[update] attachement on document

models/acc_contract.py

@@ -26,7 +26,7 @@ class AccContract(models.Model):
     )
     start_date = fields.Date("Début du contrat")
     end_date = fields.Date("Fin du contrat")
-    document = fields.Binary("Document attaché", required=True)
+    document = fields.Binary("Document attaché", required=True, attachment=True)
     name = fields.Char("Nom du document")
     # ------------------------------------------------------
     # SQL Constraints