how to return an array of objects in zend framewor

问题:

I am doing a query in zf2 and i get back a object(Zend\Db\ResultSet\HydratingResultSet) that i have to a foreach on, in order to get to the properties.

I would like to get an array of objects by default.

here is some code i have:

factory

'address-mapper'  => function ($serviceManager) {
    $mapper = new Mapper\Address();
    $mapper->setDbAdapter($serviceManager->get('Zend\Db\Adapter\Adapter'));
    $mapper->setEntityPrototype(new Entity\Address);
    $mapper->setHydrator(new \Zend\Stdlib\Hydrator\ClassMethods);

    return $mapper;
}

the query

public function fetchById()
{
    $select = $this->getSelect()->where(array('id' => $Id));
    return $this->select($select);
}

this gives me back:

object(Zend\Db\ResultSet\HydratingResultSet)[459]
      protected 'hydrator' => 
        object(Zend\Stdlib\Hydrator\ClassMethods)[415]
          protected 'underscoreSeparatedKeys' => boolean true
          private 'callableMethodFilter' => 
          ....
          ....

any ideas what i need to do?

回答1:

The Zend\Db\ResultSet\HydratingResultSet has a toArray method. So you can do this to get a multi-dimension array of the results instead of a result set:

public function fetchById()
{
    $select = $this->getSelect()->where(array('id' => $Id));
    $arrayResults = $this->select($select)->toArray()
    return $arrayResults;
}

回答2:

As pointed out by Steve, you can iterate the result set like an array. But if you need it as an actual array, ZF2 provides as iteratorToArray function that will convert it to an array for you.

public function fetchById($Id) {
    $select = $this->getSelect()->where(array('id' => $Id));
    $results = $this->select($select);

    return \Zend\Stdlib\ArrayUtils::iteratorToArray($results);
}