run lambda function with input parameter in serverless framework command line

Question

I have started a aws project with help of serverless framework, but i have one question regarding run lambda function.

How can I run lambda function with input parameters? I can do it via amazon console, lambda test configuration->test event. but I cannot find a correspondning function in serverless, does anyone know?

Thanks

Alper Karapınar · Accepted Answer · 2016-04-11 19:22:04Z

3

For the lambda part

You can use event.json file:

{
  "principalId": "1234",
  "inputVar": "foo"
}

and then run sls function run.

According to docs, if don't specify any stage, function will run locally, if you do specify a stage, function will run deployed code in corresponding stage. BUT the docs seems outdated, you also need to pass -d flag like:

sls function run myFunction -s dev -d

This command will invoke your deployed lambda function, with parameters from your local event.json file

Here is the source code for function run options.

For APIG integration

There are some samples in documentation.

If you don't want to use templates, you can just insert related code in your s-function.json, inside the endpoint description.

  "endpoints": [
  ...

    "requestTemplates": {
      "application/json": {
        "principalId": "$context.authorizer.principalId",
        "apiKey": "$context.identity.apiKey",
        "inputVar": "$input.json('inputVar')"
      }
    }
  ...
  ]

Syntax is as described in API Gateway Accessing the $input Variable doc.

edited Apr 11, 2016 at 19:22

answered Apr 11, 2016 at 17:52

Alper Karapınar

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3 Comments

huajun li Over a year ago

Thanks Alper, it works for me now. while you metioned -d option, i wonder is there anyway to just upload lambda function and endpoints(api gateway) to amazon without deploy (i mean without create a new version everytime), sometimes, i just want to test if it works on amazon.

Alper Karapınar Over a year ago

afaik no. auto versioning is always triggered. but you can use prune plugin to delete old versions.

Frank Over a year ago

You can deploy one off function $ serverless deploy function -f functionName. It is much faster than deploying the entire project $ serverless deploy. It skips the CloudFront update. Here is some sample code - http://serverless-stack.com/chapters/deploy-the-apis.html

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