Approved By: @胡尧 
Accepted By: @廖丹龙
URL: https://jikimo-hn.coding.net/p/jikimo_sfs/d/jikimo_sf/git/merge/1703

sf_sale/models/sale_order.py

@@ -346,6 +346,7 @@ class RePurchaseOrder(models.Model):
             server_product_process = []
             purchase_order = pp._get_surface_technics_purchase_ids()
             if purchase_order:
+                purchase_order.write({'state': 'draft'})
                 pp.purchase_id = [(6, 0, [purchase_order.id])]
             else:
                 server_template = self.env['product.template'].search(