Bug: Temp keys no longer being merged when appended to logger #4838
Description
Expected Behavior
Say we have an instance of logger and we've used appendKeys() to add an object obj to it.
In 2.28.1, if we then append obj to logger again, the existing obj is merged with the one being added. For example:
logger.appendKeys({ obj: { key1: 'value' } })
logger.appendKeys({ obj: { key2: 'value' } })
logger.critical('')
// -> { ... "obj":{"key1":"value","key2":"value"}}Current Behavior
In 2.29.0, the existing obj is replaced by the one being added. For example:
logger.appendKeys({ obj: { key1: 'value' } })
logger.appendKeys({ obj: { key2: 'value' } })
logger.critical('')
// -> { ... "obj":{"key2":"value"}}Note that this does not happen with persistent keys in either 2.28.1 or 2.29.0:
logger.appendPersistentKeys({ obj: { key1: 'value' } })
logger.appendPersistentKeys({ obj: { key2: 'value' } })
logger.critical('')
// -> { ... "obj":{"key1":"value","key2":"value"}}Code snippet
import { Logger } from '@aws-lambda-powertools/logger'
const logger = new Logger()
logger.appendKeys({ obj: { key1: 'value' } })
logger.appendKeys({ obj: { key2: 'value' } })
logger.critical('')Steps to Reproduce
See above.
Possible Solution
No response
Powertools for AWS Lambda (TypeScript) version
latest
AWS Lambda function runtime
22.x
Packaging format used
Lambda Layers