Module: Persistence::Object::Complex::ClassAndObjectInstance

Includes:
CascadingConfiguration::Hash
Included in:
ClassInstance, ObjectInstance
Defined in:
lib/persistence/object/complex/class_and_object_instance.rb

Overview

Methods applied to both Class and Object instances of complex objects enabled with persistence capabilities.

Instance Method Summary collapse

Instance Method Details

#attr_delete_cascades(attribute_name, ...) ⇒ Object

Declare that deleting object should also delete attribute(s).

Parameters:

  • attribute_name —

    Attribute(s) in question.

Returns:

  • self


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# File 'lib/persistence/object/complex/class_and_object_instance.rb', line 32

def attr_delete_cascades( *attributes )
  
  attributes.each do |this_attribute|
    delete_cascades[ this_attribute.accessor_name ] = true
  end
  
  return self
  
end

#attr_delete_cascades! ⇒ Object

Declare that deleting object should also delete declared attributes.

Returns:

  • self


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# File 'lib/persistence/object/complex/class_and_object_instance.rb', line 74

def attr_delete_cascades!

  return attr_delete_cascades( *persistent_attributes.keys )

end

#attr_delete_cascades(attribute_name, ...) ⇒ Object

Declare that deleting object should not delete attribute(s).

Parameters:

  • attribute_name —

    Attribute(s) in question.

Returns:

  • self


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# File 'lib/persistence/object/complex/class_and_object_instance.rb', line 55

def attr_delete_does_not_cascade( *attributes )
  
  attributes.each do |this_attribute|
    delete_cascades[ this_attribute.accessor_name ] = false
  end
  
  return self
  
end

#attr_delete_does_not_cascade! ⇒ Object

Declare that deleting object should not delete declared attributes.

Returns:

  • self


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# File 'lib/persistence/object/complex/class_and_object_instance.rb', line 90

def attr_delete_does_not_cascade!

  return attr_delete_does_not_cascade( *persistent_attributes.keys )

end

#delete_cascades ⇒ CompositingHash{Symbol,String=>true,false}

Returns Hash containing cascading delete data for attributes.

Returns:

  • (CompositingHash{Symbol,String=>true,false}) —

    Hash containing cascading delete data for attributes.


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# File 'lib/persistence/object/complex/class_and_object_instance.rb', line 21

attr_configuration_hash :delete_cascades

#delete_cascades?(attribute_name) ⇒ true, false

Query whether deleting object will also delete attribute

Parameters:

  • attribute_name —

    Attribute in question.

Returns:

  • (true, false) —

    Whether deleting object will cascade to delete object at attribute.


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# File 'lib/persistence/object/complex/class_and_object_instance.rb', line 107

def delete_cascades?( attribute_name )

  should_cascade = false

  accessor_name = attribute_name.accessor_name

  # delete_cascades is a cascading array that automatically handles inheritance
  if ( should_cascade = delete_cascades[ accessor_name ] ) == nil

    if attribute_value = persistence_port.get_attribute( self, accessor_name ) and
       attribute_value.is_a?( ::Persistence::Object::Complex::ComplexObject )

      should_cascade = attribute_value.delete_cascades?

    end

    should_cascade = true if should_cascade.nil?
    delete_cascades[ accessor_name ] = should_cascade

  end

  return should_cascade

end