const db=wx.cloud.database();

                    console.log("openId",openId);

                    db.collection("userinfo").where({

                        openId : openId

                      }).get({

                        success(res){ 

                        console.log("res",res);  

                          if(res.data.length==0){//判断是否用户是否在信息表存在，如果存在不新增

openId oskUN5hwrBJ7EqZSIwUEI6EkWNlA

login.js? [sm]:147 res {data: Array(0), errMsg: "collection.get:ok"}

login.js? [sm]:149 res.data.length 0