A collection object is usually created by calling [[Database::getCollection()]] or [[Connection::getCollection()]].
Collection provides the basic interface for the Mongo queries, mostly: insert, update, delete operations.
For example:
php
$collection = Yii::$app->mongodb->getCollection('customer');
$collection->insert(['name' => 'John Smith', 'status' => 1]);
Collection also provides shortcut for Command methods, such as Collection::group, Collection::mapReduce and so on.
To perform "find" queries, please use Query instead.
/**
* Removes data from the collection.
* @param array $condition description of records to remove.
* @param array $options list of options in format: optionName => optionValue.
* @return integer|boolean number of updated documents or whether operation was successful.
* @throws Exception on failure.
*/
public function remove($condition = [], $options = [])
{
$result = parent::remove($condition, $options);
$this->tryLastError();
// MongoGridFS::remove will return even if the remove failed
return $result;
}
/**
* @inheritdoc
* @return Cursor cursor for the search results
*/
public function find($condition = [], $fields = [], $options = [])
{
return new Cursor($this, parent::find($condition, $fields, $options));
}
/**
* Finds all records in collection.
* @param \yii\mongodb\Collection $collection
* @param array $condition
* @param array $fields
* @return array rows
*/
protected function findAll($collection, $condition = [], $fields = [])
{
$cursor = $collection->find($condition, $fields);
$result = [];
foreach ($cursor as $data) {
$result[] = $data;
}
return $result;
}