This is a port of the gem [sinatra-param](https://github.com/mattt/sinatra-param) for the Rails framework.
## Introduction
Rails makes it easy to deal with HTTP parameters when they are linked to a model or an ActiveModel class.
If you are building a complex search form, don’t hesitate to link it to a non-persistent ActiveModel class, like ActiveModel::Model. There are many resources on the Web to learn this kind of good practices, and stay in the “thin controller” rule.
But sometimes, it’s not practical to create an external class just to validate and convert a few parameters. In this case, you may use this gem which allows you to easily do validations and conversion of your params directly in your controller actions using a simple method call.
## Credits
This is originally a port of the gem [sinatra-param](https://github.com/mattt/sinatra-param) for the Rails framework.
All the credits go to [@mattt](https://twitter.com/mattt).
It has all the features of the sinatra-param gem, I used bang methods (like param!) to indicate that they are destructive as they change the controller params object and may raise an exception.
REST conventions take the guesswork out of designing and consuming web APIs. Simply `GET`, `POST`, `PATCH`, or `DELETE` resource endpoints, and you get what you'd expect.
It has all the features of the sinatra-param gem, I used bang methods (like param!) to indicate that they are destructive as they change the controller params object and may raise an exception.
However, when it comes to figuring out what parameters are expected... well, all bets are off.
## Installation
This Rails extension takes a first step to solving this problem on the developer side.
As usual, in your Gemfile...
**`rails-param` allows you to declare, validate, and transform endpoint parameters as you would in frameworks like [ActiveModel](http://rubydoc.info/gems/activemodel/3.2.3/frames) or [DataMapper](http://datamapper.org/).**
