$from public property The collection to be selected from. If string considered as the name of the collection inside the default database. If array - first element considered as the name of the database, second - as name of collection inside that database See also from(). public string|array $from = null

$collection public read-only property Collection instance. public yii\mongodb\Collection getCollection ( $db = null )

update() public method Updates the rows, which matches given criteria by given data. Note: for "multiple" mode Mongo requires explicit strategy "$set" or "$inc" to be specified for the "newData". If no strategy is passed "$set" will be used. public integer|boolean update ( $collection, $condition, $newData, $options = [] )$collection array|string Collection name. $condition array Description of the objects to update. $newData array The object with which to update the matching recor

save() public method Update the existing database data, otherwise insert this data public \MongoDB\BSON\ObjectID save ( $collection, $data, $options = [] )$collection array|string Collection name. $data array|object Data to be updated/inserted. $options array List of options in format: optionName => optionValue. return \MongoDB\BSON\ObjectID Updated/new record id instance.

remove() public method Removes data from the collection. public integer|boolean remove ( $collection, $condition = [], $options = [] )$collection array|string Collection name. $condition array Description of records to remove. $options array List of options in format: optionName => optionValue. return integer|boolean Number of updated documents or whether operation was successful.

log() protected method (available since version 2.1.1) Logs the incoming message. By default this method sends message to 'stdout'. protected void log ( $string )$string string Message to be logged.

insert() public method Inserts new data into collection. public \MongoDB\BSON\ObjectID insert ( $collection, $data, $options = [] )$collection array|string Collection name. $data array|object Data to be inserted. $options array List of options in format: optionName => optionValue. return \MongoDB\BSON\ObjectID New record id instance.

init() public method Initializes the migration. This method will set $db to be the 'db' application component, if it is null. public void init ( )

endProfile() protected method (available since version 2.1.1) Marks the end of a code block for profiling. protected void endProfile ( $token )$token string Token for the code block.

dropIndexes() public method (available since version 2.1) Drops collection indexes by name. public void dropIndexes ( $collection, $indexes )$collection string|array Name of the collection $indexes string Wildcard for name of the indexes to be dropped.