A file collection object is usually created by calling [[Database::getFileCollection()]] or [[Connection::getFileCollection()]].
File collection inherits all interface from regular [[\yii\mongo\Collection]], adding methods to store files.
/**
* Fetches associated file collection from stream options.
* @return Collection file collection instance.
* @throws InvalidConfigException on invalid stream options.
*/
private function fetchCollection()
{
$contextOptions = $this->getContextOptions();
if (isset($contextOptions[$this->protocol]['collection'])) {
$collection = $contextOptions[$this->protocol]['collection'];
if ($collection instanceof Collection) {
throw new InvalidConfigException('"collection" context option should be an instance of "' . Collection::className() . '"');
}
return $collection;
}
if (isset($contextOptions[$this->protocol]['db'])) {
$connection = $contextOptions[$this->protocol]['db'];
} else {
$connection = 'mongodb';
}
/* @var $connection Connection */
$connection = Instance::ensure($connection, Connection::className());
list($databaseName, $collectionPrefix) = explode('.', $this->namespace, 2);
return $connection->getDatabase($databaseName)->getFileCollection($collectionPrefix);
}
