Call stored procedure/function with PHP in Mongo DB sharded cluster

Question

I am using MongoDB 2.6 with two shard clusters config. I want to call a function dataStats() that I create and store in MongoDB. This is my PHP script:

$client = new Mongo();
$db = $client->mydata;

$db->system->js->save(array("_id"=>"dataStats", 
   "value"=>new MongoCode("function() { ... }")));

$db->execute("dataStats()");

This code gives me this error:

  'err' => 'Error: can\'t use sharded collection from db.eval',
  'code' => 16722

The reason is $db->execute method is using Mongo db.eval command which is not supported with sharded collections . Is there a workaround for this issue? How can we call a stored procedure in sharded MongoDB from PHP?

Answer 1

There's no workaround. db.eval doesn't work with sharded collections. You should avoid using it if at all possible, anyway.