Module: Omnis::Transformer::InstanceMethods

Defined in:
lib/omnis/transformer.rb

Instance Method Summary collapse

Instance Method Details

#columns ⇒ Object 



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# File 'lib/omnis/transformer.rb', line 68

def columns
  self.class.properties.keys
end

#property_value(property, source) ⇒ Object 



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# File 'lib/omnis/transformer.rb', line 72

def property_value(property, source)
  raw_value = property.extract(source)
  raw_value = property.default if property.default && (raw_value == Nothing || raw_value.nil?)
  applied_value = self.class.apply_to_value(raw_value)
  property.format ? property.format.call(applied_value) : applied_value
end

#to_proc ⇒ Object

provides a Proc to the transform method, for use e.g. with Mongo documents If you want to cache a transformer for reuse, you can cache just this Proc



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# File 'lib/omnis/transformer.rb', line 86

def to_proc
  method(:transform).to_proc
end

#transform(source) ⇒ Object 



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# File 'lib/omnis/transformer.rb', line 79

def transform(source)
  result = Hash[self.class.properties.map do |k, v| [k, property_value(v, source)] end]
  respond_to?(:to_object) ? to_object(result) : result
end