Add migration for the new published meta field

core/db.py

@@ -2,12 +2,14 @@ from enum import Enum
 from enum import unique
 from typing import Any
 from typing import Dict
+from typing import Iterable
 from typing import Optional
 
 from config import DB
 
 _Q = Dict[str, Any]
-_Doc = Optional[Dict[str, Any]]
+_D = Dict[str, Any]
+_Doc = Optional[_D]
 
 
 @unique
@@ -20,6 +22,10 @@ def find_one_activity(q: _Q) -> _Doc:
     return DB[CollectionName.ACTIVITIES.value].find_one(q)
 
 
+def find_activities(q: _Q) -> Iterable[_D]:
+    return DB[CollectionName.ACTIVITIES.value].find(q)
+
+
 def update_one_activity(q: _Q, update: _Q) -> None:
     DB[CollectionName.ACTIVITIES.value].update_one(q, update)