From 9c25e6d2738f8095a3c99fb6f0fedcc401d1e8ed Mon Sep 17 00:00:00 2001
From: Zixuan Chen <remch183@outlook.com>
Date: Sat, 10 Feb 2024 22:19:52 +0800
Subject: [PATCH] fix: should not reset the state when calling checkout to
 latest (#265)

---
 crates/loro-internal/src/loro.rs   |  7 +++++++
 crates/loro-internal/tests/test.rs | 12 ++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/crates/loro-internal/src/loro.rs b/crates/loro-internal/src/loro.rs
index d7ab3217..14a36eb0 100644
--- a/crates/loro-internal/src/loro.rs
+++ b/crates/loro-internal/src/loro.rs
@@ -260,6 +260,8 @@ impl LoroDoc {
         immediate_renew: bool,
     ) {
         if !self.auto_commit.load(Acquire) {
+            // if not auto_commit, nothing should happen
+            // because the global txn is not used
             return;
         }
 
@@ -660,6 +662,11 @@ impl LoroDoc {
     }
 
     pub fn checkout_to_latest(&self) {
+        if !self.is_detached() {
+            self.commit_then_renew();
+            return;
+        }
+
         debug_log::debug_log!("Attached {}", self.peer_id());
         let f = self.oplog_frontiers();
         self.checkout(&f).unwrap();
diff --git a/crates/loro-internal/tests/test.rs b/crates/loro-internal/tests/test.rs
index a9d3c23f..68168f4a 100644
--- a/crates/loro-internal/tests/test.rs
+++ b/crates/loro-internal/tests/test.rs
@@ -8,6 +8,18 @@ use loro_internal::{
 };
 use serde_json::json;
 
+#[test]
+fn issue_502() -> LoroResult<()> {
+    let doc = LoroDoc::new_auto_commit();
+    doc.get_map("map").insert("stringA", "Original data")?;
+    doc.commit_then_renew();
+    doc.get_map("map").insert("stringA", "Updated data")?;
+    doc.attach();
+    doc.get_map("map").insert("stringB", "Something else")?;
+    doc.commit_then_renew();
+    Ok(())
+}
+
 #[test]
 fn issue_225() -> LoroResult<()> {
     let doc = LoroDoc::new_auto_commit();