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<?php |
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/** |
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* TDataSourceConfig class file. |
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* |
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* @author Wei Zhuo <weizhuo[at]gmail[dot]com> |
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* @link https://github.com/pradosoft/prado |
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* @license https://github.com/pradosoft/prado/blob/master/LICENSE |
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*/ |
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namespace Prado\Data; |
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use Prado\Exceptions\TConfigurationException; |
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use Prado\Prado; |
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use Prado\TApplication; |
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/** |
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* TDataSourceConfig module class provides <module> configuration for database connections. |
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* |
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* Example usage: mysql connection |
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* ```php |
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* <modules> |
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* <module id="db1"> |
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* <database ConnectionString="mysqli:host=localhost;dbname=test" |
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* username="dbuser" password="dbpass" /> |
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* </module> |
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* </modules> |
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* ``` |
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* |
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* Usage in php: |
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* ```php |
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* class Home extends TPage |
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* { |
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* function onLoad($param) |
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* { |
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* $db = $this->Application->Modules['db1']->DbConnection; |
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* $db->createCommand('...'); //... |
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* } |
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* } |
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* ``` |
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* |
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* The properties of <connection> are those of the class TDbConnection. |
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* Set {@see setConnectionClass} attribute for a custom database connection class |
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* that extends the TDbConnection class. |
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* |
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* @author Wei Zhuo <weizho[at]gmail[dot]com> |
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* @since 3.1 |
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*/ |
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class TDataSourceConfig extends \Prado\TModule |
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{ |
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private $_connID = ''; |
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private $_conn; |
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private $_connClass = \Prado\Data\TDbConnection::class; |
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/** |
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* Initalize the database connection properties from attributes in <database> tag. |
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* @param \Prado\Xml\TXmlDocument $config xml or php configuration. |
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*/ |
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public function init($config) |
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{ |
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if ($this->getApplication()->getConfigurationType() == TApplication::CONFIG_TYPE_PHP) { |
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if (isset($config['database']) && is_array($config['database'])) { |
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$db = $this->getDbConnection(); |
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foreach ($config['database'] as $name => $value) { |
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$db->setSubProperty($name, $value); |
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} |
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} |
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} else { |
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if ($prop = $config->getElementByTagName('database')) { |
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$db = $this->getDbConnection(); |
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foreach ($prop->getAttributes() as $name => $value) { |
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$db->setSubproperty($name, $value); |
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} |
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} |
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} |
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parent::init($config); |
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} |
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/** |
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* The module ID of another TDataSourceConfig. The {@see getDbConnection DbConnection} |
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* property of this configuration will equal to {@see getDbConnection DbConnection} |
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* of the given TDataSourceConfig module. |
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* @param string $value module ID. |
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*/ |
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public function setConnectionID($value) |
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{ |
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$this->_connID = $value; |
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} |
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/** |
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* @return string connection module ID. |
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*/ |
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public function getConnectionID() |
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{ |
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return $this->_connID; |
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} |
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/** |
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* Gets the TDbConnection from another module if {@see setConnectionID ConnectionID} |
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* is supplied and valid. Otherwise, a connection of type given by |
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* {@see setConnectionClass ConnectionClass} is created. |
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* @return \Prado\Data\TDbConnection database connection. |
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*/ |
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public function getDbConnection() |
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{ |
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1 |
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if ($this->_conn === null) { |
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1 |
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if ($this->_connID !== '') { |
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$this->_conn = $this->findConnectionByID($this->getConnectionID()); |
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} else { |
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1 |
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$this->_conn = Prado::createComponent($this->getConnectionClass()); |
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} |
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} |
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return $this->_conn; |
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} |
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/** |
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* Alias for getDbConnection(). |
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* @return \Prado\Data\TDbConnection database connection. |
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*/ |
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public function getDatabase() |
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{ |
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return $this->getDbConnection(); |
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} |
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/** |
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* @return string Database connection class name to be created. |
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*/ |
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1 |
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public function getConnectionClass() |
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{ |
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return $this->_connClass; |
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} |
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/** |
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* The database connection class name to be created when {@see getDbConnection} |
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* method is called <b>and</b> {@see setConnectionID ConnectionID} is null. The |
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* {@see setConnectionClass ConnectionClass} property must be set before |
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* calling {@see getDbConnection} if you wish to create the connection using the |
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* given class name. |
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* @param string $value Database connection class name. |
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* @throws TConfigurationException when database connection is already established. |
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*/ |
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public function setConnectionClass($value) |
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{ |
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if ($this->_conn !== null) { |
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throw new TConfigurationException('datasource_dbconnection_exists', $value); |
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} |
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$this->_connClass = $value; |
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} |
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/** |
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* Finds the database connection instance from the Application modules. |
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* @param string $id Database connection module ID. |
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* @throws TConfigurationException when module is not of TDbConnection or TDataSourceConfig. |
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* @return \Prado\Data\TDbConnection database connection. |
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*/ |
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protected function findConnectionByID($id) |
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{ |
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$conn = $this->getApplication()->getModule($id); |
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if ($conn instanceof TDbConnection) { |
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return $conn; |
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} elseif ($conn instanceof TDataSourceConfig) { |
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return $conn->getDbConnection(); |
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} else { |
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throw new TConfigurationException('datasource_dbconnection_invalid', $id); |
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} |
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} |
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} |
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This check looks for function or method calls that always return null and whose return value is assigned to a variable.
The method
getObject()can return nothing but null, so it makes no sense to assign that value to a variable.The reason is most likely that a function or method is imcomplete or has been reduced for debug purposes.