Class: Dynamoid::Transactions::Mutation::Destroy

Inherits:
Base
  • Object
show all
Defined in:
lib/dynamoid/transactions/mutation/destroy.rb

Instance Method Summary collapse

Methods inherited from Base

validate_attribute_names!

Constructor Details

#initialize(model, **options) ⇒ Destroy

Returns a new instance of Destroy.



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# File 'lib/dynamoid/transactions/mutation/destroy.rb', line 11

def initialize(model, **options)
  super()

  @model = model
  @options = options
  @model_class = model.class
  @aborted = false
end

Instance Method Details

#aborted? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dynamoid/transactions/mutation/destroy.rb', line 45

def aborted?
  @aborted
end

#action_requests ⇒ Object 



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# File 'lib/dynamoid/transactions/mutation/destroy.rb', line 59

def action_requests
  builder = Builders::DeleteRequestBuilder.new(@model_class)
  builder.hash_key = dump_attribute(@model_class.hash_key, @model.hash_key)
  builder.range_key = dump_attribute(@model_class.range_key, @model.range_value) if @model_class.range_key?

  if @model_class.attributes[:lock_version]
    lock_version = if @model.changes[:lock_version].nil?
                     @model.lock_version
                   else
                     @model.changes[:lock_version][0]
                   end

    # skip concurrency control when lock_version is nil
    if lock_version
      builder.add_expression_attribute_name('#_lock_version', 'lock_version')
      builder.add_expression_attribute_value(':lock_version_value', lock_version)
      builder.condition_expression = '#_lock_version = :lock_version_value'
    end
  end

  [builder.request]
end

#observable_by_user_result ⇒ Object 



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# File 'lib/dynamoid/transactions/mutation/destroy.rb', line 53

def observable_by_user_result
  return false if @aborted

  @model
end

#on_commit ⇒ Object 



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# File 'lib/dynamoid/transactions/mutation/destroy.rb', line 34

def on_commit
  return if @aborted

  @model.destroyed = true
  @model.run_callbacks(:commit)
end

#on_registration ⇒ Object 



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# File 'lib/dynamoid/transactions/mutation/destroy.rb', line 20

def on_registration
  @aborted = true
  @model.run_callbacks(:destroy) do
    validate_primary_key!

    @aborted = false
    true
  end

  if @aborted && @options[:raise_error]
    raise Dynamoid::Errors::RecordNotDestroyed, @model
  end
end

#on_rollback ⇒ Object 



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# File 'lib/dynamoid/transactions/mutation/destroy.rb', line 41

def on_rollback
  @model.run_callbacks(:rollback)
end

#skipped? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dynamoid/transactions/mutation/destroy.rb', line 49

def skipped?
  false
end