DB: Otypování MOEnum

mo/db.py

@@ -55,12 +55,15 @@ class MOEnum(str, PythonEnum):
         return name
 
     @classmethod
-    def choices(enum):
+    def choices(enum) -> List[Tuple[str, str]]:
         out = []
         for item in enum:
             out.append((item.name, item.friendly_name()))
         return out
 
+    def friendly_name(self) -> str:
+        return str(self)
+
     @classmethod
     def coerce(enum, name):
         if isinstance(name, enum):