Module: Formidable::Coercions

Included in:
Elements::Element
Defined in:
lib/formidable/coercions.rb

Constant Summary collapse

MissingCoercion = 
Class.new(StandardError)
IncompatibleInterface = 
Class.new(StandardError)

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.coercions ⇒ Object 



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# File 'lib/formidable/coercions.rb', line 8

def self.coercions
  @coercions ||= Hash.new do |hash, key|
    raise MissingCoercion, "No coercion defined for #{key}"
  end
end

.included(klass) ⇒ Object 



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# File 'lib/formidable/coercions.rb', line 18

def self.included(klass)
  if ! klass.method_defined?(:raw_data) || ! klass.method_defined?(:cleaned_data=)
    raise IncompatibleInterface, "You are supposed to define #{klass}#raw_data and #{klass}#cleaned_data= in order to get coercions running!"
  end
end

Instance Method Details

#cleaned_data ⇒ Object 



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# File 'lib/formidable/coercions.rb', line 24

def cleaned_data
  @cleaned_data ||= self.coerce!
end

#coerce(type = nil, &block) ⇒ Object 



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# File 'lib/formidable/coercions.rb', line 32

def coerce(type = nil, &block)
  if type && block.nil?
    coercions << Coercions.coercions[type]
  elsif type.nil? && block
    coercions << block
  else
    raise ArgumentError, "provide block or type"
  end
end

#coerce! ⇒ Object 



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# File 'lib/formidable/coercions.rb', line 42

def coerce!
  self.cleaned_data = begin
    coercions.inject(self.raw_data) do |coercion, raw_data|
      coercion.call(raw_data)
    end
  end
end

#coercions ⇒ Object 



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# File 'lib/formidable/coercions.rb', line 28

def coercions
  @coercions ||= Array.new
end