How does Alba compare to Blueprinter?

Alba is faster and dependency-free, while Blueprinter offers JSON:API via extensions; Alba has more built-in features like type validation, but Blueprinter might be simpler for basic use.

How to migrate from ActiveModelSerializers to Alba?

Use the alba_migration gem for automatic conversion of AMS serializer classes, but manual adjustments may be needed for edge cases and new Alba-specific features.

Does Alba work with Rails?

Yes, set the backend to :active_support or :oj_rails in an initializer for compatibility, and it integrates smoothly with ActiveRecord associations and params.

How to handle nil values in Alba?

Use the on_nil DSL to convert nil to defaults like empty strings or custom values, providing flexible error handling without crashing serialization.

Can Alba serialize to a hash instead of JSON?

Yes, call to_h or serializable_hash on the resource object to get a Ruby hash, useful for further processing or debugging serialized data.

What's the performance impact of Alba's type validation?

Type validation adds overhead but ensures data integrity; for maximum speed, disable auto conversion or use custom types sparingly in hot paths.

alba

MITRubyv3.10.0

A fast, easy, and feature-rich JSON serializer for Ruby, JRuby, and TruffleRuby with no runtime dependencies.

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1.2k stars59 forks0 contributors

What is alba?

Alba is a JSON serializer for Ruby, JRuby, and TruffleRuby that converts Ruby objects into JSON format. It solves the problem of efficiently serializing data for APIs and web applications with a focus on speed, ease of use, and a comprehensive feature set without external dependencies.

Target Audience

Ruby developers building APIs, web applications, or any service requiring JSON serialization, particularly those seeking a performant and dependency-free alternative to libraries like ActiveModelSerializers.

Value Proposition

Developers choose Alba for its combination of high performance, rich features like type validation and key transformation, and zero runtime dependencies, offering a streamlined and maintainable serialization solution.

Overview

Alba is a JSON serializer for Ruby, JRuby and TruffleRuby.

Use Cases

Best For

Building JSON APIs in Ruby applications
Serializing complex object graphs with associations

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Projects requiring fast JSON serialization without external gem dependencies

Applications needing key transformation (e.g., camelCase to snake_case)

Handling circular references in serialized data

Adding type validation and coercion to serialized attributes

Not Ideal For

Projects requiring full JSON:API compliance out-of-the-box without manual implementation
Rails applications heavily reliant on built-in fragment caching for serialized responses
Teams migrating from ActiveModelSerializers who need a zero-effort drop-in replacement
Simple CRUD APIs where basic Rails `to_json` or JBuilder meets all needs without added complexity

Pros & Cons

Pros

Blazing Fast Performance

Benchmarks show Alba outperforms alternatives like ActiveModelSerializers, optimized for speed without requiring external gems such as oj.

Zero Runtime Dependencies

Works out-of-the-box without dependencies on activesupport or oj, reducing bundle bloat and compatibility issues.

Comprehensive Feature Set

Includes advanced features like type validation, circular association control with 'within', and layout support, as detailed in the README's comparison table.

Active Maintenance

Frequently updated with high test coverage (99%) and active discussions on GitHub, ensuring reliability and community support.

Cons

No Built-in Caching

Lacks caching support, a notable omission for high-traffic APIs where serializers like AMS or JBuilder offer fragment caching.

Version Instability Risks

The IMPORTANT NOTICE warns of bugs in recent releases (e.g., v3.0.0), requiring manual upgrades and posing potential production hiccups.

Complex DSL Overhead

Features like traits, helper modules, and inference can make the DSL overwhelming for simple serialization tasks compared to minimalist alternatives.

Open Source Alternative To

alba is an open-source alternative to the following products:

B

Blueprinter

Blueprinter is a Ruby library for generating JSON API responses using simple, reusable templates called blueprints that define how objects should be serialized.

A

ActiveModelSerializers

A Ruby gem for serializing Active Model objects into JSON, providing a convention-over-configuration approach to building APIs.

JSONAPI::Serializer

JSONAPI::Serializer is a Ruby library that implements the JSON:API specification for serializing and deserializing JSON API documents.

J

JBuilder

JBuilder was a popular integrated development environment (IDE) for Java development, originally created by Borland and later acquired by Embarcadero.

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