abstract class DatabaseTasks in Drupal 7
Database installer structure.
Defines basic Drupal requirements for databases.
Hierarchy
- class \DatabaseTasks
Expanded class hierarchy of DatabaseTasks
File
- includes/
install.inc, line 290 - API functions for installing modules and themes.
View source
abstract class DatabaseTasks {
/**
* Structure that describes each task to run.
*
* @var array
*
* Each value of the tasks array is an associative array defining the function
* to call (optional) and any arguments to be passed to the function.
*/
protected $tasks = array(
array(
'function' => 'checkEngineVersion',
'arguments' => array(),
),
array(
'arguments' => array(
'CREATE TABLE {drupal_install_test} (id int NULL)',
'Drupal can use CREATE TABLE database commands.',
'Failed to <strong>CREATE</strong> a test table on your database server with the command %query. The server reports the following message: %error.<p>Are you sure the configured username has the necessary permissions to create tables in the database?</p>',
TRUE,
),
),
array(
'arguments' => array(
'INSERT INTO {drupal_install_test} (id) VALUES (1)',
'Drupal can use INSERT database commands.',
'Failed to <strong>INSERT</strong> a value into a test table on your database server. We tried inserting a value with the command %query and the server reported the following error: %error.',
),
),
array(
'arguments' => array(
'UPDATE {drupal_install_test} SET id = 2',
'Drupal can use UPDATE database commands.',
'Failed to <strong>UPDATE</strong> a value in a test table on your database server. We tried updating a value with the command %query and the server reported the following error: %error.',
),
),
array(
'arguments' => array(
'DELETE FROM {drupal_install_test}',
'Drupal can use DELETE database commands.',
'Failed to <strong>DELETE</strong> a value from a test table on your database server. We tried deleting a value with the command %query and the server reported the following error: %error.',
),
),
array(
'arguments' => array(
'DROP TABLE {drupal_install_test}',
'Drupal can use DROP TABLE database commands.',
'Failed to <strong>DROP</strong> a test table from your database server. We tried dropping a table with the command %query and the server reported the following error %error.',
),
),
);
/**
* Results from tasks.
*
* @var array
*/
protected $results = array();
/**
* Ensure the PDO driver is supported by the version of PHP in use.
*/
protected function hasPdoDriver() {
return in_array($this->pdoDriver, PDO::getAvailableDrivers());
}
/**
* Assert test as failed.
*/
protected function fail($message) {
$this->results[$message] = FALSE;
}
/**
* Assert test as a pass.
*/
protected function pass($message) {
$this->results[$message] = TRUE;
}
/**
* Check whether Drupal is installable on the database.
*/
public function installable() {
return $this
->hasPdoDriver() && empty($this->error);
}
/**
* Return the human-readable name of the driver.
*/
public abstract function name();
/**
* Return the minimum required version of the engine.
*
* @return
* A version string. If not NULL, it will be checked against the version
* reported by the Database engine using version_compare().
*/
public function minimumVersion() {
return NULL;
}
/**
* Run database tasks and tests to see if Drupal can run on the database.
*/
public function runTasks() {
// We need to establish a connection before we can run tests.
if ($this
->connect()) {
foreach ($this->tasks as $task) {
if (!isset($task['function'])) {
$task['function'] = 'runTestQuery';
}
if (method_exists($this, $task['function'])) {
// Returning false is fatal. No other tasks can run.
if (FALSE === call_user_func_array(array(
$this,
$task['function'],
), $task['arguments'])) {
break;
}
}
else {
throw new DatabaseTaskException(st("Failed to run all tasks against the database server. The task %task wasn't found.", array(
'%task' => $task['function'],
)));
}
}
}
// Check for failed results and compile message
$message = '';
foreach ($this->results as $result => $success) {
if (!$success) {
$message .= '<p class="error">' . $result . '</p>';
}
}
if (!empty($message)) {
$message = 'Resolve all issues below to continue the installation. For help configuring your database server, see the <a href="http://drupal.org/getting-started/install">installation handbook</a>, or contact your hosting provider.' . $message;
throw new DatabaseTaskException($message);
}
}
/**
* Check if we can connect to the database.
*/
protected function connect() {
try {
// This doesn't actually test the connection.
db_set_active();
// Now actually do a check.
Database::getConnection();
$this
->pass('Drupal can CONNECT to the database ok.');
} catch (Exception $e) {
$this
->fail(st('Failed to connect to your database server. The server reports the following message: %error.<ul><li>Is the database server running?</li><li>Does the database exist, and have you entered the correct database name?</li><li>Have you entered the correct username and password?</li><li>Have you entered the correct database hostname?</li></ul>', array(
'%error' => $e
->getMessage(),
)));
return FALSE;
}
return TRUE;
}
/**
* Run SQL tests to ensure the database can execute commands with the current user.
*/
protected function runTestQuery($query, $pass, $fail, $fatal = FALSE) {
try {
db_query($query);
$this
->pass(st($pass));
} catch (Exception $e) {
$this
->fail(st($fail, array(
'%query' => $query,
'%error' => $e
->getMessage(),
'%name' => $this
->name(),
)));
return !$fatal;
}
}
/**
* Check the engine version.
