Orm: DDC-2190: findBy() support finding by a single DateTime but not by multiple DateTime

[doctrinebot]

Jira issue originally created by user stof:

The following code works:

$repository->findBy(array('date' => new \DateTime()))

but the following code fails as it does not apply the conversion of the date type for each element:

$repository->findBy(array('date' => array(new \DateTime(), new \DateTime('tomorrow')))

[doctrinebot]

Comment created by @beberlei:

This is actually very hard to implement, the problem is that we only have ARRAY constants for PDO::PARAM_INT and PDO::PARAM_STR - all the other types would require special handling.

[doctrinebot]

Comment created by @beberlei:

Attaching failing testcase.

The idea is to have something like "datetime[]" as type and detect this in the SQLParserUtils of DBAL.

Another approach would be to convert the values in the ORM already, before passing to the DBAL.

[kalifg]

We are running into this a lot now that we are starting to use the ramsey uuid_binary_ordered_time type for our PK.

[Ocramius]

This cannot work due to lack of expressiveness in the DBAL type system, which is not capable of representing nested custom types