原则 2：查询结果作为关联数组

Question

In my Repository class I use the following code to query:

$query = $this->getEntityManager()->createQuery("
    SELECT s.term, COUNT(s.term) AS freq
    FROM App\Entities\SearchTerm s
    GROUP BY s.term
    ORDER BY s.term ASC
");

$result = $query->getResult();

The result I get is something like:

array (size=4)
  0 => 
    array (size=2)
      'term' => string '' (length=0)
      'freq' => string '1' (length=1)
  1 => 
    array (size=2)
      'term' => string 'foo' (length=3)
      'freq' => string '1' (length=1)
  2 => 
    array (size=2)
      'term' => string 'bar' (length=3)
      'freq' => string '2' (length=1)
  3 => 
    array (size=2)
      'term' => string 'baz' (length=3)
      'freq' => string '2' (length=1)

But I would rather have an associative array as a result:

array (size=4)
  '' => string '1' (length=1)
  'foo' => string '1' (length=1)
  'bar' => string '2' (length=1)
  'baz' => string '2' (length=1)

Is this possible without an extra for-loop to build the desired array?

Answer 1

I know its old but today I had to do almost the same, my solution without a custom hydrator

• INDEX BY s.term
• modify the getResult() to be sure

like

$result = $query->getQuery()->getResult(\Doctrine\ORM\AbstractQuery::HYDRATE_ARRAY);

• format the result

as

$resultNeeded = array_map(function($value) { return $value['freq']; }, $result);

Answer 2

If you want an array you can use the getArrayResult method .

Gets the array of results for the query.

Alias for execute(null, HYDRATE_ARRAY).

$result = $query->getQuery()->getArrayResult();

So using this method will give you the exact same result as using the constant HYDRATE_ARRAY .

Answer 3

Use INDEX BY :

$em = $this->getEntityManager();
$query = $em->createQuery('SELECT c FROM SomeBundle:Configuration c INDEX BY c.name');
$query->getResult(\Doctrine\ORM\Query::HYDRATE_ARRAY);

I saw it here and it works fine : https://coderwall.com/p/crz4dq/defining-a-column-to-be-the-key-of-the-result-hydrated-as-array-in-doctrine-2

Answer 4

Actually somewhere the transposition has to be done. See Hydration Modes about what is returned by ->getResult() and which alternatives modes/variants already exist.

You can also add your own hydration mode at a central place. That is explained in Custom Hydration Modes .

Answer 5

After lot of search I have found some solutions for doctrine object to array conversion . When we have associated objects in result.

1.

$person = $em->find('Person', 2);
$da = array();
        $person = (array) $person;
        foreach($person as $i=>$d) {
            if (is_object($d)) {
                $d = (array) $d;
                foreach($d as $si=>$sd){
                    if (is_object($sd)) {
                        //var_dump('after convert array');
                        $da[$i][$si] = (array) $sd ;
                         //var_dump($da[$i][$si]);
                    } else {
                       $da[$i][$si] = $sd ;
                       //var_dump($da[$i][$si] );
                    }
                }

            } else {
                $da[$i] = $d;
                //var_dump($da[$i]);
            }
        }

echo '<pre>'; print_r($da); echo '<pre>'; exit;

2.

$query = $em->createQuery('SELECT w FROM  Person w WHERE w.Id = 2');
$person = $query->getResult(\Doctrine\ORM\Query::HYDRATE_ARRAY);
echo '<pre>';  \Doctrine\Common\Util\Debug::dump($person); exit;

3.

 $result = $em->createQueryBuilder();
            $person = $result->select('p')
            ->from('PsnPersonPsn', 'p')
            ->where('p.Id= 1')
            ->getQuery()
            ->getResult(\Doctrine\ORM\Query::HYDRATE_ARRAY);
             echo '<pre>';  \Doctrine\Common\Util\Debug::dump($person); exit;