MongoCollection::find

(PECL mongo >=0.9.0)

MongoCollection::findQueries this collection, returning a MongoCursor for the result set

Описание

public MongoCursor MongoCollection::find ([ array $query = array() [, array $fields = array() ]] )

Список параметров

query

The fields for which to search. MongoDB's query language is quite extensive. The PHP driver will in almost all cases pass the query straight through to the server, so reading the MongoDB core docs on » find is a good idea.

Внимание

Please make sure that for all special query operators (starting with $) you use single quotes so that PHP doesn't try to replace "$exists" with the value of the variable $exists.

fields

Fields of the results to return. The array is in the format array('fieldname' => true, 'fieldname2' => true). The _id field is always returned.

Возвращаемые значения

Returns a cursor for the search results.

Примеры

Пример #1 MongoCollection::find() example

This example demonstrates basic search options.

<?php

$m 
= new MongoClient();
$db $m->selectDB('test');
$collection = new MongoCollection($db'produce');

// search for fruits
$fruitQuery = array('Type' => 'Fruit');

$cursor $collection->find($fruitQuery);
foreach (
$cursor as $doc) {
    
var_dump($doc);
}

// search for produce that is sweet. Taste is a child of Details. 
$sweetQuery = array('Details.Taste' => 'Sweet');
echo 
"Sweet\n";
$cursor $collection->find($sweetQuery);
foreach (
$cursor as $doc) {
    
var_dump($doc);
}

?>

Результат выполнения данного примера:

array(4) {
  ["_id"]=>
  object(MongoId)#7 (1) {
    ["$id"]=>
    string(24) "50a87dd084f045a19b220dd6"
  }
  ["Name"]=>
  string(5) "Apple"
  ["Type"]=>
  string(5) "Fruit"
  ["Details"]=>
  array(2) {
    ["Taste"]=>
    string(5) "Sweet"
    ["Colour"]=>
    string(3) "Red"
  }
}
array(4) {
  ["_id"]=>
  object(MongoId)#8 (1) {
    ["$id"]=>
    string(24) "50a87de084f045a19b220dd7"
  }
  ["Name"]=>
  string(5) "Lemon"
  ["Type"]=>
  string(5) "Fruit"
  ["Details"]=>
  array(2) {
    ["Taste"]=>
    string(4) "Sour"
    ["Colour"]=>
    string(5) "Green"
  }
}

Sweet:
array(4) {
  ["_id"]=>
  object(MongoId)#7 (1) {
    ["$id"]=>
    string(24) "50a87dd084f045a19b220dd6"
  }
  ["Name"]=>
  string(5) "Apple"
  ["Type"]=>
  string(5) "Fruit"
  ["Details"]=>
  array(2) {
    ["Taste"]=>
    string(5) "Sweet"
    ["Colour"]=>
    string(3) "Red"
  }
}

See MongoCursor for more information how to work with cursors.

Пример #2 MongoCollection::find() example

This example demonstrates how to search for a range.

<?php

$m 
= new MongoClient();
$db $m->selectDB('test');
$collection = new MongoCollection($db'phpmanual');

// search for documents where 5 < x < 20
$rangeQuery = array('x' => array( '$gt' => 5'$lt' => 20 ));

$cursor $collection->find($rangeQuery);
foreach (
$cursor as $doc) {
    
var_dump($doc);
}

?>

Результат выполнения данного примера:

array(2) {
  ["_id"]=>
  object(MongoId)#10 (1) {
    ["$id"]=>
    string(24) "4ebc3e3710b89f2349000000"
  }
  ["x"]=>
  int(12)
}
array(2) {
  ["_id"]=>
  object(MongoId)#11 (1) {
    ["$id"]=>
    string(24) "4ebc3e3710b89f2349000001"
  }
  ["x"]=>
  int(12)
}

See MongoCursor for more information how to work with cursors.

Пример #3 MongoCollection::find() example using $where

This example demonstrates how to search a collection using javascript code to reduce the resultset.

<?php

$m 
= new MongoClient();
$db $m->selectDB('test');
$collection = new MongoCollection($db'phpmanual');

$js "function() {
    return this.name == 'Joe' || this.age == 50;
}"
;
$cursor $collection->find(array('$where' => $js));
foreach (
$cursor as $doc) {
    
var_dump($doc);
}

?>

Результат выполнения данного примера:

array(3) {
  ["_id"]=>
  object(MongoId)#7 (1) {
    ["$id"]=>
    string(24) "4ebc3e3710b89f2349000002"
  }
  ["name"]=>
  string(3) "Joe"
  ["age"]=>
  int(20)
}

Пример #4 MongoCollection::find() example using $in

This example demonstrates how to search a collection using the $in operator.

<?php

$m 
= new MongoClient();
$db $m->selectDB('test');
$collection = new MongoCollection($db'phpmanual');

$cursor $collection->find(array(
    
'name' => array('$in' => array('Joe''Wendy'))
));

?>

Результат выполнения данного примера:

array(3) {
  ["_id"]=>
  object(MongoId)#7 (1) {
    ["$id"]=>
    string(24) "4ebc3e3710b89f2349000002"
  }
  ["name"]=>
  string(3) "Joe"
  ["age"]=>
  int(20)
}

Пример #5 Getting results as an array

This returns a MongoCursor. Often, when people are starting out, they are more comfortable using an array. To turn a cursor into an array, use the iterator_to_array() function.

