Class: Merb::AbstractController

Inherits:
Object
  • Object
show all
Defined in:
lib/merb-action-args/abstract_controller.rb

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Class Attribute Details

.action_argument_list ⇒ Object

Returns the value of attribute action_argument_list.



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# File 'lib/merb-action-args/abstract_controller.rb', line 4

def action_argument_list
  @action_argument_list
end

Class Method Details

.inherited(klass) ⇒ Object

Stores the argument lists for all methods for this class.

Parameters

klass<Class>

The controller that is being inherited from Merb::AbstractController.



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# File 'lib/merb-action-args/abstract_controller.rb', line 12

def inherited(klass)
  klass.action_argument_list = Hash.new do |h,k|
    args = klass.instance_method(k).get_args
    arguments = args[0]
    defaults = []
    arguments.each {|a| defaults << a[0] if a.size == 2} if arguments
    h[k] = [arguments || [], defaults]
  end
  old_inherited(klass)
end

.old_inherited ⇒ Object 



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# File 'lib/merb-action-args/abstract_controller.rb', line 5

alias_method :old_inherited, :inherited

Instance Method Details

#_call_action(action) ⇒ Object

Calls an action and maps the params hash to the action parameters.

Parameters

action<Symbol>

The action to call

Raises

BadRequest

The params hash doesn’t have a required parameter.



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# File 'lib/merb-action-args/abstract_controller.rb', line 31

def _call_action(action)
  arguments, defaults = self.class.action_argument_list[action]
  
  args = arguments.map do |arg, default|
    p = params.key?(arg.to_sym)
    unless p || (defaults && defaults.include?(arg))
      missing = arguments.reject {|arg| params.key?(arg[0].to_sym || arg[1])}
      raise BadRequest, "Your parameters (#{params.inspect}) were missing #{missing.join(", ")}"
    end
    p ? params[arg.to_sym] : default
  end
  __send__(action, *args)
end