/**
* Attempts to revert a step of the given migration or one of its dependencies
*
* @param string $name The class name of the migration
* @return bool Whether any update step was successfully run
*/
protected function try_revert($name)
{
if (!class_exists($name)) {
return false;
}
$migration = $this->get_migration($name);
$state = $this->migration_state[$name];
$this->last_run_migration = array('name' => $name, 'class' => $migration, 'task' => '');
if ($state['migration_data_done']) {
if ($state['migration_data_state'] !== 'revert_data') {
$result = $this->process_data_step($migration->update_data(), $state['migration_data_state'], true);
$state['migration_data_state'] = $result === true ? 'revert_data' : $result;
} else {
$result = $this->process_data_step($migration->revert_data(), '', false);
$state['migration_data_state'] = $result === true ? '' : $result;
$state['migration_data_done'] = $result === true ? false : true;
}
$this->set_migration_state($name, $state);
} else {
if ($state['migration_schema_done']) {
$steps = $this->helper->get_schema_steps($migration->revert_schema());
$result = $this->process_data_step($steps, $state['migration_data_state']);
$state['migration_data_state'] = $result === true ? '' : $result;
$state['migration_schema_done'] = $result === true ? false : true;
if (!$state['migration_schema_done']) {
$sql = 'DELETE FROM ' . $this->migrations_table . "\n\t\t\t\t\tWHERE migration_name = '" . $this->db->sql_escape($name) . "'";
$this->db->sql_query($sql);
unset($this->migration_state[$name]);
}
}
}
return true;
}
/**
* Attempts to revert a step of the given migration or one of its dependencies
*
* @param string $name The class name of the migration
* @return bool Whether any update step was successfully run
*/
protected function try_revert($name)
{
if (!class_exists($name)) {
return false;
}
$migration = $this->get_migration($name);
$state = $this->migration_state[$name];
$this->last_run_migration = array('name' => $name, 'class' => $migration, 'task' => '');
if ($state['migration_data_done']) {
$verbosity = empty($state['migration_data_state']) ? migrator_output_handler_interface::VERBOSITY_VERBOSE : migrator_output_handler_interface::VERBOSITY_DEBUG;
$this->output_handler->write(array('MIGRATION_REVERT_DATA_RUNNING', $name), $verbosity);
$total_time = is_array($state['migration_data_state']) && isset($state['migration_data_state']['_total_time']) ? $state['migration_data_state']['_total_time'] : 0.0;
$elapsed_time = microtime(true);
$steps = array_merge($this->helper->reverse_update_data($migration->update_data()), $migration->revert_data());
$result = $this->process_data_step($steps, $state['migration_data_state']);
$elapsed_time = microtime(true) - $elapsed_time;
$total_time += $elapsed_time;
if (is_array($result)) {
$result['_total_time'] = $total_time;
}
$state['migration_data_state'] = $result === true ? '' : $result;
$state['migration_data_done'] = $result === true ? false : true;
$this->set_migration_state($name, $state);
if (!$state['migration_data_done']) {
$this->output_handler->write(array('MIGRATION_REVERT_DATA_DONE', $name, $total_time), migrator_output_handler_interface::VERBOSITY_NORMAL);
} else {
$this->output_handler->write(array('MIGRATION_REVERT_DATA_IN_PROGRESS', $name, $elapsed_time), migrator_output_handler_interface::VERBOSITY_VERY_VERBOSE);
}
} else {
if ($state['migration_schema_done']) {
$verbosity = empty($state['migration_data_state']) ? migrator_output_handler_interface::VERBOSITY_VERBOSE : migrator_output_handler_interface::VERBOSITY_DEBUG;
$this->output_handler->write(array('MIGRATION_REVERT_SCHEMA_RUNNING', $name), $verbosity);
$total_time = is_array($state['migration_data_state']) && isset($state['migration_data_state']['_total_time']) ? $state['migration_data_state']['_total_time'] : 0.0;
