How to write a find query with condition in php-mongodb? - php

Question

I'm having problem with find query in php-monogodb. find() without conditions works fine but when using condition inside find() method it won't give any results. How to solve this issue?
$connection = new Mongo();
$db = $connection->selectDB('db1');
$collection = $db->selectCollection('customers');
$cursor = $collection->find(array('CUSTOMER_ID' => $id));
$num_docs = $cursor->count();
if($num_docs > 0)
{
foreach($cursor as $obj)
{
echo 'Customer-Id: '.$obj['CUSTOMER_ID']."\n";
echo 'Customer Name: '.$obj['CUST_FIRST_NAME']." ".$obj['CUST_LAST_NAME']."\n";
echo 'Customer Email: '.$obj['CUST_EMAIL']."\n";
echo "\n\n\n";
}
}
After var_dump($cursor->explain()); it prints:
array (size=3)
'queryPlanner' =>
array (size=6)
'plannerVersion' => int 1
'namespace' => string 'db1.customers' (length=13)
'indexFilterSet' => boolean false
'parsedQuery' =>
array (size=1)
'CUSTOMER_ID' =>
array (size=1)
...
'winningPlan' =>
array (size=3)
'stage' => string 'COLLSCAN' (length=8)
'filter' =>
array (size=1)
...
'direction' => string 'forward' (length=7)
'rejectedPlans' =>
array (size=0)
empty
'executionStats' =>
array (size=7)
'executionSuccess' => boolean true
'nReturned' => int 0
'executionTimeMillis' => int 1
'totalKeysExamined' => int 0
'totalDocsExamined' => int 325
'executionStages' =>
array (size=14)
'stage' => string 'COLLSCAN' (length=8)
'filter' =>
array (size=1)
...
'nReturned' => int 0
'executionTimeMillisEstimate' => int 0
'works' => int 327
'advanced' => int 0
'needTime' => int 326
'needYield' => int 0
'saveState' => int 2
'restoreState' => int 2
'isEOF' => int 1
'invalidates' => int 0
'direction' => string 'forward' (length=7)
'docsExamined' => int 325
'allPlansExecution' =>
array (size=0)
empty
'serverInfo' =>
array (size=4)
'host' => string 'deadpool' (length=8)
'port' => int 27017
'version' => string '3.2.4' (length=5)
'gitVersion' => string 'e2ee9ffcf9f5a94fad76802e28cc978718bb7a30' (length=40)
Can you explain what is going wrong?

Answer 1

$cursor = $collection->find(array('CUSTOMER_ID' => $id)); where are you getting the id value from.
and try not using id as sometimes it has issues finding the value esp if $id is used elsewhere.