mongodb\Query scalar()

scalar() public method (available since version 2.1.2)

Returns the query result as a scalar value.

The value returned will be the first column in the first row of the query results. Column _id will be automatically excluded from select fields, if select() is not empty and _id is not selected explicitly.

public string\|null\|false scalar ( $db = null )
$db	yii\mongodb\Connection	The MongoDB connection used to generate the query. If this parameter is not given, the `mongodb` application component will be used.
return	string\|null\|false	The value of the first column in the first row of the query result. `false` is returned if the query result is empty.

Links:

http://www.yiiframework.com/doc-2.0/yii-mongodb-query.html#scalar()-detail

doc_Yii

2016-10-30 17:09:01

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