云函数里面能不能用if这些函数呀，是不是要另外用npm加sdk，要加的话应该怎么加，我是个小白，求大佬们教教我

附上我的云函数代码

const cloud = require(‘wx-server-sdk’)

cloud.init()

const db = cloud.database()

const dbID = cloud.database()

exports.main = async(event, context) => {

if (dbID.collection(‘classcadre’).where({openid: event.userInfo.openId}).get().limits) {

return await db.collection(‘counters’).get()

} else {

return -1

}

报错信息

VM680:1 Error: errCode: -404011 cloud function execution error | errMsg: cloud.callFunction:fail requestID 35db9c53-cec6-11e8-a0e1-525400e8849e, cloud function service error code -504002, error message Missing initializer in const declaration; at cloud.callFunction api;