diff options
Diffstat (limited to 'activerecord/lib/active_record/transactions.rb')
| -rw-r--r-- | activerecord/lib/active_record/transactions.rb | 105 |
1 files changed, 57 insertions, 48 deletions
diff --git a/activerecord/lib/active_record/transactions.rb b/activerecord/lib/active_record/transactions.rb index fe3842b905..5113e08e8e 100644 --- a/activerecord/lib/active_record/transactions.rb +++ b/activerecord/lib/active_record/transactions.rb @@ -164,12 +164,12 @@ module ActiveRecord # end # end # - # only "Kotori" is created. This works on MySQL and PostgreSQL. SQLite3 version >= '3.6.8' also supports it. + # only "Kotori" is created. # # Most databases don't support true nested transactions. At the time of # writing, the only database that we're aware of that supports true nested # transactions, is MS-SQL. Because of this, Active Record emulates nested - # transactions by using savepoints on MySQL and PostgreSQL. See + # transactions by using savepoints. See # https://dev.mysql.com/doc/refman/5.7/en/savepoint.html # for more information about savepoints. # @@ -234,6 +234,12 @@ module ActiveRecord set_callback(:commit, :after, *args, &block) end + # Shortcut for <tt>after_commit :hook, on: [ :create, :update ]</tt>. + def after_save_commit(*args, &block) + set_options_for_callbacks!(args, on: [ :create, :update ]) + set_callback(:commit, :after, *args, &block) + end + # Shortcut for <tt>after_commit :hook, on: :create</tt>. def after_create_commit(*args, &block) set_options_for_callbacks!(args, on: :create) @@ -276,7 +282,6 @@ module ActiveRecord end private - def set_options_for_callbacks!(args, enforced_options = {}) options = args.extract_options!.merge!(enforced_options) args << options @@ -327,7 +332,7 @@ module ActiveRecord # Ensure that it is not called if the object was never persisted (failed create), # but call it after the commit of a destroyed object. def committed!(should_run_callbacks: true) #:nodoc: - if should_run_callbacks && (destroyed? || persisted?) + if should_run_callbacks @_committed_already_called = true _run_commit_without_transaction_enrollment_callbacks _run_commit_callbacks @@ -349,18 +354,6 @@ module ActiveRecord clear_transaction_record_state end - # Add the record to the current transaction so that the #after_rollback and #after_commit callbacks - # can be called. - def add_to_transaction - if has_transactional_callbacks? - self.class.connection.add_transaction_record(self) - else - sync_with_transaction_state - set_transaction_state(self.class.connection.transaction_state) - end - remember_transaction_record_state - end - # Executes +method+ within a transaction and captures its return value as a # status flag. If the status is true the transaction is committed, otherwise # a ROLLBACK is issued. In any case the status flag is returned. @@ -370,29 +363,40 @@ module ActiveRecord def with_transaction_returning_status status = nil self.class.transaction do - add_to_transaction + if has_transactional_callbacks? + add_to_transaction + else + sync_with_transaction_state if @transaction_state&.finalized? + @transaction_state = self.class.connection.transaction_state + end + remember_transaction_record_state + status = yield raise ActiveRecord::Rollback unless status end status end + def trigger_transactional_callbacks? # :nodoc: + (@_new_record_before_last_commit || _trigger_update_callback) && persisted? || + _trigger_destroy_callback && destroyed? + end + private attr_reader :_committed_already_called, :_trigger_update_callback, :_trigger_destroy_callback # Save the new record state and id of a record so it can be restored later if a transaction fails. def remember_transaction_record_state - @_start_transaction_state.reverse_merge!( + @_start_transaction_state ||= { id: id, new_record: @new_record, destroyed: @destroyed, + attributes: @attributes, frozen?: frozen?, - ) - @_start_transaction_state[:level] = (@_start_transaction_state[:level] || 0) + 1 - remember_new_record_before_last_commit - end + level: 0 + } + @_start_transaction_state[:level] += 1 - def remember_new_record_before_last_commit if _committed_already_called @_new_record_before_last_commit = false else @@ -402,27 +406,32 @@ module ActiveRecord # Clear the new record state and id of a record. def clear_transaction_record_state - @_start_transaction_state[:level] = (@_start_transaction_state[:level] || 0) - 1 + return unless @_start_transaction_state + @_start_transaction_state[:level] -= 1 force_clear_transaction_record_state if @_start_transaction_state[:level] < 1 end # Force to clear the transaction record state. def force_clear_transaction_record_state - @_start_transaction_state.clear + @_start_transaction_state = nil + @transaction_state = nil end # Restore the new record state and id of a record that was previously saved by a call to save_record_state. - def restore_transaction_record_state(force = false) - unless @_start_transaction_state.empty? - transaction_level = (@_start_transaction_state[:level] || 0) - 1 - if transaction_level < 1 || force - restore_state = @_start_transaction_state - thaw + def restore_transaction_record_state(force_restore_state = false) + if restore_state = @_start_transaction_state + if force_restore_state || restore_state[:level] <= 1 @new_record = restore_state[:new_record] @destroyed = restore_state[:destroyed] - pk = self.class.primary_key - if pk && _read_attribute(pk) != restore_state[:id] - _write_attribute(pk, restore_state[:id]) + @attributes = restore_state[:attributes].map do |attr| + value = @attributes.fetch_value(attr.name) + attr = attr.with_value_from_user(value) if attr.value != value + attr + end + @mutations_from_database = nil + @mutations_before_last_save = nil + if @attributes.fetch_value(@primary_key) != restore_state[:id] + @attributes.write_from_user(@primary_key, restore_state[:id]) end freeze if restore_state[:frozen?] end @@ -443,8 +452,10 @@ module ActiveRecord end end - def set_transaction_state(state) - @transaction_state = state + # Add the record to the current transaction so that the #after_rollback and #after_commit + # callbacks can be called. + def add_to_transaction + self.class.connection.add_transaction_record(self) end def has_transactional_callbacks? @@ -464,19 +475,17 @@ module ActiveRecord # This method checks to see if the ActiveRecord object's state reflects # the TransactionState, and rolls back or commits the Active Record object # as appropriate. - # - # Since Active Record objects can be inside multiple transactions, this - # method recursively goes through the parent of the TransactionState and - # checks if the Active Record object reflects the state of the object. def sync_with_transaction_state - update_attributes_from_transaction_state(@transaction_state) - end - - def update_attributes_from_transaction_state(transaction_state) - if transaction_state && transaction_state.finalized? - restore_transaction_record_state(transaction_state.fully_rolledback?) if transaction_state.rolledback? - force_clear_transaction_record_state if transaction_state.fully_committed? - clear_transaction_record_state if transaction_state.fully_completed? + if transaction_state = @transaction_state + if transaction_state.fully_committed? + force_clear_transaction_record_state + elsif transaction_state.committed? + clear_transaction_record_state + elsif transaction_state.rolledback? + force_restore_state = transaction_state.fully_rolledback? + restore_transaction_record_state(force_restore_state) + clear_transaction_record_state + end end end end |