Class: Dynamoid::Persistence::Save

Inherits:
Object
  • Object
show all
Defined in:
lib/dynamoid/persistence/save.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model, touch: nil) ⇒ Save

Returns a new instance of Save.



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# File 'lib/dynamoid/persistence/save.rb', line 11

def initialize(model, touch: nil)
  @model = model
  @touch = touch # touch=false means explicit disabling of updating the `updated_at` attribute
end

Class Method Details

.call(model, **options) ⇒ Object 



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# File 'lib/dynamoid/persistence/save.rb', line 7

def self.call(model, **options)
  new(model, **options).call
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/dynamoid/persistence/save.rb', line 16

def call
  @model.hash_key = SecureRandom.uuid if @model.hash_key.blank?

  return true unless @model.changed?

  @model.created_at ||= DateTime.now.in_time_zone(Time.zone) if @model.class.timestamps_enabled?

  if @model.class.timestamps_enabled? && !@model.updated_at_changed? && !(@touch == false && @model.persisted?)
    @model.updated_at = DateTime.now.in_time_zone(Time.zone)
  end

  # Add an optimistic locking check if the lock_version column exists
  if @model.class.attributes[:lock_version]
    @model.lock_version = (@model.lock_version || 0) + 1
  end

  if @model.new_record?
    attributes_dumped = Dumping.dump_attributes(@model.attributes, @model.class.attributes)
    Dynamoid.adapter.write(@model.class.table_name, attributes_dumped, conditions_for_write)
  else
    attributes_to_persist = @model.attributes.slice(*@model.changed.map(&:to_sym))

    Dynamoid.adapter.update_item(@model.class.table_name, @model.hash_key, options_to_update_item) do |t|
      attributes_to_persist.each do |name, value|
        value_dumped = Dumping.dump_field(value, @model.class.attributes[name])
        t.set(name => value_dumped)
      end
    end
  end

  @model.new_record = false
  true
rescue Dynamoid::Errors::ConditionalCheckFailedException => e
  if @model.new_record?
    raise Dynamoid::Errors::RecordNotUnique.new(e, @model)
  else
    raise Dynamoid::Errors::StaleObjectError.new(@model, 'persist')
  end
end