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<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\log;
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use Yii;
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use yii\db\Connection;
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use yii\base\InvalidConfigException;
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/**
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* DbTarget stores log messages in a database table.
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*
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* By default, DbTarget stores the log messages in a DB table named 'tbl_log'. This table
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* must be pre-created. The table name can be changed by setting [[logTable]].
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class DbTarget extends Target
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{
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/**
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* @var Connection|string the DB connection object or the application component ID of the DB connection.
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* After the DbTarget object is created, if you want to change this property, you should only assign it
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* with a DB connection object.
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*/
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public $db = 'db';
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/**
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* @var string name of the DB table to store cache content.
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* The table should be pre-created as follows:
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*
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* ~~~
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* CREATE TABLE tbl_log (
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* id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
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* level INTEGER,
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* category VARCHAR(255),
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* log_time INTEGER,
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* message TEXT,
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* INDEX idx_log_level (level),
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* INDEX idx_log_category (category)
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* )
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* ~~~
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*
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* Note that the 'id' column must be created as an auto-incremental column.
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* The above SQL uses the MySQL syntax. If you are using other DBMS, you need
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* to adjust it accordingly. For example, in PostgreSQL, it should be `id SERIAL PRIMARY KEY`.
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*
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* The indexes declared above are not required. They are mainly used to improve the performance
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* of some queries about message levels and categories. Depending on your actual needs, you may
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* want to create additional indexes (e.g. index on `log_time`).
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*/
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public $logTable = 'tbl_log';
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/**
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* Initializes the DbTarget component.
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* This method will initialize the [[db]] property to make sure it refers to a valid DB connection.
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* @throws InvalidConfigException if [[db]] is invalid.
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*/
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public function init()
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{
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parent::init();
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if (is_string($this->db)) {
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$this->db = Yii::$app->getComponent($this->db);
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}
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if (!$this->db instanceof Connection) {
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throw new InvalidConfigException("DbTarget::db must be either a DB connection instance or the application component ID of a DB connection.");
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}
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}
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/**
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* Stores log messages to DB.
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*/
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public function export()
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{
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$tableName = $this->db->quoteTableName($this->logTable);
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$sql = "INSERT INTO $tableName ([[level]], [[category]], [[log_time]], [[message]])
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VALUES (:level, :category, :log_time, :message)";
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$command = $this->db->createCommand($sql);
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foreach ($this->messages as $message) {
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$command->bindValues(array(
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':level' => $message[1],
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':category' => $message[2],
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':log_time' => $message[3],
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':message' => $message[0],
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))->execute();
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}
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}
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}
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