$elapsed_time = microtime(true);
$steps = $this->helper->get_schema_steps($migration->revert_schema());
$result = $this->process_data_step($steps, $state['migration_data_state']);
$elapsed_time = microtime(true) - $elapsed_time;
$total_time += $elapsed_time;
if (is_array($result)) {
$result['_total_time'] = $total_time;
}
$state['migration_data_state'] = $result === true ? '' : $result;
$state['migration_schema_done'] = $result === true ? false : true;
if (!$state['migration_schema_done']) {
$sql = 'DELETE FROM ' . $this->migrations_table . "\n\t\t\t\t\tWHERE migration_name = '" . $this->db->sql_escape($name) . "'";
$this->db->sql_query($sql);
$this->last_run_migration = false;
unset($this->migration_state[$name]);
$this->output_handler->write(array('MIGRATION_REVERT_SCHEMA_DONE', $name, $total_time), migrator_output_handler_interface::VERBOSITY_NORMAL);
} else {
$this->set_migration_state($name, $state);
$this->output_handler->write(array('MIGRATION_REVERT_SCHEMA_IN_PROGRESS', $name, $elapsed_time), migrator_output_handler_interface::VERBOSITY_VERY_VERBOSE);
}
}
}
return true;
}
/**
* @dataProvider update_data_provider
*/
public function test_get_schema_steps($data_changes, $expected)
{
$this->assertEquals($expected, $this->helper->reverse_update_data($data_changes));
}
/**
* Attempts to revert a step of the given migration or one of its dependencies
*
* @param string $name The class name of the migration
* @return bool Whether any update step was successfully run
*/
protected function try_revert($name)
{
if (!class_exists($name))
{
return false;
}
$migration = $this->get_migration($name);
$state = $this->migration_state[$name];
$this->last_run_migration = array(
'name' => $name,
'class' => $migration,
'task' => '',
);
if ($state['migration_data_done'])
{
$this->output_handler->write(array('MIGRATION_REVERT_DATA_RUNNING', $name), migrator_output_handler_interface::VERBOSITY_VERBOSE);
$elapsed_time = microtime(true);
if ($state['migration_data_state'] !== 'revert_data')
{
$result = $this->process_data_step($migration->update_data(), $state['migration_data_state'], true);
$state['migration_data_state'] = ($result === true) ? 'revert_data' : $result;
}
else
{
$result = $this->process_data_step($migration->revert_data(), '', false);
$state['migration_data_state'] = ($result === true) ? '' : $result;
$state['migration_data_done'] = ($result === true) ? false : true;
}
$this->set_migration_state($name, $state);
$elapsed_time = microtime(true) - $elapsed_time;
if ($state['migration_data_done'])
{
$this->output_handler->write(array('MIGRATION_REVERT_DATA_DONE', $name, $elapsed_time), migrator_output_handler_interface::VERBOSITY_NORMAL);
}
else
{
$this->output_handler->write(array('MIGRATION_REVERT_DATA_IN_PROGRESS', $name, $elapsed_time), migrator_output_handler_interface::VERBOSITY_VERY_VERBOSE);
}
}
else if ($state['migration_schema_done'])
{
$this->output_handler->write(array('MIGRATION_REVERT_SCHEMA_RUNNING', $name), migrator_output_handler_interface::VERBOSITY_VERBOSE);
$elapsed_time = microtime(true);
$steps = $this->helper->get_schema_steps($migration->revert_schema());
$result = $this->process_data_step($steps, $state['migration_data_state']);
$state['migration_data_state'] = ($result === true) ? '' : $result;
$state['migration_schema_done'] = ($result === true) ? false : true;
if (!$state['migration_schema_done'])
{
$sql = 'DELETE FROM ' . $this->migrations_table . "
WHERE migration_name = '" . $this->db->sql_escape($name) . "'";
$this->db->sql_query($sql);
unset($this->migration_state[$name]);
}
$elapsed_time = microtime(true) - $elapsed_time;
$this->output_handler->write(array('MIGRATION_REVERT_SCHEMA_DONE', $name, $elapsed_time), migrator_output_handler_interface::VERBOSITY_NORMAL);
}
return true;
}
