Class: SampleModels::ValidatesPresenceOfAttributeSequence

Inherits:
AttributeSequence show all
Defined in:
lib/sample_models/attribute_sequence.rb

Instance Method Summary collapse

Methods inherited from AttributeSequence

#belongs_to_association, build, #initialize, #next

Constructor Details

This class inherits a constructor from SampleModels::AttributeSequence

Instance Method Details

#belongs_to_value ⇒ Object 



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# File 'lib/sample_models/attribute_sequence.rb', line 129

def belongs_to_value
  @previous_belongs_to_instances ||= {}
  if @previous_belongs_to_instances[@number]
    value = @previous_belongs_to_instances[@number]
    begin
      value.reload
      value.id
    rescue ActiveRecord::RecordNotFound
      set_belongs_to_instance
      @previous_belongs_to_instances[@number].id
    end
  else
    set_belongs_to_instance
    @previous_belongs_to_instances[@number].id
  end
end

#existing_instance_not_previously_returned ⇒ Object 



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# File 'lib/sample_models/attribute_sequence.rb', line 146

def existing_instance_not_previously_returned
  previous_ids = @previous_belongs_to_instances.values.map(&:id)
  instance = nil
  if previous_ids.empty?
    belongs_to_association.klass.last
  else
    belongs_to_association.klass.last(
      :conditions => ["id not in (?)", previous_ids]
    )
  end
end

#set_belongs_to_instance ⇒ Object 



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# File 'lib/sample_models/attribute_sequence.rb', line 158

def set_belongs_to_instance
  instance = existing_instance_not_previously_returned
  instance ||= belongs_to_association.klass.sample
  @previous_belongs_to_instances[@number] = instance
end

#value ⇒ Object 



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# File 'lib/sample_models/attribute_sequence.rb', line 164

def value
  belongs_to_association ? belongs_to_value : super
end