A Rails form builder with a simple DSL that generates forms without imposing markup opinions.
Simple Form is a Ruby gem for Rails that provides a streamlined DSL for building web forms. It automates the generation of form elements like labels, inputs, hints, and error messages while allowing complete control over the HTML markup. It solves the repetitive boilerplate code in Rails forms by offering sensible defaults that can be easily customized.
Rails developers who want to build forms quickly without being locked into a specific markup structure, especially those working with Bootstrap or Foundation frameworks.
Developers choose Simple Form for its balance of convenience and flexibility—it reduces form-building boilerplate with intelligent defaults and a clean DSL, yet doesn't impose styling decisions, making it easy to integrate with any design system.
Forms made easy for Rails! It's tied to a simple DSL, with no opinion on markup.
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Inherits from Formtastic with an intuitive syntax like `f.input :username`, enabling rapid form building while maintaining Rails helper compatibility.
Maps database column types to sensible HTML inputs, such as using a textarea for text columns, reducing manual specification as shown in the mapping table.
Offers full control over HTML markup via the wrappers API, allowing developers to define custom structures for labels, inputs, hints, and errors.
Supports comprehensive internationalization for labels, hints, placeholders, and options, with detailed locale file examples for multi-language forms.
Includes install generators for Bootstrap 5 and Zurb Foundation, providing pre-configured wrappers to align with popular CSS frameworks out-of-the-box.
The association helper is primarily tested with Active Record and may not work well with other ORMs like Mongoid, as the README admits limited support.
Setting up custom wrappers and inputs requires understanding a complex DSL and initializer configuration, which can be daunting for simple or one-off forms.
It's tightly coupled to Rails, making it unsuitable for projects using other web frameworks or those transitioning away from Ruby on Rails.