Module: ModelAttribute

Defined in:
lib/model_attribute.rb,
lib/model_attribute/json.rb,
lib/model_attribute/errors.rb,
lib/model_attribute/version.rb

Defined Under Namespace

Modules: InstanceMethods, Json Classes: InvalidAttributeNameError, UnsupportedTypeError

Constant Summary collapse

SUPPORTED_TYPES = 
[:integer, :boolean, :string, :time, :json]
VERSION = 
"2.0.0"

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.extended(base) ⇒ Object 



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# File 'lib/model_attribute.rb', line 9

def self.extended(base)
  base.send(:include, InstanceMethods)
  base.instance_variable_set('@attribute_names', [])
  base.instance_variable_set('@attribute_types', {})
end

Instance Method Details

#attribute(name, type) ⇒ Object

Raises:



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# File 'lib/model_attribute.rb', line 15

def attribute(name, type)
  name = name.to_sym
  type = type.to_sym
  raise UnsupportedTypeError.new(type) unless SUPPORTED_TYPES.include?(type)

  @attribute_names << name
  @attribute_types[name] = type

  self.class_eval(<<-CODE, __FILE__, __LINE__ + 1)
    def #{name}=(value)
      write_attribute(#{name.inspect}, value, #{type.inspect})
    end

    def #{name}
      read_attribute(#{name.inspect})
    end

    def #{name}_changed?
      !!changes[#{name.inspect}]
    end
  CODE

  if type == :boolean
    self.class_eval(<<-CODE, __FILE__, __LINE__ + 1)
      def #{name}?
        !!read_attribute(#{name.inspect})
      end
    CODE
  end
end

#attributes ⇒ Object 



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# File 'lib/model_attribute.rb', line 46

def attributes
  @attribute_names
end