大神请问db.collection.where.update......更新数据库内容的时候有没有数量限制？是不是像获取内容一样只能一次更新20条

[图片] 传入的数据 [图片] 内容1 [图片] 内容2 [图片] 云函数： const cloud = require('wx-server-sdk') const nodeExcel = require('excel-export'); const path = require('path');  cloud.init({   env: "lghcloud2-fnker",   traceUser: true }) const db = cloud.database({  env: "lghcloud2-fnker"}) // 云函数入口函数 exports.main = async (event, context) => { if(event.type=='publish'){   var tableMap = {     styleXmlFile:path.join(__dirname,"styles.xml"),     name: Date.now()+"-export",     cols: [],     rows: [],   }   var tableHead = event.dataHead;   //添加表头   for(var i=0;i<tableHead.length;i++){     tableMap.cols[tableMap.cols.length]={       caption:tableHead[i],       type:'string'     }   }   //表体：伪数据   var MtableList = event.Mdatalist   var assMtableList = event.assMdatalist   //添加每一行数据 if(MtableList.length>=assMtableList.length){   for(let i=0;i<assMtableList.length;i++){     tableMap.rows[tableMap.rows.length]=[       MtableList[i].process,       MtableList[i].pieceRate,       assMtableList[i].assprocess,       assMtableList[i].asspieceRate,     ]   }   for(let i=assMtableList.length;i<MtableList.length;i++){     tableMap.rows[tableMap.rows.length]=[       MtableList[i].process,       MtableList[i].pieceRate,"",""     ]   } var name=event.bagname   //保存excelResult到相应位置   var excelResult = nodeExcel.execute(tableMap);   var filePath = "outputExcels";   var fileName = name + '.xlsx';   //图片上传到云存储   return await cloud.uploadFile({     cloudPath: path.join(filePath, fileName),     fileContent: new Buffer(excelResult,'binary')   }).then(res=>{     console.log(res.fileID);     return res;   }).catch(err=>{   }); } } }

我通过云函数添加数据有个字段需要时_openid，但是结果是undefined，别的字段都进去了

wxml中button 向js传值，data-后面名称必须用小写  ，用大写js不识别

  <wxs module="gettime">                var hour = function(data){               console.log("data",data)                var date=getDate(data)                console.log("date",date)                var hour=date.getHours()               console.log("hour",hour)            return  hour            }            var Minutes=function(data){               var date=getDate(Date.parse(data))               var Minutes=date.getMinutes()               return Minutes            }             module.exports = {               hour: hour               Minutes:Minutes             }           </wxs>          <view class="second-1">{{_index+1}}.开始:{{gettime.hour(ringtime.starttime)}}时{{gettime.Minutes(ringtime.starttime)}}分</view><view class="second-1">结束:{{gettime.hour(ringtime.endtime)}}时{{gettime.Minutes(ringtime.endtime)}}分</view>         </view> [图片][图片][图片] [图片][图片] 如图，云函数请求回来的数据可以渲染，js中请求的无法渲染，打印结果如图，大神帮忙看看

[图片] 我想更新endtime,  //res已经获取到     var index=res.data[0].ringtime.length-1                      console.log('index',index)                      db.collection("usersRing").doc(res.data[0]._id).update({                       data: {                         'ringtime'.+[index].endtime:new Date(),                       },                       success: resk =>{                        wx.showToast({                          title: '打卡成功',                          icon: 'success',                        })                      console.log("创建数据成功", resk)                       },                       fail: err => {                         wx.showToast({                           title: '程序出错',                           icon: '',                         })                       }                     })  打印程序出错

 <view  wx:if= {{typeof item.MRinguptime}}=='string'> 报错，希望实现 判断数据是否是字符串 如果是字符串就渲染

const cloud = require('wx-server-sdk') cloud.init({   // API 调用都保持和云函数当前所在环境一致   env: cloud.DYNAMIC_CURRENT_ENV,   traceUser: true }) const db = cloud.database() // 云函数入口函数 exports.main = async (event, context) => {   var docid = event.id   var group = event.group   var salaryperhour = event.salaryperhour   if(group=="users"){          return  await db.collection(group).doc(docid).update({         data: {           salaryperhour:salaryperhour,         }       })   }} js：        wx.cloud.callFunction({             name:"dataset",             data:{               group:"users",               id:that.data.id,               salaryperhour:that.data.salaryperhour             },success:function(){               wx.showToast({                 title: '成功',                 icon: "none",                                })             }           }) 日志： {"errorCode":1,"errorMessage":"user code exception caught","stackTrace":"Error: errCode: -502005 database collection not exists | errMsg: [ResourceNotFound] Db or Table not exist. Please check your request, but if the problem cannot be solved, contact us.; \n at Object.returnAsCloudSDKError (/var/user/node_modules/wx-server-sdk/index.js:6121:16)\n at Object.checkError (/var/user/node_modules/wx-server-sdk/index.js:1418:23)\n at Promise (/var/user/node_modules/wx-server-sdk/index.js:1335:33)\n at process._tickCallback (internal/process/next_tick.js:68:7)"}

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[图片] 如图，左面文字和input内容稍微有点不齐