/**
* Calculates the DB updates to be performed to update data from $old to
* $new.
*
* @param array $old
* @param array $new
* @return array
* @throws DataModelException
*/
public function calcUpdates(array $old, array $new)
{
$changeSet = ObjectManager::calcUpdatesWithoutValidation($old, $new);
foreach ($this->obsoleteUpdateColumns as $val) {
// Need to use array_key_exists to check null value
if (array_key_exists($val, $changeSet)) {
unset($changeSet[$val]);
}
}
if (is_array($this->allowedUpdateColumns)) {
$extra = array_diff(array_keys($changeSet), $this->allowedUpdateColumns);
if ($extra) {
throw new DataModelException('Update not allowed on: ' . implode(', ', $extra), 'process-data');
}
}
return $changeSet;
}
/**
* Gets the required updates. Any changes to External Store will be reflected in
* the returned array.
*
* @param array $old Associative array mapping prior columns to old values
* @param array $new Associative array mapping updated columns to new values
*
* @return array Validated change set as associative array, mapping columns to
* change to their new values
*/
public function calcUpdates(array $old, array $new)
{
// First, see if there are any changes to content at all.
// If not, processExternalStore will know not to insert a useless row for
// unchanged content (if updating content is allowed).
$unvalidatedChangeset = ObjectManager::calcUpdatesWithoutValidation($old, $new);
// We check here so if it's not allowed, we don't insert a wasted External
// Store entry, then throw an exception in the parent calcUpdates.
if ($this->isUpdatingExistingRevisionContentAllowed()) {
$unvalidatedChangeset = $this->processExternalStore($unvalidatedChangeset);
}
// The parent calcUpdates does the validation that we're not changing a non-allowed
// field, regardless of whether explicitly passed in, or done by processExternalStore.
$validatedChangeset = parent::calcUpdates(array(), $unvalidatedChangeset);
return $validatedChangeset;
}