Extracting logic from templates with Hanami Views
summary
Hanami extracts template logic into Ruby objects so form rendering stays declarative: the Hanami View gem (2.1) is framework‑agnostic and provides Parts (decorators) and Scopes that compute locals, format errors, pick icons, and build control CSS classes. The demo shows a registration form refactored into a RegistrationPart that returns scope instances which render one reusable partial per input; it reduces template branching, is fully optional, and the extracted pieces are easily unit tested and reusable.
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chapters (10)
- 0:00Introduction and motivation
- 2:14What is Hanami framework
- 4:26Ruby and Rails issues
- 8:42Hanami View introduction
- 9:48Logic in templates problem
- 13:02Form errors extraction
- 15:34Form input logic extraction
- 19:59Using Scopes for partials
- 22:12Decorating form inputs
- 25:08Conclusion and takeaways
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