Serverless move s3 bucket reference to Resources - serverless-framework

Question

Situation
It's pretty simple. I want to have more fine-tuned control of the s3 buckets created by serverless by managing them in the Resources section. I used to reference the bucket like this:
my-function:
handler: src/functions/my-function.handler
events:
- s3:
bucket: my-bucket-${opt:stage,self:provider.stage}
But now I want to reference it like this:
my-function:
handler: src/functions/my-function.handler
events:
- s3:
bucket: ${self:resources.Resources.MyBucket.Properties.BucketName}
...
Resources:
MyBucket:
Type: AWS::S3::Bucket
Properties:
BucketName: my-bucket-${self:provider.stage}
My understanding is that this will allow me more configuration options, let me include the bucket in outputs, etc...
However, I get this error when deploying to my dev stage:
MyBucket - my-bucket-dev already exists in stack <stack info>
Question
Is there a way I can make this syntax change in Serverless without it throwing an error? I also didn't want to use existing: true because I'll be deploying to stages where the bucket won't exist

Answer 1

You need to match the Logical IDs for the bucket and lambda permission.
See this example taken from the docs:
functions:
resize:
handler: resize.handler
events:
- s3: photos
resources:
Resources:
S3BucketPhotos:
Type: AWS::S3::Bucket
Properties:
BucketName: my-custom-bucket-name
# add additional custom bucket configuration here
ResizeLambdaPermissionPhotosS3:
Type: 'AWS::Lambda::Permission'
Properties:
FunctionName:
'Fn::GetAtt':
- ResizeLambdaFunction
- Arn
Principal: 's3.amazonaws.com'
Action: 'lambda:InvokeFunction'
SourceAccount:
Ref: AWS::AccountId
SourceArn: 'arn:aws:s3:::my-custom-bucket-name'
https://serverless.com/framework/docs/providers/aws/events/s3#custom-bucket-configuration