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Class: ActiveRecord::ConnectionAdapters::Transaction

Do not use. This class is for internal use only.
Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
RealTransaction, RestartParentTransaction, SavepointTransaction
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::ActiveRecord::Transaction
Instance Chain:
self, ::ActiveRecord::Transaction
Inherits: ActiveRecord::Transaction
Defined in: activerecord/lib/active_record/connection_adapters/abstract/transaction.rb

Class Method Summary

::ActiveRecord::Transaction - Inherited

.new

Instance Attribute Summary

Instance Method Summary

::ActiveRecord::Transaction - Inherited

#after_commit

Registers a block to be called after the current transaction is fully committed.
#after_rollback

Registers a block to be called after the current transaction is rolled back.
#before_commit

Registers a block to be called before the current transaction is fully committed.
#append_callbacks

Constructor Details

.new(connection, isolation: nil, joinable: true, run_commit_callbacks: false) ⇒ Transaction

[ GitHub ] 

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 130



def initialize(connection, isolation: nil, joinable: true, run_commit_callbacks: false)
  super()
  @connection = connection
  @state = TransactionState.new
  @records = nil
  @isolation_level = isolation
  @materialized = false
  @joinable = joinable
  @run_commit_callbacks = run_commit_callbacks
  @lazy_enrollment_records = nil
  @dirty = false
  @instrumenter = TransactionInstrumenter.new(connection: connection)
end


  







Instance Attribute Details



  

    #closed?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 272



def closed?; false; end


  








  

    #connection   (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 125



attr_reader :connection, :state, :savepoint_name, :isolation_level


  








  

    #dirty?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 148



def dirty?
  @dirty
end


  








  

    #full_rollback?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 270



def full_rollback?; true; end


  








  

    #isolation_level   (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 125



attr_reader :connection, :state, :savepoint_name, :isolation_level


  








  

    #joinable?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 271



def joinable?; @joinable; end


  








  

    #materialized?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 185



def materialized?
  @materialized
end


  








  

    #open?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 273



def open?; !closed?; end


  








  

    #restartable?  ⇒ Boolean  (readonly)
  



  

    

Can this transaction’s current state be recreated by rollback+begin ?


  





  


  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 172



def restartable?
  joinable? && !dirty?
end


  








  

    #savepoint_name   (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 125



attr_reader :connection, :state, :savepoint_name, :isolation_level


  








  

    #state   (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 125



attr_reader :connection, :state, :savepoint_name, :isolation_level


  








  

    #written   (rw)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 126



attr_accessor :written


  







Instance Method Details



  

    #add_record(record, ensure_finalize = true)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 152



def add_record(record, ensure_finalize = true)
  @records ||= []
  if ensure_finalize
    @records << record
  else
    @lazy_enrollment_records ||= ObjectSpace::WeakMap.new
    @lazy_enrollment_records[record] = record
  end
end


  








  

    #before_commit_records  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 217



def before_commit_records
  if @run_commit_callbacks
    if records
      if ActiveRecord.before_committed_on_all_records
        ite = unique_records

        instances_to_run_callbacks_on = records.each_with_object({}) do |record, candidates|
          candidates[record] = record
        end

        run_action_on_records(ite, instances_to_run_callbacks_on) do |record, should_run_callbacks|
          record.before_committed! if should_run_callbacks
        end
      else
        records.uniq.each(&:before_committed!)
      end
    end

    @callbacks&.each(&:before_commit)
  end
  # Note: When @run_commit_callbacks is false #commit_records takes care of appending
  # remaining callbacks to the parent transaction
end


  








  

    #commit_records  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 241



def commit_records
  if records
    begin
      ite = unique_records

      if @run_commit_callbacks
        instances_to_run_callbacks_on = prepare_instances_to_run_callbacks_on(ite)

        run_action_on_records(ite, instances_to_run_callbacks_on) do |record, should_run_callbacks|
          record.committed!(should_run_callbacks: should_run_callbacks)
        end
      else
        while record = ite.shift
          # if not running callbacks, only adds the record to the parent transaction
          connection.add_transaction_record(record)
        end
      end
    ensure
      ite&.each { |i| i.committed!(should_run_callbacks: false) }
    end
  end

  if @run_commit_callbacks
    @callbacks&.each(&:after_commit)
  elsif @callbacks
    connection.current_transaction.append_callbacks(@callbacks)
  end
end


  








  

    #dirty!  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 144



def dirty!
  @dirty = true
end


  








  

    #incomplete!  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 176



def incomplete!
  @instrumenter.finish(:incomplete) if materialized?
end


  








  

    #invalidate!  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 128



delegate :invalidate!, :invalidated?, to: :@state


  








  

    #invalidated?  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 128



delegate :invalidate!, :invalidated?, to: :@state


  








  

    #materialize!  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 180



def materialize!
  @materialized = true
  @instrumenter.start
end


  








  

    #prepare_instances_to_run_callbacks_on(records)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 288



def prepare_instances_to_run_callbacks_on(records)
  records.each_with_object({}) do |record, candidates|
    next unless record.trigger_transactional_callbacks?

    earlier_saved_candidate = candidates[record]

    next if earlier_saved_candidate && record.class.run_commit_callbacks_on_first_saved_instances_in_transaction

    # If the candidate instance destroyed itself in the database, then
    # instances which were added to the transaction afterwards, and which
    # think they updated themselves, are wrong. They should not replace
    # our candidate as an instance to run callbacks on
    next if earlier_saved_candidate&.destroyed? && !record.destroyed?

    # If the candidate instance was created inside of this transaction,
    # then instances which were subsequently loaded from the database
    # and updated need that state transferred to them so that
    # the after_create_commit callbacks are run
    record._new_record_before_last_commit = true if earlier_saved_candidate&._new_record_before_last_commit

    # The last instance to save itself is likeliest to have internal
    # state that matches what's committed to the database
    candidates[record] = record
  end
end


  








  

    #records  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 162



def records
  if @lazy_enrollment_records
    @records.concat @lazy_enrollment_records.values
    @lazy_enrollment_records = nil
  end
  @records
end


  








  

    #restore!  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 189



def restore!
  if materialized?
    incomplete!
    @materialized = false
    materialize!
  end
end


  








  

    #rollback_records  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 197



def rollback_records
  if records
    begin
      ite = unique_records

      instances_to_run_callbacks_on = prepare_instances_to_run_callbacks_on(ite)

      run_action_on_records(ite, instances_to_run_callbacks_on) do |record, should_run_callbacks|
        record.rolledback!(force_restore_state: full_rollback?, should_run_callbacks: should_run_callbacks)
      end
    ensure
      ite&.each do |i|
        i.rolledback!(force_restore_state: full_rollback?, should_run_callbacks: false)
      end
    end
  end

  @callbacks&.each(&:after_rollback)
end


  








  

    #run_action_on_records(records, instances_to_run_callbacks_on)   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 280



def run_action_on_records(records, instances_to_run_callbacks_on)
  while record = records.shift
    should_run_callbacks = record.__id__ == instances_to_run_callbacks_on[record].__id__

    yield record, should_run_callbacks
  end
end


  








  

    #unique_records   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/transaction.rb', line 276



def unique_records
  records.uniq(&:__id__)
end