修复保存是,会将null转为字符串存入

src/utils/dbUitls.js

@@ -28,7 +28,7 @@ const insert = ({table, form}) => {
           v = JSON.stringify(v)
           v = v.replace(/(')/g, "\\$1")
         }
-      }
+      } else v = ''
       return `${e}='${v}'`
     })
     sql = `update ${table} set ${arr.join(",")} where id='${form.id}'`