# Cerbos v0.19.0

## Highlights

The `PlanResources` API now validates requests using [schemas](https://docs.cerbos.dev/cerbos/0.46.0/policies/schemas) to flag any invalid or unknown attributes. Similar to the `CheckResources` API, the [schema enforcement level](https://docs.cerbos.dev/cerbos/0.46.0/configuration/schema) defined in the configuration file determines whether invalid requests are processed with warnings or completely rejected.

This release also includes several fixes to the `PlanResources` output to simplify the plan produced for expressions that make use of higher-order functions like `in` and `exists`. The AST produced for logical operators like `and` and `or` is now more consistent regardless of the operator used as well.

Distributed traces can now be exported to collectors that support [OTLP](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/protocol/otlp.md) by using the new [`otlp` exporter](https://docs.cerbos.dev/cerbos/0.46.0/configuration/tracing#otlp). Thanks to community member @rcrowe for contributing this feature.

## Changelog

### Bug Fixes

- Avoid short-circuit when expressions access non-existent attributes ( [#1056](https://github.com/cerbos/cerbos/pull/1056))

- Handle missing scopes in playground validate API ( [#1042](https://github.com/cerbos/cerbos/pull/1042))

- Transform `&&`/`||` to `and`/`or` in ASTs ( [#1021](https://github.com/cerbos/cerbos/pull/1021))

- Transform maps to lists for membership test ( [#1032](https://github.com/cerbos/cerbos/pull/1032))

- Transform maps to lists in comprehension expressions ( [#1044](https://github.com/cerbos/cerbos/pull/1044))

- Transform membership test in empty list to false ( [#1059](https://github.com/cerbos/cerbos/pull/1059))

### Enhancements

- Export traces via OTLP to a collector ( [#1017](https://github.com/cerbos/cerbos/pull/1017))

- Output detailed index build errors when the number of errors is low ( [#1038](https://github.com/cerbos/cerbos/pull/1038))

- Validate schemas when planning queries ( [#1013](https://github.com/cerbos/cerbos/pull/1013))

### Documentation

- Add AWS Cognito integration demo docs ( [#1037](https://github.com/cerbos/cerbos/pull/1037))

- Updating customer logos ( [#1054](https://github.com/cerbos/cerbos/pull/1054))

- Use analogy to explain derived roles ( [#1015](https://github.com/cerbos/cerbos/pull/1015))

### Chores

- Add function to compile a set of files ( [#1046](https://github.com/cerbos/cerbos/pull/1046))

- Bump version to 0.19.0

- Fix confdocs panic when no struct tag is provided ( [#1020](https://github.com/cerbos/cerbos/pull/1020))

- Fix flaky query plan test by sorting map keys in deterministic order ( [#1043](https://github.com/cerbos/cerbos/pull/1043))

- Fix flaky update store test ( [#1045](https://github.com/cerbos/cerbos/pull/1045))