AWS lambda index.js文件中的语法错误

我不断收到来自AWS lambda的错误。 我不知道这是一个什么样的语法错误。可以请任何人解释可能发生的事情吗？

Syntax error in module 'index': SyntaxError at exports.runInThisContext (vm.js:53:16) at Module._compile (module.js:373:25) at Object.Module._extensions..js (module.js:416:10) at Module.load (module.js:343:32) at Function.Module._load (module.js:300:12) at Module.require (module.js:353:17) at require (internal/module.js:12:17) at Object.<anonymous> (/var/task/index.js:60:14) at Module._compile (module.js:409:26) at Object.Module._extensions..js (module.js:416:10) 

这是我的第60行的Index.js文件：

 var DocumentDBClient = require('documentdb').DocumentClient; var HttpStatusCodes = { NOTFOUND: 404 }; var config = require('./config'); var dbTask = require('./Task'); // <-- index.js line 60 

这是我的Task.js文件：

 var DocumentDBClient = require('documentdb').DocumentClient; var docdbUtils = require('./DBUtils'); function Task(documentDBClient, databaseId, collectionId) { this.client = documentDBClient; this.databaseId = databaseId; this.collectionId = collectionId; this.databaseUrl = `dbs/${databaseId}`; this.collectionUrl = `${this.databaseUrl}/colls/${collectionId}`; this.database = null; this.collection = null; } Task.prototype = { init: function (callback) { var self = this; docdbUtils.getOrCreateDatabase(self.client, self.databaseId, function (err, db) { if (err) { callback(err); } else { self.database = db; docdbUtils.getOrCreateCollection(self.client, self.database._self, self.collectionId, function (err, coll) { if (err) { callback(err); } else { self.collection = coll; } }); } }); }, find: function (querySpec, callback) { var self = this; self.client.queryDocuments(self.collectionUrl, querySpec).toArray(function (err, results) { if (err) { callback(err); } else { callback(null, results); } }); }, updateDocument: function (item, callback) { var self = this; let documentUrl = `${this.collectionUrl}/docs/${item.id}`; self.getDocument(item, function (err, doc) { if (err) { callback(err); } else { self.client.replaceDocument(documentUrl, item, function (err, replaced) { if (err) { callback(err,null); } else { callback(null, replaced); } }); } }); }, getDocument: function (itemId, callback) { var self = this; var querySpec = { query: 'SELECT * FROM root r WHERE r.id = @id', parameters: [{ name: '@id', value: itemId }] }; self.client.queryDocuments(self.collectionUrl, querySpec).toArray(function (err, results) { if (err) { callback(err); } else { if(results.length > 0) callback(null, results[0]); else callback(null, null); } }); }, addDocument: function (item, callback) { var self = this; self.client.createDocument(self.collectionUrl, item, function (err, doc) { if (err) { callback(err); } else { callback(null, doc); } }); }, //Queries getUserPrimary : function (itemId, callback){ var self = this; var querySpec = { query: 'SELECT VALUE r.primary FROM root r WHERE r.id = @id', parameters: [{ name: '@id', value: itemId }] }; self.client.queryDocuments(self.collectionUrl, querySpec).toArray(function (err, results) { if (err) { callback(err); } else { callback(null, results[0]); } }); }, getUserAll : function (itemId, callback){ var self = this; var querySpec = { query: 'SELECT VALUE r.ABCD FROM root r WHERE r.id = @id', parameters: [{ name: '@id', value: itemId }] }; self.client.queryDocuments(self.collectionUrl, querySpec).toArray(function (err, results) { if (err) { callback(err); } else { callback(null, results); } }); }, }; module.exports = Task;