fix bug: add friend need update both request

pkg/common/constant/constant.go

@@ -291,8 +291,9 @@ const (
 	GroupResponseAgree  = 1
 	GroupResponseRefuse = -1
 
-	FriendResponseAgree  = 1
-	FriendResponseRefuse = -1
+	FriendResponseNotHandle = 0
+	FriendResponseAgree     = 1
+	FriendResponseRefuse    = -1
 
 	Male   = 1
 	Female = 2

pkg/common/db/controller/friend.go

@@ -238,7 +238,7 @@ func (f *friendDatabase) AgreeFriendRequest(
 		}
 
 		fr2, err := f.friendRequest.NewTx(tx).Take(ctx, friendRequest.ToUserID, friendRequest.FromUserID)
-		if err == nil {
+		if err == nil && fr2.HandleResult == constant.FriendResponseNotHandle {
 			fr2.HandlerUserID = mcontext.GetOpUserID(ctx)
 			fr2.HandleResult = constant.FriendResponseAgree
 			fr2.HandleTime = now