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I rewrote for Drupal 8 a Drupal 6 query on 3 custom entities (see here):

$database = \Drupal::database();
$query = $database->select('amap_distributions_dates', 'amdd');
$query->leftJoin('amap_distributions_inscriptions', 'amdi', 'amdi.datedistributionid = amdd.id');
$query->leftJoin('association_personne', 'ap', 'ap.id = amdi.amapienid');
$query->fields('amdd', ['id', 'datedistribution', 'nombreproduits'])
    ->fields('amdi', ['id', 'datedistributionid', 'amapienid', 'role'])
    ->fields('ap', ['id', 'nom', 'prenom'])
    ->condition('nombreproduits', 0, '>')
    ->orderBy('datedistribution', 'ASC')
    ->orderBy('role', 'ASC')
    ->orderBy('nom', 'ASC')
    ->orderBy('prenom', 'ASC');
$results = $query->execute()->fetchAllAssoc('id');
foreach ($results as $row) { some code here }

Unfortunately, I can retrieve only the last of each {datedistribution-role-nom}.
For each 'datedistribution', if I have more than one 'role' or 'name', I can get only the last one considering the sort order I put in place.
Strange, no?
Any idea why?

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    Don't use fetchAllAssoc(). Just $result = $query->execute() and then loop over that.
    – Berdir
    Commented Jul 2, 2016 at 8:59
  • You should consider loading the entire entity objects using entityQuery and loadMultiple.
    – Eyal
    Commented Jul 3, 2016 at 16:24
  • @Berdir Do you know why I can't accept your comment as an 'answer' to my question?
    – gbmapo
    Commented Jul 4, 2016 at 10:17

1 Answer 1

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Don't use fetchAllAssoc(). Just $result = $query->execute() and then loop over that

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