A full-featured Crystal web framework that catches bugs at compile-time, runs incredibly fast, and helps you write maintainable code.
Lucky is a full-featured web framework for the Crystal programming language that emphasizes safety, performance, and developer productivity. It catches bugs at compile-time through Crystal's type system, provides a type-safe database query layer, and offers conventions to reduce boilerplate. The framework aims to make web development fast and reliable by preventing common errors before runtime.
Web developers familiar with frameworks like Rails who want the performance of a compiled language with strong type safety, and teams prioritizing maintainable, bug-resistant codebases.
Developers choose Lucky for its unique combination of compile-time error detection, exceptional performance from Crystal, and a Rails-like productive workflow. It reduces debugging time and increases confidence through early error catching, while delivering the speed of a natively compiled application.
A full-featured Crystal web framework that catches bugs for you, runs incredibly fast, and helps you write code that lasts.
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Catches routing errors, missing page dependencies, and nil handling during compilation, as shown in the HTML example where forgetting to pass a needed variable fails at compile-time.
Provides autocompletion and validation for column names and types in queries, preventing SQL errors and improving refactoring, evident in the UserQuery example with methods like lower and gt.
Uses Crystal methods for HTML with automatic tag closing and whitespace removal, making templates easy to read and refactor, as demonstrated in the IndexPage code with extracted private methods.
Built on Crystal for native execution speed and low memory usage, ensuring applications are fast without extra optimization, highlighted in the key features as a core design goal.
Crystal has a smaller community and library collection compared to languages like Ruby or JavaScript, which can require custom implementations for some features or integrations.
Requires compilation for every code change, slowing down the feedback loop compared to interpreted frameworks like Rails with hot-reloading, despite tools like lucky watch.
Developers must learn Crystal's statically-typed syntax and concepts, which can be a barrier for those accustomed to dynamic languages, adding initial setup time.
lucky is an open-source alternative to the following products: