diff --git a/accountant/api/models/scheduled_operations.py b/accountant/api/models/scheduled_operations.py
index 6109e16..2dfa700 100644
--- a/accountant/api/models/scheduled_operations.py
+++ b/accountant/api/models/scheduled_operations.py
@@ -48,24 +48,11 @@ class ScheduledOperation(db.Model):
         self.category = category
 
     @classmethod
-    def get_scheduled_operations_for_account(cls, session, account):
-        if isinstance(account, int) or isinstance(account, str):
-            account_id = account
-        else:
-            account_id = account.id
-
-        query = session.query(
+    def query(cls, session):
+        return session.query(
             cls
-        ).filter(
-            cls.account_id == account_id
         ).order_by(
             desc(cls.day),
             cls.value,
             cls.label,
         )
-
-        return query
-
-    @classmethod
-    def get(cls, session, id):
-        return session.query(cls).filter(cls.id == id).one()
diff --git a/accountant/api/views/scheduled_operations.py b/accountant/api/views/scheduled_operations.py
index 4c288a1..28f3990 100644
--- a/accountant/api/views/scheduled_operations.py
+++ b/accountant/api/views/scheduled_operations.py
@@ -66,8 +66,10 @@ class ScheduledOperationListResource(Resource):
         """
         kwargs = get_parser.parse_args()
 
-        return ScheduledOperation.get_scheduled_operations_for_account(
-            session, **kwargs
+        return ScheduledOperation.query(
+            session
+        ).filter(
+            ScheduledOperation.account_id == kwargs.account
         ).all()
 
     @session_aware
@@ -93,7 +95,11 @@ class ScheduledOperationResource(Resource):
         Get scheduled operation.
         """
         try:
-            return ScheduledOperation.get(session, scheduled_operation_id)
+            return ScheduledOperation.query(
+                session
+            ).filter(
+                ScheduledOperation.id == scheduled_operation_id
+            ).one()
         except NoResultFound:
             return None, 404
 
@@ -104,8 +110,11 @@ class ScheduledOperationResource(Resource):
         Delete a scheduled operation.
         """
         try:
-            scheduled_operation = ScheduledOperation.get(
-                session, scheduled_operation_id)
+            scheduled_operation = ScheduledOperation.query(
+                session
+            ).filter(
+                ScheduledOperation.id == scheduled_operation_id
+            ).one()
         except NoResultFound:
             return None, 404
 
@@ -125,8 +134,11 @@ class ScheduledOperationResource(Resource):
                 or kwargs.id == scheduled_operation_id)
 
         try:
-            scheduled_operation = ScheduledOperation.get(
-                session, scheduled_operation_id)
+            scheduled_operation = ScheduledOperation.query(
+                session
+            ).filter(
+                ScheduledOperation.id == scheduled_operation_id
+            ).one()
         except NoResultFound:
             return None, 404