ParamsParser is a simple gem to help - you guessed it - parse parameter hashes.

ParamsParser currently supports:

• defaults
• transformations
• mapping input keys to output keys

Add this line to your application's Gemfile:

gem 'params_parser'

And then execute:

$ bundle

Or install it yourself as:

$ gem install params_parser

Create a parser with a configuration hash:

parser = ParamsParser::Parser.new({
  id: { transform: Model.public_method(:find), map_to: :model }
  page: { default: 1, transform: :to_i.to_proc }
})

Parse parameters:

parser.parse({        # {
  id: "1",            #   model: Model(...),
  page: "5"           #   page: 5
})                    # }

parser.parse({        # {
  id: "1",            #   model: Model(...),           
})                    #   page: 1
                      # }

1. Fork it ( http://github.com/gustly/params_parser/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request