phalcon/cphalcon — pull request #1518 by dreamsxin (2013-11-05 02:34:49+00:00)
Title: Add method \Phalcon\Mvc\Model::selectWriteConnection

```php
class Robots extends Phalcon\Mvc\Model
{
/**
* Dynamically selects a shard
*
* @param array $intermediate
* @param array $bindParams
* @param array $bindTypes
*/
public function selectWriteConnection($intermediate, $bindParams, $bindTypes)
{
//Check if there is a 'where' clause in the select
if (isset($intermediate['where'])) {

$conditions = $intermediate['where'];

//Choose the possible shard according to the conditions
if ($conditions['left']['name'] == 'id') {
$id = $conditions['right']['value'];
if ($id > 0 && $id < 10000) {
return $this->getDI()->get('dbShard1');
}
if ($id > 10000) {
return $this->getDI()->get('dbShard2');
}
}
}

//Use a default shard
return $this->getDI()->get('dbShard0');
}

}
```