Pesquisas recentes:
mongocollection functions ,
include functions ,
variable functions ,
post functions
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(PECL mongo >=0.9.0)
MongoCollection::ensureIndex — Creates an index on the given field(s), or does nothing if the index already exists
A unique index cannot be created on a field if multiple existing documents do not contain the field. The field is effectively NULL for these documents and thus already non-unique.
Field or fields to use as index.
If the index should be unique.
Returns TRUE.
Exemplo #1 MongoCollection::ensureIndex() example
<?php
$c = new MongoCollection($db, 'foo');
// create an index on 'x' ascending
$c->ensureIndex('x');
// create an index on 'y' ascending
$c->ensureIndex(array('y' => 1));
// create an index on 'w' descending
$c->ensureIndex(array('w' => -1));
// create an index on 'z' ascending and 'zz' descending
$c->ensureIndex(array('z' => 1, 'zz' => -1));
// create a unique index on 'x'
$c->ensureIndex(array('x' => 1), true);
?>
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