node.js - AWS Timestream - SDK V3 Nodejs，TimestreamWriteClient.send() - TypeError : command. resolveMiddleware 不是函数。如何解决这个问题？

Question

我在 NodeJs 14.x 中有以下 lambda 函数，使用 AWS SDK V3 进行时间流插入过程:

'use strict'
// https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-timestream-write/index.html
const { TimestreamWriteClient } = require("@aws-sdk/client-timestream-write")

const client = new TimestreamWriteClient({ region: process.env.region  })


module.exports.fnPostElectricityTimestream = async event => {
  try {
    console.log('🚀 START fnPostElectricityTimestream')

    const jsonBody = event 
    const topic = jsonBody.topic
    const arrTopic = topic.split('/')
    let dbName = arrTopic[4]
    dbName = 'smaj56g' //Test

    const currentTime = Date.now().toString() // Unix time in milliseconds get jsonBody.e_timestamp
    const e_timestamp = (jsonBody.e_timestamp)*1000

    const dimensions = [{
        'Name': 'n',
        'Value': 'v' 
    }]
    const e_ch_1 = {
        'Dimensions':dimensions,
        'MeasureName': 'e_ch_1',
        'MeasureValue': '[1,2,3]',
        'MeasureValueType': 'VARCHAR',
        'Time': currentTime
    }  
    const records = [e_ch_1]
    const params = {
        DatabaseName: dbName,
        TableName:'e_ch_1_v_w',
        Records: records
    }
    const data = await client.send(params);
    console.log('data', data)

    return {
        message: ''
    }
  } catch (error) {
    console.log('🚀 fnPostElectricityTimestream - error.stack:', error.stack)
    return {
        message: error.stack
    }
  }
}

当我运行 lambda 时，这是我收到的消息:

2022-08-12T14:58:39.496Z    e578a391-06b4-48a9-9f9d-9440a373c19e    INFO    🚀 fnPostElectricityTimestream - error.stack: TypeError: command.resolveMiddleware is not a function
    at TimestreamWriteClient.send (/var/task/node_modules/@aws-sdk/smithy-client/dist-cjs/client.js:13:33)
    at Runtime.module.exports.fnPostElectricityTimestream [as handler] (/var/task/src/ElectricityTimestream/fnPostElectricityTimestream.js:38:31)
    at Runtime.handleOnceNonStreaming (/var/runtime/Runtime.js:73:25)

const data = await client.send(params) 有一些东西。我正在关注 this documentation 中的 asyncawait 代码.

如何解决这个问题？

Answer 1

您当前的插入代码有误。为了在TimeStream 中写入记录，您需要使用WriteRecordsCommand 命令。引用doc为了更好地理解。示例代码:

import { TimestreamWriteClient, WriteRecordsCommand } from "@aws-sdk/client-timestream-write";

const client = new TimestreamWriteClient({ region: "REGION" });  //your AWS region
const params = {
  DatabaseName: dbName,       //your database
  TableName: tableName,       //your table name
  Records: records            //records you want to insert
} 

const command = new WriteRecordsCommand(params);
const data = await client.send(command);