Linting exception for valid SAM Api resource

cfn-lint version: 0.27.1

Description of issue

RestApiId is not recognised as a valid type for type AWS::Serverless::Function

AWSTemplateFormatVersion: 2010-09-09

Transform: AWS::Serverless-2016-10-31

Description: The cloudformation includes all lambda definitions.

Globals:
  Function:
    Runtime: go1.x
    Timeout: 5
    Handler: main

Parameters:
  AllowedCORSDomain:
    Type: String
  ParentStackName:
    Type: String
  ApiGatewayStageName:
    Type: String
  StripePrivateKey:
    Type: String

Resources:
  HelloWorldFunction:
    Properties:
      CodeUri: ../go/lambda/hello-world/
      Events:
        Api:
          Properties:
            Method: Get
            Path: /
            RestApiId:
              Ref: ApiGateway
          Type: Api
      FunctionName: Hello-world
    Type: AWS::Serverless::Function

  ApiGateway:
    Properties:
      Cors:
        AllowMethods: "'OPTIONS,POST,GET'"
        AllowHeaders: "'Content-Type'"
        AllowOrigin: !Ref AllowedCORSDomain
      DefinitionBody:
        openapi: '3.0'
        bathPath: /
        schemes:
          - https
        paths:
          /hello:
            get:
              responses:
                '200': {}
              x-amazon-apigateway-integration:
                type: 'aws_proxy'
                httpMethod: 'POST'
                uri: !Sub arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${HelloWorldFunction.Arn}/invocations
      MethodSettings:
        - DataTraceEnabled: true
          HttpMethod: "*"
          LoggingLevel: INFO
          MetricsEnabled: true
          ResourcePath: /*
      Name: Hello-world-ApiGateway
      OpenApiVersion: '2.0'
      StageName: dev
    Type: AWS::Serverless::Api

The way of setting APIGateway comes from aws document.

Error:

Error transforming template: unhashable type: 'dict_node' [E0001]. 

If comment out RestApiId: !Ref ApiGateway, then works.

[JustinLiang90]

can you do a pip list and tell me what version of aws-sam-translator you have?

@kddejong aws-sam-translator version is 1.20.1

I haven’t been able to replicate the issue so I’m wondering if you have a different version of that package than I do.

Sorry, I updated the template. so now, you should see the error, and if I comment out

RestApiId:
  Ref: ApiGateway

or FunctionName: Hello-world, then it will work

[kddejong]

@JustinLiang90 can you do a pip list and tell me what version of aws-sam-translator you have?

E0001 on a SAM translator are the result of us getting an error back from that package. I haven’t been able to replicate the issue so I’m wondering if you have a different version of that package than I do.