出现未知错误？
msg:ERROR RequestId:79ade618-9965-11ea-ac2d-5254009533ea Result:{"errCode":1,"errMsg":"user code exception caught","stackTrace":"docId必须为字符串或数字\nError: docId必须为字符串或数字\n at CollectionReference.doc (/var/user/node_modules/@cloudbase/database/dist/commonjs/collection.js:15:19)\n at CollectionReference.doc (/var/user/node_modules/wx-server-sdk/index.js:1176:66)\n at refreshContact (/var/user/index.js:794:47)\n at EventHandler.exports.main [as realHandler] (/var/user/index.js:54:14)\n at EventHandler.handle (/var/runtime/node8/bootstrap.js:402:28)\n at invoke (/var/runtime/node8/bootstrap.js:205:22)\n at Timeout.setTimeout [as _onTimeout] (/var/runtime/node8/bootstrap.js:137:9)\n at ontimeout (timers.js:475:11)\n at tryOnTimeout (timers.js:310:5)\n at Timer.listOnTimeout (timers.js:270:5)"}