onAdd: function() {   console.log("data:", this.data)   const db = wx.cloud.database()   db.collection('MtTrip').add({       data: {         tripDriver: app.globalData.userInfo.nickName,         cTime: new Date(),         tripTime: this.data.time,         tripFrom: this.data.placeFrom[this.data.index1],         tripTo: this.data.placeTo[this.data.index2],         tripSeat: this.data.seat[this.data.index4],         tripState: "new",         tripOpenid: app.globalData.openid       }     })     .then(res => {       console.log(res)     })   },

上面其中"tripOpenid: app.globalData.openid"这一个数据怎么都添加不到数据库中,没有报错,也没有提示,就是从云开发控制台看数据写入结果没有这一条.

求解~