MongoCursor::fields

(PECL mongo >=1.0.6)

MongoCursor::fields — Sets the fields for a query

说明

public MongoCursor MongoCursor::fields ( array $f )

Fields are specified by "fieldname" : bool. TRUE indicates that a field should be returned, FALSE indicates that it should not be returned. You can also use 1 and 0 instead of TRUE and FALSE .

Thus, to return only the "summary" field, one could say:

  <?php

$cursor -> fields (array( "summary"  =>  true ));

 ?>

To return all fields except the "hidden" field:

  <?php

$cursor -> fields (array( "hidden"  =>  false ));

 ?>

参数

f: Fields to return (or not return).

返回值

Returns this cursor.

错误／异常

Throws MongoCursorException if this cursor has started iterating or a scalar argument is given.