diff --git a/bin/mongodb/play21.js b/bin/mongodb/play21.js
index 29541381fb..fb8bdb7085 100644
--- a/bin/mongodb/play21.js
+++ b/bin/mongodb/play21.js
@@ -71,8 +71,6 @@ print('create relation collection');
 db.createCollection('relation')
 db.relation.ensureIndex({u1:1})
 db.relation.ensureIndex({u2:1})
-db.relation.ensureIndex({u1:1, f:1})
-db.relation.ensureIndex({u2:1, f:1})
 
 // print("Reset lobby_room");
 // db.lobby_room.drop();
diff --git a/modules/common/src/main/PimpedJson.scala b/modules/common/src/main/PimpedJson.scala
index af5e1b9460..30262ab450 100644
--- a/modules/common/src/main/PimpedJson.scala
+++ b/modules/common/src/main/PimpedJson.scala
@@ -17,6 +17,9 @@ trait PimpedJson {
     def long(key: String): Option[Long] =
       (js \ key).asOpt[Long]
 
+    def boolean(key: String): Option[Boolean] =
+      (js \ key).asOpt[Boolean]
+
     def obj(key: String): Option[JsObject] =
       (js \ key).asOpt[JsObject]
 
diff --git a/modules/relation/src/main/RelationRepo.scala b/modules/relation/src/main/RelationRepo.scala
index 79cfb4c300..d2b6892d6c 100644
--- a/modules/relation/src/main/RelationRepo.scala
+++ b/modules/relation/src/main/RelationRepo.scala
@@ -3,6 +3,7 @@ package lila.relation
 import lila.db.Implicits._
 import lila.db.api._
 import tube.relationTube
+import lila.common.PimpedJson._
 
 import play.api.libs.json._
 
@@ -19,11 +20,15 @@ private[relation] object RelationRepo {
   def blockers(userId: ID) = relaters(userId, Block)
   def blocking(userId: ID) = relating(userId, Block)
 
-  private def relaters(userId: ID, relation: Boolean): Fu[Set[ID]] =
-    $primitive(Json.obj("u2" -> userId, "r" -> relation), "u1")(_.asOpt[ID]) map (_.toSet)
+  private def relaters(userId: ID, relation: Relation): Fu[Set[ID]] =
+    $projection(Json.obj("u2" -> userId), Seq("u1", "f")) { obj ⇒
+      obj str "u1" map { _ -> ~(obj boolean "f") }
+    } map (_.filter(_._2 == relation).map(_._1).toSet)
 
-  private def relating(userId: ID, relation: Boolean): Fu[Set[ID]] =
-    $primitive(Json.obj("u1" -> userId, "r" -> relation), "u2")(_.asOpt[ID]) map (_.toSet)
+  private def relating(userId: ID, relation: Relation): Fu[Set[ID]] =
+    $projection(Json.obj("u1" -> userId), Seq("u2", "f")) { obj ⇒
+      obj str "u2" map { _ -> ~(obj boolean "f") }
+    } map (_.filter(_._2 == relation).map(_._1).toSet)
 
   def follow(u1: ID, u2: ID): Funit = save(u1, u2, Follow)
   def unfollow(u1: ID, u2: ID): Funit = remove(u1, u2)