Module: AttrExtras::ClassMethods

Included in:
Class
Defined in:
lib/attr_extras.rb

Instance Method Summary collapse

Instance Method Details

#attr_id_query(*names) ⇒ Object 



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# File 'lib/attr_extras.rb', line 75

def attr_id_query(*names)
  attr_query_with_suffix(*names, "_id")
end

#attr_initialize(*names) ⇒ Object 



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# File 'lib/attr_extras.rb', line 5

def attr_initialize(*names)
  min_arity = names.count { |n| not n.is_a?(Array) }
  max_arity = names.length

  define_method(:initialize) do |*values|
    provided_arity = values.length

    unless (min_arity..max_arity).include?(provided_arity)
      arity_range = [min_arity, max_arity].uniq.join("..")
      raise ArgumentError, "wrong number of arguments (#{provided_arity} for #{arity_range})"
    end

    names.zip(values).each do |name_or_names, value|
      if name_or_names.is_a?(Array)
        value ||= {}

        name_or_names.each do |name|
          if name.to_s.end_with?("!")
            actual_name = name.to_s.chop.to_sym
            actual_value = value.fetch(actual_name)
          else
            actual_name = name
            actual_value = value[name]
          end

          instance_variable_set("@#{actual_name}", actual_value)
        end
      else
        name = name_or_names
        instance_variable_set("@#{name}", value)
      end
    end
  end
end

#attr_private(*names) ⇒ Object 



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# File 'lib/attr_extras.rb', line 40

def attr_private(*names)
  attr_reader(*names)
  private(*names)
end

#attr_query(*names) ⇒ Object 



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# File 'lib/attr_extras.rb', line 71

def attr_query(*names)
  attr_query_with_suffix(*names, "")
end

#attr_value(*names) ⇒ Object 



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# File 'lib/attr_extras.rb', line 50

def attr_value(*names)
  attr_initialize(*names)

  flat_names = attr_flat_names(names)
  attr_reader *flat_names

  define_method(:==) do |other|
    return false unless other.is_a?(self.class)

    flat_names.all? { |attr| self.public_send(attr) == other.public_send(attr) }
  end
end

#method_object(method_name, *names) ⇒ Object 



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# File 'lib/attr_extras.rb', line 63

def method_object(method_name, *names)
  singleton_class.send(:define_method, method_name) do |*values|
    new(*values).send(method_name)
  end

  pattr_initialize(*names)
end

#pattr_initialize(*names) ⇒ Object 



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# File 'lib/attr_extras.rb', line 45

def pattr_initialize(*names)
  attr_initialize(*names)
  attr_private *attr_flat_names(names)
end