createActiveRecordModel(): support prefixing table name with database…

… name

ModelHelper.php

@@ -227,16 +227,16 @@ public static function filterAttributes($all_attributes, $attributes_to_keep) {
 	 * Dynamically create an ActiveRecord model
 	 *
 	 * @param array $params : Array with these entries:
-	 *   - `tableName` (req.) : Name of database table
+	 *   - `tableName` (req.) : Name of database table. Database can be specified using normal SQL notation: `databasename.tablename`
 	 *
 	 * @return string : Class name to be instantiated
 	 */
 	public static function createActiveRecordModel($params) {
-		if (preg_match("/[^a-z0-9_]/i", $params['tableName'])) {
+		if (preg_match("/[^a-z0-9_\\.]/i", $params['tableName'])) {
 			new \winternet\yii2\UserException('Table name for creating ActiveRecord class has invalid characters.', ['TableName' => $params['tableName']]);
 		}
 
-		$className = $params['tableName'];
+		$className = str_replace('.', '__', $params['tableName']);
 
 		$phpCode  = "class ". $className ." extends \yii\db\ActiveRecord { public static function tableName() {return '". $params['tableName'] ."';} }". PHP_EOL;
 		eval($phpCode);