module Keymap::ConnectionAdapters::TransactionManagement

Public Instance Methods

outside_transaction?() click to toggle source

Checks whether there is currently no transaction active. This is done by querying the database driver, and does not use the transaction house-keeping information recorded by increment_open_transactions and friends.

Returns true if there is no transaction active, false if there is a transaction active, and nil if this information is unknown.

Not all adapters supports transaction state introspection.

# File lib/keymap/connection_adapters/abstract/transaction_management.rb, line 17
def outside_transaction?
  nil
end

transaction(options = {}) { || ... } click to toggle source

Runs the given block in a database transaction, and returns the result of the block.

# File lib/keymap/connection_adapters/abstract/transaction_management.rb, line 23
def transaction(options = {})
  transaction_open = false
  @_current_transaction_records ||= []
  begin
    if block_given?
      begin_db_transaction
      transaction_open = true
      @_current_transaction_records.push([])
      yield
    end
  rescue Exception => database_transaction_rollback
    if transaction_open && !outside_transaction?
      transaction_open = false
      rollback_db_transaction
    end
    raise unless database_transaction_rollback.is_a?(Rollback)
  end
ensure
  if transaction_open
    begin
      commit_db_transaction
    rescue Exception => database_transaction_rollback
      rollback_db_transaction
      raise
    end
  end
end