$db public property The DB connection object or the application component ID of the DB connection. After the DbTarget object is created, if you want to change this property, you should only assign it with a DB connection object. Starting from version 2.0.2, this can also be a configuration array for creating the object. public yii\db\Connection|array|string $db = 'db'

$union public property This is used to construct the UNION clause(s) in a SQL statement. Each array element is an array of the following structure: query: either a string or a yii\db\Query object representing a query all: boolean, whether it should be UNION ALL or UNION public array $union = null

$sourceLanguage public property The language that the original messages are in. If not set, it will use the value of yii\base\Application::$sourceLanguage. public string $sourceLanguage = null

EVENT_MISSING_TRANSLATION event of type yii\i18n\MissingTranslationEvent An event that is triggered when a message translation is not found.

$textLayout public property Text layout view name. This is the layout used to render TEXT mail body. Please refer to $htmlLayout for possible values that this property can take. public string|boolean $textLayout = 'layouts/text'

$tableNames public read-only property All table names in the database. public string[] getTableNames ( $schema = '', $refresh = false )

init() public method Initializes the object. This method is invoked at the end of the constructor after the object is initialized with the given configuration. public void init ( )

$headerRowOptions public property The HTML attributes for the table header row. See also yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered. public array $headerRowOptions = []

fetchData() protected method Fetches the next batch of data. protected array fetchData ( )return array The data fetched

beforeAction() public method This method is invoked right before an action within this module is executed. The method will trigger the EVENT_BEFORE_ACTION event. The return value of the method will determine whether the action should continue to run. In case the action should not run, the request should be handled inside of the beforeAction code by either providing the necessary output or redirecting the request. Otherwise the response will be empty. If you override this method, your code s