*/
protected function checkEngineVersion() {
if ($this
->minimumVersion() && version_compare(Database::getConnection()
->version(), $this
->minimumVersion(), '<')) {
$this
->fail(st("The database version %version is less than the minimum required version %minimum_version.", array(
'%version' => Database::getConnection()
->version(),
'%minimum_version' => $this
->minimumVersion(),
)));
}
}
/**
* Return driver specific configuration options.
*
* @param $database
* An array of driver specific configuration options.
*
* @return
* The options form array.
*/
public function getFormOptions($database) {
$form['database'] = array(
'#type' => 'textfield',
'#title' => st('Database name'),
'#default_value' => empty($database['database']) ? '' : $database['database'],
'#size' => 45,
'#required' => TRUE,
'#description' => st('The name of the database your @drupal data will be stored in. It must exist on your server before @drupal can be installed.', array(
'@drupal' => drupal_install_profile_distribution_name(),
)),
);
$form['username'] = array(
'#type' => 'textfield',
'#title' => st('Database username'),
'#default_value' => empty($database['username']) ? '' : $database['username'],
'#required' => TRUE,
'#size' => 45,
);
$form['password'] = array(
'#type' => 'password',
'#title' => st('Database password'),
'#default_value' => empty($database['password']) ? '' : $database['password'],
'#required' => FALSE,
'#size' => 45,
);
$form['advanced_options'] = array(
'#type' => 'fieldset',
'#title' => st('Advanced options'),
'#collapsible' => TRUE,
'#collapsed' => TRUE,
'#description' => st("These options are only necessary for some sites. If you're not sure what you should enter here, leave the default settings or check with your hosting provider."),
'#weight' => 10,
);
$profile = drupal_get_profile();
$db_prefix = $profile == 'standard' ? 'drupal_' : $profile . '_';
$form['advanced_options']['db_prefix'] = array(
'#type' => 'textfield',
'#title' => st('Table prefix'),
'#default_value' => '',
'#size' => 45,
'#description' => st('If more than one application will be sharing this database, enter a table prefix such as %prefix for your @drupal site here.', array(
'@drupal' => drupal_install_profile_distribution_name(),
'%prefix' => $db_prefix,
)),
'#weight' => 10,
);
$form['advanced_options']['host'] = array(
'#type' => 'textfield',
'#title' => st('Database host'),
'#default_value' => empty($database['host']) ? 'localhost' : $database['host'],
'#size' => 45,
// Hostnames can be 255 characters long.
'#maxlength' => 255,
'#required' => TRUE,
'#description' => st('If your database is located on a different server, change this.'),
);
$form['advanced_options']['port'] = array(
'#type' => 'textfield',
'#title' => st('Database port'),
'#default_value' => empty($database['port']) ? '' : $database['port'],
'#size' => 45,
// The maximum port number is 65536, 5 digits.
'#maxlength' => 5,
'#description' => st('If your database server is listening to a non-standard port, enter its number.'),
);
return $form;
}
/**
* Validates driver specific configuration settings.
*
* Checks to ensure correct basic database settings and that a proper
* connection to the database can be established.
*
* @param $database
* An array of driver specific configuration options.
*
* @return
* An array of driver configuration errors, keyed by form element name.
*/
public function validateDatabaseSettings($database) {
$errors = array();
// Verify the table prefix.
if (!empty($database['prefix']) && is_string($database['prefix']) && !preg_match('/^[A-Za-z0-9_.]+$/', $database['prefix'])) {
$errors[$database['driver'] . '][advanced_options][db_prefix'] = st('The database table prefix you have entered, %prefix, is invalid. The table prefix can only contain alphanumeric characters, periods, or underscores.', array(
'%prefix' => $database['prefix'],
));
}
// Verify the database port.
if (!empty($database['port']) && !is_numeric($database['port'])) {
$errors[$database['driver'] . '][advanced_options][port'] = st('Database port must be a number.');
}
return $errors;
}
}Members
Name |
Modifiers | Type | Description | Overrides |
|---|---|---|---|---|
|
DatabaseTasks:: |
protected | property | Results from tasks. | |
|
DatabaseTasks:: |
protected | property | Structure that describes each task to run. | |
|
DatabaseTasks:: |
protected | function | Check the engine version. | |
|
DatabaseTasks:: |
protected | function | Check if we can connect to the database. | |
|
DatabaseTasks:: |
protected | function | Assert test as failed. | |
|
DatabaseTasks:: |
public | function | Return driver specific configuration options. | 1 |
|
DatabaseTasks:: |
protected | function | Ensure the PDO driver is supported by the version of PHP in use. | |
|
DatabaseTasks:: |
public | function | Check whether Drupal is installable on the database. | |
|
DatabaseTasks:: |
public | function | Return the minimum required version of the engine. | 3 |
|
DatabaseTasks:: |
abstract public | function | Return the human-readable name of the driver. | 3 |
|
DatabaseTasks:: |
protected | function | Assert test as a pass. | |
|
DatabaseTasks:: |
public | function | Run database tasks and tests to see if Drupal can run on the database. | |
|
DatabaseTasks:: |
protected | function | Run SQL tests to ensure the database can execute commands with the current user. | |
|
DatabaseTasks:: |
public | function | Validates driver specific configuration settings. | 1 |