关联托盘时，要把大包之前 关联的托盘上的大包移除

ccs_pallet/models/cc_pallet.py

@@ -115,6 +115,10 @@ class CcPallet(models.Model):
         for pallet in self:
             pallet.usage_state = 'used'
             pallet.usage_date = usage_date
+            # 要把这个大包关联的托盘取消关联
+            for package in success_package:
+                package.pallet_id.package_ids = [(3, package.id, 0)]  # 移除这个大包
+
             # 关联大包到托盘
             pallet.package_ids = [(4, package_id.id, 0) for package_id in success_package]
             # 更新大包的托盘信息