Module: Amountable::ClassMethods

Defined in:
lib/amountable.rb

Instance Method Summary collapse

Instance Method Details

#act_as_amountable(options = {}) ⇒ Object

Possible storage values: [:table, :jsonb]



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# File 'lib/amountable.rb', line 58

def act_as_amountable(options = {})
  class_attribute :amount_names
  class_attribute :amount_sets
  class_attribute :amounts_column_name
  self.amount_sets = Hash.new { |h, k| h[k] = Set.new }
  self.amount_names = Set.new
  self.amounts_column_name = 'amounts'
  case (options[:storage] || :table).to_sym
  when :table
    has_many :amounts, class_name: 'Amountable::Amount', as: :amountable, dependent: :destroy, autosave: false
    include Amountable::TableMethods
  when :jsonb
    self.amounts_column_name = options[:column].to_s if options[:column]
    raise MissingColumn.new("You need an amounts jsonb field on the #{self.table_name} table.") unless column_names.include?(self.amounts_column_name)
    include Amountable::JsonbMethods
  else
    raise ArgumentError.new("Please specify a storage: #{ALLOWED_STORAGE}")
  end
  validate :validate_amount_names
  include Amountable::InstanceMethods
end

#allowed_amount_name?(name) ⇒ Boolean 



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# File 'lib/amountable.rb', line 104

def allowed_amount_name?(name)
  self.amount_names.include?(name.to_sym)
end

#amount(name, options = {}) ⇒ Object 



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# File 'lib/amountable.rb', line 88

def amount(name, options = {})
  (self.amount_names ||= Set.new) << name

  define_method name do
    (find_amount(name) || Amountable::NilAmount.new).value
  end

  define_method "#{name}=" do |value|
    set_amount(name, value)
  end

  Array(options[:summable] || options[:summables] || options[:set] || options[:sets] || options[:amount_set] || options[:amount_sets]).each do |set|
    amount_set(set, name)
  end
end

#amount_set(set_name, component) ⇒ Object 



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# File 'lib/amountable.rb', line 80

def amount_set(set_name, component)
  self.amount_sets[set_name.to_sym] << component.to_sym

  define_method set_name do
    get_set(set_name)
  end
end