Query へのリレーション変更

models.py

@@ -31,11 +31,11 @@ class Answer (Model):
 
     __timestamps__ = False
 
-    @property
+    @belongs_to ('query_id')
     def query_rel (
             self,
-    ) -> Query:
-        return self.belongs_to (Query)
+    ) -> type:
+        return Query
 
     @property
     def answered_flags (
@@ -90,11 +90,11 @@ class QueryAnswerHistory (Model):
 
     __timestamps__ = False
 
-    @property
+    @belongs_to ('query_id')
     def query_rel (
             self,
-    ) -> Query:
-        return self.belongs_to (Query)
+    ) -> type:
+        return Query
 
     @property
     def answer (