I m trying to create an SSM parameter but it requires a `Con Serverless Stack #help

I'm trying to create an SSM parameter, but it requ...

Michael Wolfenden

03/29/2021, 11:36 PM

I'm trying to create an SSM parameter, but it requires a

Construct

. What do I pass?

Copy code

import * as sst from '@serverless-stack/resources'
import * as ssm from '@aws-cdk/aws-ssm'

export default class MyStack extends sst.Stack {
  constructor(scope: <http://sst.App|sst.App>, id: string, props?: sst.StackProps) {
    super(scope, id, props)

    new ssm.StringParameter(
        /* what do I pass here, it requires a Constuct */
    )
}

Frank

03/29/2021, 11:42 PM

Pass in

this

, which is the stack construct. So this ssm resource belongs to this CloudFormation stack.

Copy code

new ssm.StringParameter(this, "MyParameter", { ... })

Michael Wolfenden

03/29/2021, 11:59 PM

Copy code

Argument of type 'this' is not assignable to parameter of type 'Construct'.
  Type 'MyStack' is not assignable to type 'Construct'.
    Property 'onValidate' is protected but type 'Construct' is not a class derived from 'Construct'.ts(2345)

Michael Wolfenden

03/30/2021, 12:01 AM

Has an update broken this .. my versions are:

Copy code

"devDependencies": {
  "@aws-cdk/assert": "1.95.1",
  "@aws-cdk/aws-ssm": "1.95.1",
  "@types/aws-lambda": "^8.10.73"
},
"dependencies": {
  "@aws-cdk/core": "1.95.1",
  "@serverless-stack/cli": "0.10.6",
  "@serverless-stack/resources": "0.10.6"
}

Frank

03/30/2021, 1:59 AM

Can you change all the “1.95.1” versions to “1.94.1"?

Frank

03/30/2021, 1:59 AM

do a npm/yarn install and try building again?

Frank

03/30/2021, 2:00 AM

This worked for me

Copy code

new ssm.StringParameter(this, "Param", {
      stringValue: 'Foo',
    });

Michael Wolfenden

03/30/2021, 5:10 AM

1.94.1

works,

1.95.1

doesn't

Frank

03/30/2021, 6:39 PM

hmm.. that’s weird. We will be updating the CDK versions soon.

Frank

03/30/2021, 6:41 PM

Btw, use the

add-cdk

command to add cdk dependencies, ie.

Copy code

$ npx sst add-cdk @aws-cdk/aws-ssm

SST will install the supported version and updates your

package.json

Ross Coundon

03/30/2021, 9:00 PM

FYI - I just encountered the same problem with CfnAccessKey

Frank

03/30/2021, 9:08 PM

Thanks for the headsup @Ross Coundon

Frank

03/30/2021, 9:09 PM

Currently SST shows a warning for packages that are of a different CDK version. I wonder if we should throw an error, and forces u to keep the version in sync. 🤔

Ross Coundon

03/30/2021, 9:10 PM

the odd thing here was it complained that the versions were mismatched

Copy code

Mismatched versions of AWS CDK packages. Serverless Stack currently supports 1.94.1. Fix using:

  npm install @aws-cdk/aws-iam@1.94.1 @aws-cdk/core@1.94.1 --save-exact

However, 1.94.1 is the actual version in package json

Frank

03/30/2021, 9:12 PM

oh.. lemme check how we are checking for versions right now

Frank

03/30/2021, 9:16 PM

that’s weird.. i’m looking at the code, SST loads up your

package.json

, loop through each dependency and dev dependency that starts with “@aws-sdk” and check if version is not, in this case, 1.94.1

Frank

03/30/2021, 9:18 PM

did u manage to fix it by running

npm install @aws-cdk/aws-iam@1.94.1 @aws-cdk/core@1.94.1 --save-exact

Ross Coundon

03/30/2021, 9:18 PM

Weird! The dependencies in package.json look like:

Ross Coundon

03/30/2021, 9:19 PM

I ran

npx sst add-cdk @aws-cdk/aws-ssm

Frank

03/30/2021, 9:19 PM

oh it actually expects the exact version, not with the caret

Ross Coundon

03/30/2021, 9:19 PM

ah, makes sense

Frank

03/30/2021, 9:21 PM

this is annoying.. they are going to restructure CDK in v2.0 and we will be able to add it as a peer dependency by then. Hopefully the version mismatch will be solved.

Open in Slack

Previous Next