merb-action-args

A plugin for the Merb framework that provides support for arguments to actions that come in from the query.

Basics

class Foo < Merb::Controller

def bar(baz)
  bar
end

end ]}

Hitting “/foo/bar?baz=bat” will call foo(“bat”).

Hitting “/foo/bar” will raise a BadRequest (Status 400) error.

Defaults

class Foo < Merb::Controller

def bar(baz, bat = "hola")
  "#{baz #bat"
end

end ]}}

Hitting “/foo/bar?baz=bat” will call foo(“bat”, “hola”)

Hitting “/foo/bar?baz=bat&bat=whaa” will call foo(“bat”, “whaa”)

Hitting “/foo/bar” will still raise a BadRequest.

Out of order defaults

{{[ class Foo < Merb::Controller

def bar(one, two = "dos", three = "tres")
  "#{one} #{two} #{three}"
end

end ]}}

The interesting thing here is that hitting “/foo/bar?one=uno&three=three” will call foo(“uno”, “dos”, “three”). In other words, the defaults can be in any order, and merb-action-args will figure out where to fill in the holes.