Module: Fathom::AttributeSystem::ClassMethods

Defined in:
lib/fathom/behaviors/attribute_system.rb

Instance Method Summary collapse

Instance Method Details

#attribute(getter_name, default = nil) ⇒ Object

Define an attribute, or property of this class. Useful for very thin, generic Ruby classes for Data models.



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# File 'lib/fathom/behaviors/attribute_system.rb', line 40

def attribute(getter_name, default=nil)
  
  # Define a getter on the object
  define_method(getter_name) do
    
    target = send(self.class.attributes_proxy)

    return target[getter_name] unless target.respond_to?(:has_key?)

    if target.has_key?(getter_name)
      target[getter_name]
    else
      self.class.attribute_defaults[getter_name]
    end
  end

  # Define a setter on the object
  define_method("#{getter_name}=") do |value|
    send(self.class.attributes_proxy)[getter_name] = value
  end
  
  # Define a default on the object
  attribute_defaults[getter_name] = default
  
end

#attribute_defaults ⇒ Object 



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# File 'lib/fathom/behaviors/attribute_system.rb', line 75

def attribute_defaults
  @attribute_defaults ||= {}
end

#attributes_proxy ⇒ Object 



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# File 'lib/fathom/behaviors/attribute_system.rb', line 71

def attributes_proxy
  @attributes_proxy ||= :attributes
end

#set_attributes_proxy(value) ⇒ Object

Defines where the attributes are stored for the target class.



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# File 'lib/fathom/behaviors/attribute_system.rb', line 67

def set_attributes_proxy(value)
  @attributes_proxy = value
end