diff --git a/build/api/core/Checker.php b/build/api/core/Checker.php
index 47ca7c2..1c49345 100755
--- a/build/api/core/Checker.php
+++ b/build/api/core/Checker.php
@@ -106,7 +106,7 @@
 					break;
 
 				case 'alphanumeric':
-					return $checker && is_string($value) && preg_match('/^[\w\.-]+$/ui', $value);
+					return $checker && is_string($value) && preg_match('/^[\w\. -]+$/ui', $value);
 					break;
 
 				case 'letters':
diff --git a/build/api/module/professor/filterController.php b/build/api/module/professor/filterController.php
index 20c5526..3fa8235 100644
--- a/build/api/module/professor/filterController.php
+++ b/build/api/module/professor/filterController.php
@@ -77,28 +77,28 @@ class filterController{
 
 		/* (3) Filter by ue
 		---------------------------------------------------------*/
-		// if( !is_null($ues) ){
+		if( !is_null($ues) ){
 
-		// 	/** @var ue $ue_repo */
-		// 	$ue_repo = Repo::getRepo('ue');
+			/** @var ue $ue_repo */
+			$ue_repo = Repo::getRepo('ue');
 
-		// 	/* (1) For each ue -> get request */
-		// 	foreach($ues as $ue_code){
+			/* (1) For each ue -> get request */
+			foreach($ues as $ue_code){
 
-		// 		// 1. Ignore if wrong format
-		// 		if( !is_numeric($ue_code) || intval($ue_code) !== $ue_code )
-		// 			continue;
+				// 1. Ignore if wrong format
+				if( !is_string($ue_code) || strlen($ue_code) < 1 )
+					continue;
 
-		// 		// 2. Get from repo
-		// 		$fetched_ids = $ue_repo->getProfessors($ue_code);
+				// 2. Get from repo
+				$fetched_ids = $ue_repo->getProfessors($ue_code);
 
-		// 		// 3. Add in unique set
-		// 		foreach($fetched_ids as $prof_id)
-		// 			$matches_uniq[ intval($prof_id) ] = null;
+				// 3. Add in unique set
+				foreach($fetched_ids as $prof_id)
+					$matches_uniq[ intval($prof_id) ] = null;
 
-		// 	}
+			}
 
-		// }
+		}
 
 
 
diff --git a/build/database/repo/ue.php b/build/database/repo/ue.php
index 8e89c6f..2c0f82c 100644
--- a/build/database/repo/ue.php
+++ b/build/database/repo/ue.php
@@ -188,4 +188,44 @@ class ue extends Repo_i {
 		return $fetched;
 
 	}
+
+
+	/* (7) Gets all professors who teaches a UE by code
+	*
+	* @code<String>							The UE code
+	*
+	* @return professors<array>				The professors' UID matching the @code of the UE
+	*
+	---------------------------------------------------------*/
+	public function getProfessors(String $code) : array{
+
+		/* (1) Prepare statement */
+		$st = $this->pdo->prepare("SELECT p.idProfesseur
+			FROM Professeur p, UE u
+			WHERE (
+				   p.idProfesseur IN ( SELECT p_cr.idProfesseur FROM Professeur p_cr, Cours c WHERE c.Professeur_idProfesseur = p_cr.idProfesseur AND c.UE_code = u.code )
+				OR p.idProfesseur IN ( SELECT p_td.idProfesseur FROM Professeur p_td, TD t WHERE t.Professeur_idProfesseur = p_td.idProfesseur    AND t.UE_code = u.code )
+				OR p.idProfesseur IN ( SELECT p_tp.idProfesseur FROM Professeur p_tp, TP t WHERE t.Professeur_idProfesseur = p_tp.idProfesseur    AND t.UE_code = u.code )
+			)
+			AND u.code = :ue_code;");
+
+		/* (2) Bind params and execute statement */
+		if( is_bool($st) ) return [];
+		$success = $st->execute([ ':ue_code' => $code ]);
+
+		/* (3) Manage error */
+		if( !$success )
+			return [];
+
+		/* (4) Get data */
+		$fetched = $st->fetchAll();
+
+		/* (5) Return [] on no result */
+		if( $fetched === false )
+			return [];
+
+		/* (6) Return data */
+		return $fetched;
+
+	}
 }
\ No newline at end of file
diff --git a/webpack/data/teacher.js b/webpack/data/teacher.js
index 4ee7bbf..2205720 100644
--- a/webpack/data/teacher.js
+++ b/webpack/data/teacher.js
@@ -69,7 +69,7 @@ gstore.add('filter_handler', function(){
 			element.remClass('filter-hidden');
 
 			// 3.2. Only hide if does not match filter
-			if( rs.professors.indexOf(local_ptr[e].idProfesseur) <= -1 )
+			if( rs.matches.indexOf(local_ptr[e].idProfesseur) <= -1 )
 				element.addClass('filter-hidden');
 
 		}