Module: Flatter::Mapper::Collection::Concern::ClassMethods

Defined in:
lib/flatter/mapper/collection.rb

Instance Method Summary collapse

Instance Method Details

#key(arg = nil) ⇒ Object 



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# File 'lib/flatter/mapper/collection.rb', line 35

def key(arg = nil)
  args    = []
  options = {writer: false}

  case arg
  when String, Symbol
    options[:key] = arg.to_sym
  when Proc
    args << :key
    options[:reader] = arg
  else
    fail ArgumentError, "Cannot use '#{arg}' as collection key"
  end

  map *args, **options
end