Doctrine DQL Extention not working in Zend Framework 2 - doctrine-orm

Question

I have just added a DQL extension into my ZF2 app but it is not working.
The extension should allow a match against query.
In my module.config.php I have
'doctrine' => array(
'driver' => array(
'Application_driver' => array(
'class' => 'Doctrine\ORM\Mapping\Driver\AnnotationDriver',
'cache' => 'array',
'paths' => array(__DIR__ . '/../src/Application/Entity')
),
'orm_default' => array(
'drivers' => array(
'Application\Entity' => 'Application_driver'
),
),
),
'configuration' => array(
'orm_default' => array(
'string_functions' => array(
'MatchAgainst' => 'Freedom\Doctrine\ORM\AST\Functions\MatchAgainstFunction',
),
'datetime_functions' => array(),
'numeric_functions' => array(),
'metadata_cache' => 'filesystem',
'query_cache' => 'filesystem',
'result_cache' => 'filesystem',
),
),
),
and in my DQL I have
$builder->andwhere('MATCH (`t.title`) AGAINST (:title)')
->setParameter('title', $param);
The extension is not even being executed all I get is an error.
Error: Expected known function, got 'MATCH'
Does anyone know what I am missing?
Many thanks in advance.
EDIT
I have got the extension working by changing the line from 'MatchAgainst' => 'Freedom\Doctrine\ORM\AST\Functions\MatchAgainstFunction', to 'Match' => 'Freedom\Doctrine\ORM\AST\Functions\MatchAgainstFunction',.
The problem I am having now is the DQL query is still not working.
My DQL extension looks like
namespace Freedom\Doctrine\ORM\AST\Functions;
use Doctrine\ORM\Query\AST\Functions\FunctionNode;
use Doctrine\ORM\Query\Lexer;
use Doctrine\ORM\Query\Parser;
use Doctrine\ORM\Query\SqlWalker;
/**
* MatchAgainstFunction ::=
* "MATCH" "(" StateFieldPathExpression {"," StateFieldPathExpression}* ")" "AGAINST" "("
* StringPrimary ["BOOLEAN"] ["EXPAND"] ")"
*/
class MatchAgainstFunction extends FunctionNode
{
/** #var array list of \Doctrine\ORM\Query\AST\PathExpression */
protected $pathExp = null;
/** #var string */
protected $against = null;
/** #var boolean */
protected $booleanMode = false;
/** #var boolean */
protected $queryExpansion = false;
public function parse(Parser $parser)
{
// match
$parser->match(Lexer::T_IDENTIFIER);
$parser->match(Lexer::T_OPEN_PARENTHESIS);
// first Path Expression is mandatory
$this->pathExp = array();
$this->pathExp[] = $parser->StateFieldPathExpression();
// Subsequent Path Expressions are optional
$lexer = $parser->getLexer();
while ($lexer->isNextToken(Lexer::T_COMMA)) {
$parser->match(Lexer::T_COMMA);
$this->pathExp[] = $parser->StateFieldPathExpression();
}
$parser->match(Lexer::T_CLOSE_PARENTHESIS);
// against
if (strtolower($lexer->lookahead['value']) !== 'against') {
$parser->syntaxError('against');
}
$parser->match(Lexer::T_IDENTIFIER);
$parser->match(Lexer::T_OPEN_PARENTHESIS);
$this->against = $parser->StringPrimary();
if (strtolower($lexer->lookahead['value']) === 'boolean') {
$parser->match(Lexer::T_IDENTIFIER);
$this->booleanMode = true;
}
if (strtolower($lexer->lookahead['value']) === 'expand') {
$parser->match(Lexer::T_IDENTIFIER);
$this->queryExpansion = true;
}
$parser->match(Lexer::T_CLOSE_PARENTHESIS);
}
public function getSql(SqlWalker $walker)
{
$fields = array();
foreach ($this->pathExp as $pathExp) {
$fields[] = $pathExp->dispatch($walker);
}
$against = $walker->walkStringPrimary($this->against)
. ($this->booleanMode ? ' IN BOOLEAN MODE' : '')
. ($this->queryExpansion ? ' WITH QUERY EXPANSION' : '');
return sprintf('MATCH (%s) AGAINST (%s)', implode(', ', $fields), $against);
}
}
and in my DQL I have
$builder->andWhere('MATCH (t.title) AGAINST (:title)')
->setParameter('title', $param);
Now I am getting the error
[Syntax Error] line 0, col 204: Error: Expected =, <, <=, <>, >, >=, !=, got 'ORDER'
Does anyone know why Doctrine is looking for a comparison operator?

Answer 1

I have got the extension working by changing the line from 'MatchAgainst' => 'Freedom\Doctrine\ORM\AST\Functions\MatchAgainstFunction', to 'Match' => 'Freedom\Doctrine\ORM\AST\Functions\MatchAgainstFunction',
In answer to my second question I found this works
$builder->andWhere('MATCH (t.title) AGAINST (:title BOOLEAN) > 0')
->setParameter('title', $param);