Module: SequencescapeExcel::List::ClassMethods

Defined in:
app/sequencescape_excel/sequencescape_excel/list.rb

Overview

ClassMethods

Instance Method Summary collapse

Instance Method Details

#list_for(*args) ⇒ Object

Set up the list It will:

  • create a list of keys

  • create a struct class based on the name

  • creates a method which returns a list of keys for the items in each key


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# File 'app/sequencescape_excel/sequencescape_excel/list.rb', line 63

def list_for(*args)
  options = args.extract_options!

  model = args.first.to_s.classify

  list_model = "#{model}Items"

  define_method :keys do
    @keys ||= options[:keys]
  end

  options[:keys].each do |key|
    define_method key.to_s.pluralize do
      items.fetch(key).keys
    end
  end

  alias_method args.first, :values

  return if const_defined?(list_model)

  list_model_const = Object.const_set(list_model, Struct.new(*options[:keys]) do
    def fetch(key)
      if members.include?(key)
        self[key]
      else
        {}
      end
    end
  end)

  define_method :list_model do
    list_model_const
  end
end