Module: ActiveRecord::Locking::Fatalistic

Defined in:
lib/active_record/locking/fatalistic.rb

Instance Method Summary collapse

Instance Method Details

#lock(lock_statement = nil, &block) ⇒ Object

Performs a table-level lock. If this method is invoked with a block, then a new transaction is begun, and the table is locked inside the transaction. If invoked without a block, then it simple emits the appropriate LOCK TABLE statement.



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# File 'lib/active_record/locking/fatalistic.rb', line 11

def lock(lock_statement = nil, &block)
  locker = ::Fatalistic::Locker.for(self)
  if block_given?
    transaction do
      begin
        locker.lock(lock_statement)
        yield
      ensure
        locker.unlock
      end
    end
  else
    locker.lock(lock_statement)
  end
end

#unlock ⇒ Object

Unlock the table. This is only needed by MySQL. If you called lock with a block, then this is invoked for you automatically.



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# File 'lib/active_record/locking/fatalistic.rb', line 29

def unlock
  ::Fatalistic::Locker.for(self).unlock
end