Feature request: Support depth levels in feature flag keys

[adriantomas]

Use case

Currently the key of the conditions of the feature flags only support that the values sent in the context are first level.

It would be very interesting to be able to support depth levels, like with a dot attribute access or with a string list of dictionary keys, so that for example a feature flag can be defined based on the raw content of the event without having to transform it or extract something from it.

Solution/User Experience

Context:

{
  "foo": {
    "bar": "premium"
  }
}

Schema:

{
    "premium_feature": {
        "default": false,
        "rules": {
            "customer tier equals premium": {
                "when_match": true,
                "conditions": [
                    {
                        "action": "EQUALS",
                        "key": ["foo", "bar"],
                        "value": "premium"
                    }
                ]
            }
        }
    }
}

Alternative solutions

No response

Acknowledgment

• This feature request meets Powertools for AWS Lambda (Python) Tenets
• Should this be considered in other Powertools for AWS Lambda languages? i.e. Java, TypeScript, and .NET

[leandrodamascena]

Hey @adriantomas! I'm working in some critical issues and will reply to this tomorrow, ok?

Thanks

[adriantomas]

Hey @adriantomas! I'm working in some critical issues and will reply to this tomorrow, ok?

Thanks

Sure, take your time :)

[heitorlessa]

Idea... maybe we could think of using JMESPath like we use in multiple places here. We started simple because we knew customers could pluck those values before calling .evaluate. JMESPath is used in Logger (correlation ID), Idempotency, etc., and it's a string to easy ;)