update 群组成员数量

internal/logic/domain/group/repo/group_repo.go

@@ -28,7 +28,13 @@ func (*groupRepo) Get(groupId int64) (*model.Group, error) {
 		return nil, err
 	}
 	group.Members = members
-
+	if group.UserNum != int32(len(group.Members)) {
+		group.UserNum = int32(len(group.Members))
+		err = GroupRepo.Save(group)
+		if err != nil {
+			return nil, err
+		}
+	}
 	err = GroupCache.Set(group)
 	if err != nil {
 		return nil, err