PHP - Manual: MongoDB\Driver\Query::__construct
2024-11-14
(mongodb >=1.0.0)
MongoDB\Driver\Query::__construct — Create a new Query
$filter
, array $queryOptions
= ?)Constructs a new MongoDB\Driver\Query, which is an immutable value object that represents a database query. The query may then be executed with MongoDB\Driver\Manager::executeQuery().
filter
(array|object)The » query predicate. An empty predicate will match all documents in the collection.
注意: When evaluating query criteria, MongoDB compares types and values according to its own » comparison rules for BSON types, which differs from PHP's comparison and type juggling rules. When matching a special BSON type the query criteria should use the respective BSON class (e.g. use MongoDB\BSON\ObjectId to match an » ObjectId).
queryOptions
Option | Type | Description |
---|---|---|
allowDiskUse | bool |
Allows MongoDB to use temporary disk files to store data exceeding the 100 megabyte system memory limit while processing a blocking sort operation. |
allowPartialResults | bool |
For queries against a sharded collection, returns partial results from the mongos if some shards are unavailable instead of throwing an error.
Falls back to the deprecated |
awaitData | bool |
Use in conjunction with the "tailable" option to
block a getMore operation on the cursor temporarily if at the end of
data rather than returning no data. After a timeout period, the query
returns as normal.
|
batchSize | int |
The number of documents to return in the first batch. Defaults to 101. A batch size of 0 means that the cursor will be established, but no documents will be returned in the first batch. In versions of MongoDB before 3.2, where queries use the legacy wire protocol OP_QUERY, a batch size of 1 will close the cursor irrespective of the number of matched documents. |
collation | array|object |
» Collation allows users to specify language-specific rules for string comparison, such as rules for lettercase and accent marks. When specifying collation, the If the collation is unspecified but the collection has a default collation, the operation uses the collation specified for the collection. If no collation is specified for the collection or for the operation, MongoDB uses the simple binary comparison used in prior versions for string comparisons. This option is available in MongoDB 3.4+ and will result in an exception at execution time if specified for an older server version. |
comment | mixed |
An arbitrary comment to help trace the operation through the database profiler, currentOp output, and logs. The comment can be any valid BSON type for MongoDB 4.4+. Earlier server versions only support string values.
Falls back to the deprecated |
exhaust | bool |
Stream the data down full blast in multiple "more" packages, on the assumption that the client will fully read all data queried. Faster when you are pulling a lot of data and know you want to pull it all down. Note: the client is not allowed to not read all the data unless it closes the connection. This option is not supported by the find command in MongoDB 3.2+ and will force the driver to use the legacy wire protocol version (i.e. OP_QUERY). |
explain | bool |
If
Falls back to the deprecated This option is not supported by the find command in MongoDB 3.2+ and will only be respected when using the legacy wire protocol version (i.e. OP_QUERY). The » explain command should be used on MongoDB 3.0+. |
hint | string|array|object |
Index specification. Specify either the index name as a string or the index key pattern. If specified, then the query system will only consider plans using the hinted index.
Falls back to the deprecated |
let | array|object |
Map of parameter names and values. Values must be constant or closed expressions that do not reference document fields. Parameters can then be accessed as variables in an aggregate expression context (e.g. This option is available in MongoDB 5.0+ and will result in an exception at execution time if specified for an older server version. |
limit | int |
The maximum number of documents to return. If unspecified, then defaults to no limit. A limit of 0 is equivalent to setting no limit.
A negative limit is will be interpreted as a positive limit with the
|
max | array|object |
The exclusive upper bound for a specific index.
Falls back to the deprecated |
maxAwaitTimeMS | int |
Positive integer denoting the time limit in milliseconds for the
server to block a getMore operation if no data is available. This
option should only be used in conjunction with the
|
maxScan | int |
警告
This option is deprecated and should not be used. Positive integer denoting the maximum number of documents or index keys to scan when executing the query.
Falls back to the deprecated |
maxTimeMS | int |
The cumulative time limit in milliseconds for processing operations on the cursor. MongoDB aborts the operation at the earliest following interrupt point.
Falls back to the deprecated |
min | array|object |
The inclusive lower bound for a specific index.
Falls back to the deprecated |
modifiers | array | » Meta operators modifying the output or behavior of a query. Use of these operators is deprecated in favor of named options. |
noCursorTimeout | bool | Prevents the server from timing out idle cursors after an inactivity period (10 minutes). |
oplogReplay | bool |
Internal use for replica sets. To use oplogReplay, you must include the following condition in the filter:
[ 'ts' => [ '$gte' => <timestamp> ] ]
|
projection | array|object |
The » projection specification to determine which fields to include in the returned documents. If you are using the ODM functionality to deserialise documents as their original PHP class, make sure that you include the __pclass field in the projection. This is required for the deserialization to work and without it, the driver will return (by default) a stdClass object instead. |
readConcern | MongoDB\Driver\ReadConcern |
A read concern to apply to the operation. By default, the read concern from the MongoDB Connection URI will be used. This option is available in MongoDB 3.2+ and will result in an exception at execution time if specified for an older server version. |
returnKey | bool |
If
Falls back to the deprecated |
showRecordId | bool |
Determines whether to return the record identifier for each
document. If
Falls back to the deprecated |
singleBatch | bool |
Determines whether to close the cursor after the first batch.
Defaults to false .
|
skip | int | Number of documents to skip. Defaults to 0. |
snapshot | bool |
警告
This option is deprecated and should not be used. Prevents the cursor from returning a document more than once because of an intervening write operation.
Falls back to the deprecated |
sort | array|object |
The sort specification for the ordering of the results.
Falls back to the deprecated |
tailable | bool | Returns a tailable cursor for a capped collection. |
版本 | 说明 |
---|---|
PECL mongodb 1.14.0 |
Added the |
PECL mongodb 1.8.0 |
Added the
The |
PECL mongodb 1.5.0 |
The |
PECL mongodb 1.3.0 |
Added the |
PECL mongodb 1.2.0 |
Added the
Renamed the
Removed the legacy |
PECL mongodb 1.1.0 | Added the "readConcern" option. |
示例 #1 MongoDB\Driver\Query::__construct() example
<?php
/* Select only documents authord by "bjori" with at least 100 views */
$filter = [
'author' => 'bjori',
'views' => [
'$gte' => 100,
],
];
$options = [
/* Only return the following fields in the matching documents */
'projection' => [
'title' => 1,
'article' => 1,
],
/* Return the documents in descending order of views */
'sort' => [
'views' => -1
],
];
$query = new MongoDB\Driver\Query($filter, $options);
$manager = new MongoDB\Driver\Manager('mongodb://localhost:27017');
$readPreference = new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::RP_PRIMARY);
$cursor = $manager->executeQuery('databaseName.collectionName', $query, $readPreference);
foreach($cursor as $document) {
var_dump($document);
}
?>
官方地址:https://www.php.net/manual/en/mongodb-driver-query.construct.php