Doctrine ORM - how to map jsonb / yaml?

This is supported by doctrine/dbal v2.6+ (it requires PHP 7.1). All you need to do is use json_array and set options={"jsonb"=true} I tested this on doctrine/dbal v2.6.3

This is what it looks like in PHP format

/**
 * @ORM\Column(type="json_array",nullable=true,options={"jsonb"=true})
 */
private $details;

and it creates query such as (for existing talble):

ALTER TABLE mytable ADD details JSONB NOT NULL;

more details about type mapping can be found at Doctrine mapping matrix.