diff --git a/apps/wpmw/models.py b/apps/wpmw/models.py
index c78512f0..2f408b2a 100644
--- a/apps/wpmw/models.py
+++ b/apps/wpmw/models.py
@@ -5,6 +5,7 @@ from apps.utils.models import BaseModel
 from apps.mtm.models import Material
 from rest_framework.exceptions import ParseError
 from apps.wpm.models import WmStateOption
+from apps.utils.tools import update_dict
 
 # Create your models here.
 class Wpr(BaseModel):
@@ -50,6 +51,7 @@ class Wpr(BaseModel):
             except cls.DoesNotExist:
                 ins = cls(number=number)
                 ins.version = -1
+                ins.oinfo = {}
 
         if old_mb and ins.mb != old_mb:
             raise ParseError(f"请检查-{ins.number}-所属仓库批次")
@@ -72,7 +74,6 @@ class Wpr(BaseModel):
             if wm.defect:
                 WprDefect.objects.create(wpr=ins, defect=wm.defect, is_main=True)
         ins.version = ins.version + 1
-        ins.oinfo = ins.oinfo if ins.oinfo else {}
         ins.save()
         if ftest: 
             # 通过检验变更其缺陷项
@@ -84,7 +85,7 @@ class Wpr(BaseModel):
             for ftestitem in FtestItem.objects.filter(ftest=ftest, addto_wpr=True):
                 if ftestitem.test_val_json:
                     oinfo[ftestitem.id] = {"name": ftestitem.testitem.name, "val": ftestitem.test_val_json}
-            ins.oinfo = ins.oinfo.update(oinfo) if ins.oinfo else oinfo
+            ins.oinfo = update_dict(ins.oinfo, oinfo)
             ins.save()
         # if ins.mb and ins.wm:
         #     raise ParseError("所属仓库批次和车间批次不可同时存在2")