<?php

$m 
= new MongoClient();
$db $m->selectDB('test');
$collection = new MongoCollection($db'phpmanual');

$cursor $collection->find();
$array iterator_to_array($cursor);

?>

Результат выполнения данного примера:

array(3) {
  ["4ebc40af10b89f5149000000"]=>
  array(2) {
    ["_id"]=>
    object(MongoId)#6 (1) {
      ["$id"]=>
      string(24) "4ebc40af10b89f5149000000"
    }
    ["x"]=>
    int(12)
  }
  ["4ebc40af10b89f5149000001"]=>
  array(2) {
    ["_id"]=>
    object(MongoId)#11 (1) {
      ["$id"]=>
      string(24) "4ebc40af10b89f5149000001"
    }
    ["x"]=>
    int(12)
  }
  ["4ebc40af10b89f5149000002"]=>
  array(3) {
    ["_id"]=>
    object(MongoId)#12 (1) {
      ["$id"]=>
      string(24) "4ebc40af10b89f5149000002"
    }
    ["name"]=>
    string(3) "Joe"
    ["age"]=>
    int(20)
  }
}

Using iterator_to_array() forces the driver to load all of the results into memory, so do not do this for result sets that are larger than memory!

Also, certain system collections do not have an _id field. If you are dealing with a collection that might have documents without _ids, pass FALSE as the second argument to iterator_to_array() (so that it will not try to use the non-existent _id values as keys).

Смотрите также

Коментарии

This will work with versions >=1.5.3, please note that this is just a example of the way to use the or statement.

<?php
  $connection 
= new Mongo();

 
$db $connection->test;
 
$collection $db->test;
 
// Clean the DB before the test.
 
$collection->drop();
 
$collection $db->test;

 
$apple = array(
   
'fruit' => 'Apple',
   
'type' => 'Juice',
  );

 
$orange = array(
   
'fruit' => 'Orange',
   
'type' => 'Marmalade',
  );

 
$collection->insert($apple);
 
$collection->insert($orange);

 
// Basic find
 
$results $collection->find(array('fruit' => 'Apple'));

  foreach(
$results as $result)
  {
    echo 
sprintf("Fruit: %s, Type: %s%s"$result['fruit'], $result['type'], PHP_EOL);
  }
?>

Output:

Fruit: Apple, Type: Juice

Now an advanced search with "or" statement.

<?php
 
// Advanced find with "OR" note the double array.
  // if you use double quotes escape the or "\$or"
 
$results $collection->find( array( '$or' => array( array('fruit' => 'Apple'), array('fruit' => 'Orange') ) ) );

  foreach(
$results as $result)
  {
    echo 
sprintf("Fruit: %s, Type: %s%s"$result['fruit'], $result['type'], PHP_EOL);
  }
?>

Output:

Fruit: Apple, Type: Juice
Fruit: Orange, Type: Marmalade
2010-12-09 08:28:39
http://php5.kiev.ua/manual/ru/mongocollection.find.html
For the fields parameter, the documentaion says: "The _id field is always returned".
Knowing that mongodb allows you to uncheck the _id field ("the _id field is the only field that you can explicitly exclude"; source: http://docs.mongodb.org/manual/reference/method/db.collection.find/#db.collection.find), I tried it with php and it works : you can exclude the _id field.

Example : the following fields parameter will exclude the field "_id"

$fields = array('timestamp' => true, 'rank' => true, '_id' => false);
2013-10-28 15:17:03
http://php5.kiev.ua/manual/ru/mongocollection.find.html
Автор:
<?php
$m 
= new MongoClient();
$db $m->selectDB('school');
$collection = new MongoCollection($db'student');
//Find where class=5
$where=array('class'=>5);
$cursor $collection->find($where);

//Find where class !=5
$where=array('class' => array('$ne'=>5));
$cursor $collection->find($where);

//Find where age >20
$where=array('age' => array('$gt'=>20));
$cursor $collection->find($where);

//Find where age >=20
$where=array('age' => array('$gte'=>20));
$cursor $collection->find($where);

//Find where age <20
$where=array('age' => array('$le'=>20));
$cursor $collection->find($where);

//Find where age <=20
$where=array('age' => array('$lte'=>20));
$cursor $collection->find($where);

//Finc where class=10 or marks=80
$where=array( '$or' => array( array(' class' =>10), array('marks'=>80) ) );
$cursor $collection->find($where);
//Finc where class=12 AND marks=70
$where=array( '$and' => array( array(' class' =>12), array('marks'=>70) ) );
$cursor $collection->find($where);

?>
2013-11-07 23:13:29
http://php5.kiev.ua/manual/ru/mongocollection.find.html
As the docs specify, '$or' conditions (and similar) get passed right on to MongoDB directly. It appears that to make a simple "field, $or, field" compound query work, all parts must be wrapped as a gigantic $and.
Here's how I got a find(), findOne(), and findAndModify() to obey such a compound $or for matching on fields, one of which is represented in data as either a string or integer:
<?php
  $query 

    array(
'$and' =>
      array(
        array(
'assessment_id' => $doc->assessment_id),
        array(
'$or' =>
          array(
            array(
'participant_id' => $doc->participant_id),
            array(
'participant_id' => (string)$doc->participant_id),
          ),
        ),
        array(
'measure_id' => $doc->measure_id)
      ),
    );
 
$thedoc $collection->findOne($query);
  return 
$thedoc;
?>
2015-03-02 22:30:12
http://php5.kiev.ua/manual/ru/mongocollection.find.html
example of sort and find

$client = new MongoDB\Client("mongodb://localhost:27017");
$product = $client->db->product;
$filter = [];
$options = ['sort' => ['catid' => 1], 'limit' => 10];
$list = $product->find($filter, $options);
2016-07-30 12:22:32
http://php5.kiev.ua/manual/ru/mongocollection.find.html

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