Lambda Layers & Node & require the layer code & sls invoke local

Serverless Framework
20

If you have trouble with this part AWS - Layers: Using your layers,

To use a layer with a function in the same service, use a CloudFormation Ref. The name of your layer in the CloudFormation template will be your layer name TitleCased (without spaces) and have LambdaLayer appended to the end. EG:
the next code will help you.

  • wrong
layers:
  test:
    path: layer
functions:
  hello:
    handler: handler.hello
    layers:
      - { Ref: TestLambdaLayer }
  • right
layers:
  Test:
    path: layer
functions:
  hello:
    handler: handler.hello
    layers:
      - { Ref: TestLambdaLayer }

This phenomenon may happen when layers name is equal to service name. That’s because layers name create zip file (e.g.Test.zip) as well as service name create zip file (e.g.test.zip) when sls deploy with cloudformation info.

I wrote the same issue here.