Method: PEROBS::Object#attr_init

Defined in:
lib/perobs/Object.rb

#attr_init(attr, val = nil, &block) ⇒ Object

Use this method to initialize persistent attributes in the restore() method that have not yet been initialized. This is the case when the object was saved with an earlier version of the program that did not yet have the instance variable. If you want to assign another PEROBS object to the variable you should use the block variant to avoid unnecessary creation of PEROBS object that later need to be collected again.



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# File 'lib/perobs/Object.rb', line 111

def attr_init(attr, val = nil, &block)
  if _all_attributes.include?(attr)
    unless instance_variable_defined?('@' + attr.to_s)
      _set(attr, block_given? ? yield : val)
    end
    return true
  else
    raise ArgumentError, "'#{attr}' is not a defined persistent " +
                         "attribute of class #{self.class}"
  end

  false
end