cognito-idp update-user-pool overwrites lambda triggers

[drvora]

Hi, we want to enable multiple triggers from Cognito to Lambda aliases. While doing so aws CLI overwrites triggers. We were using aws-cli 2.0.31 but tried with latest version (2.4.16) as well with no luck.

Steps to reproduce -

1. Adding PostConfirmation trigger via the following command.
   aws cognito-idp update-user-pool --user-pool-id poolid --lambda-config PostConfirmation=arn:aws:lambda:region:accountno:function:CognitoPostConfirmationFunction-dev:live

2. Verified on AWS Console that pool has Post Confirmation trigger.
   

3. Adding PreSignup trigger via the following command.
   aws cognito-idp update-user-pool --user-pool-id poolid --lambda-config PreSignUp=arn:aws:lambda:region:accountno:function:CognitoPreSignupApproveFunction-dev:live

4. Verified that Post Confirmation is removed and Presignup trigger is shown.
   

5. Setup triggers via AWS Console and verified both triggers are active.
   

We would like to use AWS CLI instead of Console as Console doesn;t allow us to setup trigger to Lambda alias.

[tim-finnigan]

Hi @drvora thanks for reaching out. Have you tried adding both triggers using commas? This approach worked for me:

aws cognito-idp update-user-pool --user-pool-id poolid --lambda-config PostConfirmation=arn:aws:lambda:region:accountno:function:CognitoPostConfirmationFunction-dev:live,PreSignUp=arn:aws:lambda:region:accountno:function:CognitoPreSignupApproveFunction-dev:live

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