Serverless framework TypeError: e is not a function

问题

I'm using serverless-framework to schedule tasks in AWS.

My application structure is

|- src
   |- tasks
      |- analytics.task.js
|- tasks.js
|- serverless.yml

The contents of analytics.task.js

module.exports.run = (event, context, callback) => {
    console.log('Getting data...');

    console.log('success');
};

Removed all other codes from the run method for testing purpose.

content of tasks.js

const analyticsTask = require('./src/tasks/analytics.task');

module.exports.analytics = analyticsTask.run();

and content of serverless.yml

functions:
  analyticsDataProcess:
    handler: tasks.analytics
    description: 'Send analytics data to the backend server'
    events:
      - schedule:
          name: analytics-data-process-task
          description: 'Send analytics data every minute'
          rate: rate(1 minute)
          enabled: true

But when running the task, it is giving an error

{
    "errorMessage": "e is not a function",
    "errorType": "TypeError",
    "stackTrace": [
        "TypeError: e is not a function",
        "    at /home/user/code/user/qcg-app/serverless_sdk/index.js:9:88073",
        "    at resolve (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/lib/plugins/aws/invokeLocal/index.js:692:30)",
        "    at Promise._execute (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/node_modules/bluebird/js/release/debuggability.js:411:9)",
        "    at Promise._resolveFromExecutor (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/node_modules/bluebird/js/release/promise.js:518:18)",
        "    at new Promise (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/node_modules/bluebird/js/release/promise.js:103:10)",
        "    at AwsInvokeLocal.invokeLocalNodeJs (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/lib/plugins/aws/invokeLocal/index.js:645:12)",
        "    at AwsInvokeLocal.invokeLocal (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/lib/plugins/aws/invokeLocal/index.js:155:19)",
        "    at AwsInvokeLocal.tryCatcher (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/node_modules/bluebird/js/release/util.js:16:23)",
        "    at Promise._settlePromiseFromHandler (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/node_modules/bluebird/js/release/promise.js:547:31)",
        "    at Promise._settlePromise (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/node_modules/bluebird/js/release/promise.js:604:18)",
        "    at Promise._settlePromiseCtx (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/node_modules/bluebird/js/release/promise.js:641:10)",
        "    at _drainQueueStep (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/node_modules/bluebird/js/release/async.js:97:12)",
        "    at _drainQueue (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/node_modules/bluebird/js/release/async.js:86:9)",
        "    at Async._drainQueues (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/node_modules/bluebird/js/release/async.js:102:5)",
        "    at Immediate.Async.drainQueues [as _onImmediate] (/home/user/.nvm/versions/node/v10.15.3/lib/node_modules/serverless/node_modules/bluebird/js/release/async.js:15:14)",
        "    at runCallback (timers.js:705:18)",
        "    at tryOnImmediate (timers.js:676:5)",
        "    at processImmediate (timers.js:658:5)",
        "    at process.topLevelDomainCallback (domain.js:120:23)"
    ]
}

回答1:

Okay there seems to be a few things going on here.

First, it's expected that your handler returns a function that can be called by lambda. In this case, you're calling the handler instead of returning the function to be called by lambda.

To solve this problem, remove the parenthesis after run in task.js

const analyticsTask = require('./src/tasks/analytics.task');

module.exports.analytics = analyticsTask.run;

There's another issue - lambda handlers need to be asynchronous functions. So you'll need to add async in front of the function exported as run in analytics.task.js. Now you can remove the callback argument. The alternative would be to omit async, but actually call the callback. Since we tend to prefer newer node syntax, let's remove the callback arg in favor of async.

module.exports.run = async (event, context) => {
    console.log('Getting data...');

    console.log('success');
};

来源：https://stackoverflow.com/questions/58623612/serverless-framework-typeerror-e-is-not-a-function

标签

serverless-framework

Serverless