From 9872645d5ac63a927f44e84a4e2715499e5afe78 Mon Sep 17 00:00:00 2001
From: user1823 <92206575+user1823@users.noreply.github.com>
Date: Sat, 26 Apr 2025 07:35:38 +0530
Subject: [PATCH] Update sorting by R for FSRS 6 (#3949)

* Update sorting by R for FSRS 6

* Update sqlite.rs
---
 rslib/src/storage/sqlite.rs | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/rslib/src/storage/sqlite.rs b/rslib/src/storage/sqlite.rs
index e7057946d..fb7066caf 100644
--- a/rslib/src/storage/sqlite.rs
+++ b/rslib/src/storage/sqlite.rs
@@ -384,10 +384,8 @@ fn add_extract_fsrs_relative_retrievability(db: &Connection) -> rusqlite::Result
                             .max(0.0001);
 
                         return Ok(Some(
-                            // power should be the reciprocal of the value of DECAY in FSRS-rs,
-                            // which is currently -0.5
-                            -(current_retrievability.powi(-2) - 1.)
-                                / (desired_retrievability.powi(-2) - 1.),
+                            -(current_retrievability.powf(-1.0 / decay) - 1.)
+                                / (desired_retrievability.powf(-1.0 / decay) - 1.),
                         ));
                     }
                 }