fix model eventout with str

app/models/events.py

@@ -31,7 +31,7 @@ class Event(BaseModel):
 
 
 class EventOut(BaseModel):
-    id: ObjectIdField = None
+    id: str | None = None
     name: str
     place: str
     description: str
@@ -43,6 +43,23 @@ class EventOut(BaseModel):
     end_date: datetime | None = None
     tags: list[str] = []
 
+    @classmethod
+    def from_mongo(cls, event: Event) -> "EventOut":
+        return cls(
+            id=str(event.id) if event.id else None,
+            name=event.name,
+            place=event.place,
+            description=event.description,
+            imgUrl=event.imgUrl,
+            link=event.link,
+            ticket=event.ticket,
+            status=event.status,
+            start_date=event.start_date,
+            end_date=event.end_date,
+            tags=event.tags,
+        )
+
+
 class EventOutWithInterested(EventOut):
     interested: bool = False
     interested_count: int = 0