Operator "NOT LIKE" not work correctly - symfony

Question

i am creating a new query in my app.
I use filters, with different options (Contain, equal or different).
If I use operator "different", my query generate like this:
SELECT p FROM ProductosBundle:Producto p
LEFT JOIN p.tipo t
LEFT JOIN p.departamento d
WHERE 1=1 AND t.nombre NOT LIKE '%articulo%'
I have product different from "articulo", but return 0 results...
I tried with NOT LIKE, != and <>, but not return results.
Is there something wrong in my condition where? I do not see the problem, with contain and equal it works.
Any idea? Thanks
EDIT 1:
This is my controller:
...
$em = $this->get('doctrine.orm.entity_manager');
$dql = "SELECT p FROM ProductosBundle:Producto p LEFT JOIN p.tipo t LEFT JOIN p.departamento d";
if (isset($_GET['filterField']) && isset($_GET['filterValue'])){
$valores = explode(",",$_GET['filterValue']);
$filas = explode(",",$_GET['filterField']);
$operadores = explode(",",$_GET['filterOperator']);
$dql .= " WHERE 1=1";
for($i = 0; $i < count($valores); $i++){
$dql.= " AND ". $filas[$i]. " " . $operadores[$i] ;
if($operadores[$i] == "LIKE" OR $operadores[$i] == "NOT LIKE"){
$dql .= " '%".$valores[$i]."%'";
}else{
$dql .= " '".$valores[$i]."'";
}
}
}
$query = $em->createQuery($dql);
$paginator = $this->get('knp_paginator');
$productos = $paginator->paginate(
$query,
$request->query->get('page', 1),
25
);
EDIT2:
My profiler is executing this:
SELECT DISTINCT p0_.id AS id_0
FROM producto p0_
LEFT JOIN tipo t1_ ON p0_.tipo = t1_.id
LEFT JOIN departamento d2_ ON p0_.departamento = d2_.id
WHERE t1_.nombre LIKE 'articulo'
AND 1 = 1
AND t1_.nombre NOT LIKE '%articulo%'
LIMIT 25 OFFSET 0
Its a LIKE 'Articulo'... WHY???!!!

Answer 1

Presumably, there's an error in your UI logic / the code setting the query parameters. This:
$valores = explode(",",$_GET['filterValue']);
$filas = explode(",",$_GET['filterField']);
$operadores = explode(",",$_GET['filterOperator']);
generates both
t1_.nombre LIKE 'articulo'
and
t1_.nombre NOT LIKE '%articulo%'
so you should take a look at the code that populates filterValue, filterField and filterOperator.