Method: Jason::Persistence::ClassMethods#attribute

Defined in:
lib/jason/persistence.rb

#attribute(*args) ⇒ Object

PUBLIC Add attribute to persistence layer for this model.

Defines getter and setter methods for given attribute

The Setter methods converts the attribute into the given data type.

args - List of arguments:

* first argument   - attribute name as symbol
* second argument  - data type of attribute

Currently three data types are supported:

  • String

  • Integer

  • Date



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# File 'lib/jason/persistence.rb', line 87

def attribute(*args)
  attribute_name,attribute_type = args[0], args[1]

  unless DATA_TYPES.keys.include?("#{attribute_type}".to_sym)
    raise Errors::NotSupportedDataTypeError.new("This Kind of type is not supported or missing!") 
  end

  cast_to = DATA_TYPES["#{attribute_type}".to_sym]#eval "Jason::#{attribute_type}"

  define_method attribute_name do 
    instance_variable_get("@#{attribute_name}")
  end

  define_method "#{attribute_name}=" do |attribute|
    instance_variable_set("@#{attribute_name}", attribute.send(cast_to))
  end

  defined_attributes << {:name => attribute_name, :type => attribute_type} unless defined_attributes.include?(attribute_name)

  unless defined_attributes_include?(:id)
    define_method :id do 
      instance_variable_get("@id")
    end

    define_method "id=" do |val|
      instance_variable_set("@id", val)
    end
    defined_attributes << {:name => :id, :type => String}
  end
end