AWS Lambda运行报错Cannot find module 'stripe'问题排查

Amplify托管的后端应用调用Lambda函数时抛出模块找不到错误：

Error: Cannot find module 'stripe'
Require stack:

• /var/task/index.js
• /var/runtime/UserFunction.js
• /var/runtime/index.js

• 已在项目根目录安装stripe包，根目录依赖列表可查，但目标Lambda函数目录的依赖中无stripe
• 尝试在functions文件夹下安装stripe后问题未解决
• 当前环境版本：React 17.0.2，stripe 9.6.0

关联代码 #

Lambda函数源码 #

const aws = require('aws-sdk');
const ddb = new aws.DynamoDB({apiVersion: '2012-10-08'});
const stripe = require('stripe')('secret key');

/**
 * @type {import('@types/aws-lambda').APIGatewayProxyHandler}
 */


exports.handler = async (event) => {

    try {
        const tableName = process.env.tableName
        const {username, email} = event.arguments.input

        const account = await stripe.accounts.create({
            type: 'express',
            email: `${email}`,
            metadata: {user: `${username}`}
        });

        console.log("Account creation response: ", account)
        console.log("Account id: ", account.id)

        // 存储Stripe账号ID到DynamoDB
        let ddbParams = {
            Item: {
                'stripe_id': `${account.id}`
            },
            TableName: tableName
        }
        
        try {
            await ddb.putItem(ddbParams).promise()
            console.log("Successfully updated stripe_id field")
        } catch (err) {
            console.log("Storing to DB error: ", err)
        }

        const accountId = account.id

        const accountLink = await stripe.accountLinks.create({
            account: accountId,
            // 上线时替换为正式站点地址
            refresh_url: 'http://localhost:3000/profile',
            return_url: 'http://localhost:3000/listingform',
            type: 'account_onboarding',
          });

          console.log('Account link response :', accountLink)

          return accountLink
    } catch (err) {
        throw new Error(err)
    }

};

初始函数package.json配置 #

函数目录初始未声明stripe依赖，配置如下：

{
  "name": "createStripeConnectAccount",
  "version": "2.0.0",
  "description": "Lambda function generated by Amplify",
  "main": "index.js",
  "license": "Apache-2.0",
  "devDependencies": {
    "@types/aws-lambda": "^8.10.92"
  }
}

问题更新 #

已将stripe添加到函数目录的dependencies依赖中，仍触发相同报错，更新后的package.json如下：

{
  "name": "createStripeConnectAccount",
  "version": "2.0.0",
  "description": "Lambda function generated by Amplify",
  "main": "index.js",
  "license": "Apache-2.0",
  "devDependencies": {
    "@types/aws-lambda": "^8.10.92"
  },
  "dependencies": {
    "save": "^2.5.0",
    "stripe": "^9.6.0"
  }
}

问题根源是Amplify对Lambda函数的依赖打包逻辑：Amplify只会读取、打包单个函数专属目录下的依赖，项目根目录、functions总目录下安装的依赖不会被打包进Lambda部署包，且旧的部署缓存会导致新安装的依赖不生效。按以下步骤操作即可修复：

1. 进入目标函数的专属本地目录，路径格式为amplify/backend/function/createStripeConnectAccount/
2. 删除该目录下的node_modules文件夹和package-lock.json文件，执行npm install重新安装所有依赖，安装完成后确认当前目录下node_modules内存在stripe文件夹
3. 返回项目根目录，执行amplify push --force强制跳过缓存重新打包部署所有资源
4. 如果仍报错，执行amplify update function，选择对应函数，进入高级配置项，确认已开启「打包本地node_modules依赖」选项，保存后重新推送即可

内容的提问来源于stack exchange，提问作者Zio-4