<h2>Overview</h2>
action_args is a powerful Rails plugin that enhances your controller action methods by allowing you to clearly define and manage the parameters needed for each action. Inspired by the Merb ecosystem, this plugin enables Rails developers to adopt a more natural Ruby syntax when handling requests, making it easier to specify and manipulate parameters directly in the method definitions. This structured approach to action parameters simplifies the way Rails applications communicate with their APIs.
When integrated into your Rails application, action_args not only streamlines the development process but also improves code readability and maintainability. The ability to declare required and optional parameters, as well as the compatibility with Rails 4 StrongParameters, ensures that developers can create clean and efficient controllers while adhering to best practices.
<h2>Features</h2>
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Required Parameters (:req): Easily define required parameters that must be present in the params Hash, with automatic handling of missing values through informative error messages.
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Optional Parameters (:opt): Set default values for optional parameters, allowing flexibility without the need for explicit checks in your code.
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Keyword Arguments (:key): Use Ruby 2.0-style keyword arguments for a more modern and readable method signature for your action methods.
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StrongParameters Integration: Seamlessly works with Rails 4 StrongParameters, allowing you to manage permitted parameters in a clean and consistent manner.
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Declarative Allow-listing: Utilize action_args’ declarative permits method to simplify and centralize parameter permitting, reducing redundancy in your controller classes.
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_params Convention: Leverage the _params suffix to align your method signatures with Rails’ scaffold naming conventions, enhancing compatibility and simplifying migration from legacy controllers.
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Asakusarb

Action_args