//LOG是云开发数据集合，流程是先去数据库中查询是否有该数据，没有才写入。测试时都正常的，试用时却有几笔重复的 LOG.where({ NAME: username, IDCARD: userID }).count({     success: function (res) {     if (res.total > 0) {         wx.showToast({         title: '该客户己登记',         icon: 'none',         duration: 2000,         mask: true     })     }else{         LOG.add({         data: {             IDCARD: userID,             NAME: username,         },         success(res) {             wx.showToast({                 title: '成功',                 icon: 'succes',                 duration: 2000,                 mask: true             })         }     }) } }