diff --git a/project/src/model/gateways/InviteGateway.php b/project/src/model/gateways/InviteGateway.php
index d0ddc0c..af67014 100755
--- a/project/src/model/gateways/InviteGateway.php
+++ b/project/src/model/gateways/InviteGateway.php
@@ -61,4 +61,8 @@ class InviteGateway extends JoueurGateway
             return $id;
         }
     }
+
+    public function supprimerInvite(int $id) : bool {
+
+    }
 }
\ No newline at end of file
diff --git a/project/src/model/gateways/ScientifiqueGateway.php b/project/src/model/gateways/ScientifiqueGateway.php
index 7b54e1d..c2cd33a 100755
--- a/project/src/model/gateways/ScientifiqueGateway.php
+++ b/project/src/model/gateways/ScientifiqueGateway.php
@@ -12,6 +12,10 @@ class ScientifiqueGateway
         $this->con = $con;
     }
 
+    public function getFromId(int $id) : array {
+
+    }
+
 //    public function getRandom(): array|bool{ <- autorisé seulement en PHP 8
 //        $this->con->executeQuery(
 //            "SELECT id, nom, prenom, photo, dateNaissance, descriptif, ratiotrouvee, idthematique, iddifficulte, index FROM Scientifique ORDER BY RANDOM() LIMIT 1;");
@@ -29,6 +33,10 @@ class ScientifiqueGateway
         return $this->con->getOneResult();
     }
 
+    public function getRandomFromDifficulte(Difficulte $difficulte) : array {
+
+    }
+
     /**
      * @throws Exception
      */
diff --git a/project/src/model/gateways/SexeGateway.php b/project/src/model/gateways/SexeGateway.php
index 6902a5f..0310dab 100755
--- a/project/src/model/gateways/SexeGateway.php
+++ b/project/src/model/gateways/SexeGateway.php
@@ -22,4 +22,8 @@ class SexeGateway
         $this->con->executeQuery("SELECT id, libelle FROM Sexe;");
         return $this->con->getResults();
     }
+
+    public function getFromScientifique(int $idScientifique) : array {
+
+    }
 }
\ No newline at end of file
diff --git a/project/src/model/gateways/ThematiqueGateway.php b/project/src/model/gateways/ThematiqueGateway.php
index 5220c69..861983f 100755
--- a/project/src/model/gateways/ThematiqueGateway.php
+++ b/project/src/model/gateways/ThematiqueGateway.php
@@ -21,4 +21,8 @@ class ThematiqueGateway
         $this->con->executeQuery("SELECT id, libelle FROM Thematique;");
         return $this->con->getResults();
     }
+
+    public function getFromScientifique(int $idScientifique) : array {
+
+    }
 }
\ No newline at end of file