AWS Cloud Formation 在创建之前删除资源

Question

I tried to write cloud formation script for creating dynamodb. When i execute script its getting error already exists in stack .

This is my template.

AWSTemplateFormatVersion: "2010-09-09"
Resources: 
  terminationLettersDynamodb:
      Type: 'AWS::DynamoDB::Table'
      DeletionPolicy: Delete
      Properties:
        AttributeDefinitions:
          - AttributeName: schemeId
            AttributeType: S

        KeySchema:
          - AttributeName: schemeId
            KeyType: HASH

        ProvisionedThroughput:
          ReadCapacityUnits: 1
          WriteCapacityUnits: 1
        TableName: "terminationLetters"

Is there any way to delete resource before creating.?

Answer 1

You should avoid using hardcoded table names. If you specify a name, you cannot perform updates that require replacement of this resource.

When leaving out the TableName, you can reference the dynamically created table name elsewhere in your stack with the Ref intrinsic function, eg: Ref "terminationLettersDynamodb"