Indexing fails when for docs with unpub_date or pub_date set when using ElasticSearch

[isaacniebeling]

What it says on the tin... If there's an unpub_date set, it fails with:

PHP Fatal error: Uncaught exception 'Elastica\Exception\ResponseException' with message 'failed to parse [unpub_date]' in /core/components/simplesearch/model/simplesearch/driver/libs/Elastica/Transport/Http.php:171

I tried adding pub_date and unpub_date to the $dateFields array, but that cause indexing to fail when there was no pub/unpub_date set (with the same message). I've temporarily just unset($fields['unpub_date'], $fields['pub_date']) before the $fields loop, but I'm not sure that's the best way to handle things. @theboxer What do you think?

[theboxer]

I've added pub_date and unpub_date to $dateFields and indexing works fine...

[theboxer]

@isaacniebeling did you had a chance to try it again?