private function _getMongodbCollection($config, $collection)
{
if (!isset(Config::config()->{$config}['db']) || !isset(Config::config()->{$config}['host']) || !isset(Config::config()->{$config}['port'])) {
return 'db config error';
}
try {
$dbName = Config::config()->{$config}['db'];
$db = new \MongoClient('mongodb://' . Config::config()->{$config}['host'] . ':' . Config::config()->{$config}['port']);
$db = $db->{$dbName};
$one = $db->{$collection}->findOne();
if ($one) {
$field = [];
foreach ($one as $k => $v) {
$field[] = $k;
}
return $field;
} else {
return 'no record for ' . $collection;
}
} catch (\Exception $e) {
return 'connection mongodb failed';
}
}
