lib/gii/cascadeTypeModule/Generator.php
public function getMigrationClassName()
    {
        $postfix = '_initial_' . $this->tableName;
        if (is_dir($this->migrationDirectory)) {
            $searchExisting = FileHelper::findFiles($this->migrationDirectory, ['only' => [$postfix . '.php']]);
            if (!empty($searchExisting)) {
                return strstr(basename($searchExisting[0]), '.php', true);
            }
        }

        return  'm' . gmdate('ymd_His', $this->migrationTimestamp) . $postfix;
    }
public function getMigrationClassName()
    {
        $postfix = '_initial_' . $this->tableName;
        if (is_dir($this->migrationDirectory)) {
            $searchExisting = FileHelper::findFiles($this->migrationDirectory, ['only' => [$postfix . '.php']]);
            if (!empty($searchExisting)) {
                return strstr(basename($searchExisting[0]), '.php', true);
            }
        }

        return  'm' . gmdate('ymd_His', $this->migrationTimestamp) . $postfix;
    }
Get migration class name.

@return string the model namespace of the module.