Toucan

Drastically reduces boilerplate for common operations like selecting fields or single records, as shown with db/select-one-field versus verbose jdbc and HoneySQL code.

Enables automatic type conversions and custom logic on insert/retrieve via model definitions, such as handling keyword-to-string conversion for status fields without manual intervention.

Efficiently fetches and nests related objects with minimal database calls, simplifying API response construction as demonstrated with venue and category hydration.

Provides macros like with-temp for creating temporary test objects that clean up automatically, ensuring test isolation without polluting the database state.

Builds on HoneySQL for expressive SQL generation, allowing complex queries while maintaining Clojure's functional style, without limiting flexibility.