public function pushEach($fieldName, array $values)
{
// value must be list, not dictionary
$values = array_values($values);
// prepasre to store
$values = Structure::prepareToStore($values);
// no $push operator found
if (!isset($this->operators['$push'])) {
$this->operators['$push'] = array();
}
// no field name found
if (!isset($this->operators['$push'][$fieldName])) {
$this->operators['$push'][$fieldName] = array('$each' => $values);
} else {
if (!is_array($this->operators['$push'][$fieldName]) || !isset($this->operators['$push'][$fieldName]['$each'])) {
$oldValue = $this->operators['$push'][$fieldName];
$this->operators['$push'][$fieldName] = array('$each' => array_merge(array($oldValue), $values));
} else {
$this->operators['$push'][$fieldName]['$each'] = array_merge($this->operators['$push'][$fieldName]['$each'], $values);
}
}
return $this;
}
