Update sorting by R for FSRS 6 (#3949)

user1823 · web-flow · commit 9872645d5ac6 · 2025-04-26T12:05:38.000+10:00
* Update sorting by R for FSRS 6

* Update sqlite.rs
diff --git 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.),
                         ));
                     }
                 }

Original file line number	Diff line number	Diff line change
`@@ -384,10 +384,8 @@ fn add_extract_fsrs_relative_retrievability(db: &Connection) -> rusqlite::Result`
`384`	`384`	`.max(0.0001);`
`385`	`385`
`386`	`386`	`return Ok(Some(`
`387`		`- // power should be the reciprocal of the value of DECAY in FSRS-rs,`
`388`		`- // which is currently -0.5`
`389`		`- -(current_retrievability.powi(-2) - 1.)`
`390`		`- / (desired_retrievability.powi(-2) - 1.),`
	`387`	`+ -(current_retrievability.powf(-1.0 / decay) - 1.)`
	`388`	`+ / (desired_retrievability.powf(-1.0 / decay) - 1.),`
`391`	`389`	`));`
`392`	`390`	`}`
`393`	`391`	`}`