fixup! Add relations to the cache for polls too, add doc comment

Author: jmartinesp

crates/matrix-sdk/src/event_cache/mod.rs

@@ -774,6 +774,7 @@ impl RoomEventCacheInner {
         .await
     }
 
+    /// Appends events with relationships to others into the relations cache.
     fn append_relations(
         &self,
         mut cache: RwLockWriteGuard<'_, AllEventsCache>,
@@ -834,6 +835,34 @@ impl RoomEventCacheInner {
                             }
                         }
                     }
+                    Some(AnyMessageLikeEventContent::PollResponse(c)) => {
+                        cache
+                            .relations
+                            .entry(c.relates_to.event_id)
+                            .or_default()
+                            .insert(ev.event_id().to_owned());
+                    }
+                    Some(AnyMessageLikeEventContent::PollEnd(c)) => {
+                        cache
+                            .relations
+                            .entry(c.relates_to.event_id)
+                            .or_default()
+                            .insert(ev.event_id().to_owned());
+                    }
+                    Some(AnyMessageLikeEventContent::UnstablePollResponse(c)) => {
+                        cache
+                            .relations
+                            .entry(c.relates_to.event_id)
+                            .or_default()
+                            .insert(ev.event_id().to_owned());
+                    }
+                    Some(AnyMessageLikeEventContent::UnstablePollEnd(c)) => {
+                        cache
+                            .relations
+                            .entry(c.relates_to.event_id)
+                            .or_default()
+                            .insert(ev.event_id().to_owned());
+                    }
                     Some(AnyMessageLikeEventContent::Reaction(c)) => {
                         cache
                             .relations

crates/matrix-sdk/tests/integration/room/common.rs

@@ -14,9 +14,7 @@ use matrix_sdk_test::{
 use ruma::{
     event_id,
     events::{
-        room::{
-            member::MembershipState, message::RoomMessageEventContent,
-        },
+        room::{member::MembershipState, message::RoomMessageEventContent},
         AnyStateEvent, AnySyncStateEvent, AnyTimelineEvent, StateEventType,
     },
     room_id,