Repository Pattern with Hygienic Macros in Scheme – Lisp

4 days ago

The author addresses a common anti-pattern in their Scheme projects: tight coupling between the controller layer and SQLite implementation.
They implemented the Repository Pattern to decouple the data layer from the controller layer using Scheme's hygienic macros.
Two main macros were created: 'define-record-with-kw' for keyword-argument constructors and 'define-repo-method' for flexible eDSL definitions.
A domain eDSL example for a 'projects' entity demonstrates how to define records and repository methods.
A concrete SQLite implementation using Artanis is provided, showing how the repository pattern decouples database logic from application logic.
The approach supports keyword arguments and variable arity, improving ergonomics and testability.
The author seeks feedback on this implementation for further improvement and plans to use it across projects.

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