diff --git a/frontend/rust-lib/flowy-folder/src/manager.rs b/frontend/rust-lib/flowy-folder/src/manager.rs
index 05847f8cc1..fe9a160b39 100644
--- a/frontend/rust-lib/flowy-folder/src/manager.rs
+++ b/frontend/rust-lib/flowy-folder/src/manager.rs
@@ -4,7 +4,7 @@ use crate::{
     errors::FlowyResult,
     event_map::{FolderCouldServiceV1, WorkspaceDatabase, WorkspaceUser},
     services::{
-        folder_editor::ClientFolderEditor, persistence::FolderPersistence, set_current_workspace, AppController,
+        folder_editor::FolderEditor, persistence::FolderPersistence, set_current_workspace, AppController,
         TrashController, ViewController, WorkspaceController,
     },
 };
@@ -61,7 +61,7 @@ pub struct FolderManager {
     pub(crate) view_controller: Arc<ViewController>,
     pub(crate) trash_controller: Arc<TrashController>,
     web_socket: Arc<dyn RevisionWebSocket>,
-    folder_editor: Arc<TokioRwLock<Option<Arc<ClientFolderEditor>>>>,
+    folder_editor: Arc<TokioRwLock<Option<Arc<FolderEditor>>>>,
     data_processors: ViewDataProcessorMap,
 }
 
@@ -166,8 +166,7 @@ impl FolderManager {
         let rev_persistence = Arc::new(RevisionPersistence::new(user_id, folder_id.as_ref(), disk_cache));
         let rev_manager = RevisionManager::new(user_id, folder_id.as_ref(), rev_persistence);
 
-        let folder_editor =
-            ClientFolderEditor::new(user_id, &folder_id, token, rev_manager, self.web_socket.clone()).await?;
+        let folder_editor = FolderEditor::new(user_id, &folder_id, token, rev_manager, self.web_socket.clone()).await?;
         *self.folder_editor.write().await = Some(Arc::new(folder_editor));
 
         let _ = self.app_controller.initialize()?;
@@ -228,7 +227,7 @@ impl DefaultFolderBuilder {
 
 #[cfg(feature = "flowy_unit_test")]
 impl FolderManager {
-    pub async fn folder_editor(&self) -> Arc<ClientFolderEditor> {
+    pub async fn folder_editor(&self) -> Arc<FolderEditor> {
         self.folder_editor.read().await.clone().unwrap()
     }
 }
diff --git a/frontend/rust-lib/flowy-folder/src/services/app/event_handler.rs b/frontend/rust-lib/flowy-folder/src/services/app/event_handler.rs
index 45034646b0..b95b91dc2e 100644
--- a/frontend/rust-lib/flowy-folder/src/services/app/event_handler.rs
+++ b/frontend/rust-lib/flowy-folder/src/services/app/event_handler.rs
@@ -46,7 +46,7 @@ pub(crate) async fn update_app_handler(
     Ok(())
 }
 
-#[tracing::instrument(level = "debug", skip(data, app_controller, view_controller))]
+#[tracing::instrument(level = "trace", skip(data, app_controller, view_controller))]
 pub(crate) async fn read_app_handler(
     data: Data<AppId>,
     app_controller: AppData<Arc<AppController>>,
diff --git a/frontend/rust-lib/flowy-folder/src/services/folder_editor.rs b/frontend/rust-lib/flowy-folder/src/services/folder_editor.rs
index 6ea1a7e2ec..ef94c1d316 100644
--- a/frontend/rust-lib/flowy-folder/src/services/folder_editor.rs
+++ b/frontend/rust-lib/flowy-folder/src/services/folder_editor.rs
@@ -17,7 +17,7 @@ use lib_ot::core::PlainTextAttributes;
 use parking_lot::RwLock;
 use std::sync::Arc;
 
-pub struct ClientFolderEditor {
+pub struct FolderEditor {
     user_id: String,
     #[allow(dead_code)]
     pub(crate) folder_id: FolderId,
@@ -27,7 +27,7 @@ pub struct ClientFolderEditor {
     ws_manager: Arc<flowy_revision::RevisionWebSocketManager>,
 }
 
-impl ClientFolderEditor {
+impl FolderEditor {
     #[allow(unused_variables)]
     pub async fn new(
         user_id: &str,
@@ -129,7 +129,7 @@ impl RevisionCloudService for FolderRevisionCloudService {
 }
 
 #[cfg(feature = "flowy_unit_test")]
-impl ClientFolderEditor {
+impl FolderEditor {
     pub fn rev_manager(&self) -> Arc<RevisionManager> {
         self.rev_manager.clone()
     }
diff --git a/frontend/rust-lib/flowy-folder/src/services/persistence/mod.rs b/frontend/rust-lib/flowy-folder/src/services/persistence/mod.rs
index b272168e33..d5bbb3a277 100644
--- a/frontend/rust-lib/flowy-folder/src/services/persistence/mod.rs
+++ b/frontend/rust-lib/flowy-folder/src/services/persistence/mod.rs
@@ -5,7 +5,7 @@ mod version_2;
 use crate::{
     event_map::WorkspaceDatabase,
     manager::FolderId,
-    services::{folder_editor::ClientFolderEditor, persistence::migration::FolderMigration},
+    services::{folder_editor::FolderEditor, persistence::migration::FolderMigration},
 };
 use flowy_database::ConnectionPool;
 use flowy_error::{FlowyError, FlowyResult};
@@ -50,14 +50,11 @@ pub trait FolderPersistenceTransaction {
 
 pub struct FolderPersistence {
     database: Arc<dyn WorkspaceDatabase>,
-    folder_editor: Arc<RwLock<Option<Arc<ClientFolderEditor>>>>,
+    folder_editor: Arc<RwLock<Option<Arc<FolderEditor>>>>,
 }
 
 impl FolderPersistence {
-    pub fn new(
-        database: Arc<dyn WorkspaceDatabase>,
-        folder_editor: Arc<RwLock<Option<Arc<ClientFolderEditor>>>>,
-    ) -> Self {
+    pub fn new(database: Arc<dyn WorkspaceDatabase>, folder_editor: Arc<RwLock<Option<Arc<FolderEditor>>>>) -> Self {
         Self {
             database,
             folder_editor,
diff --git a/frontend/rust-lib/flowy-folder/src/services/persistence/version_2/v2_impl.rs b/frontend/rust-lib/flowy-folder/src/services/persistence/version_2/v2_impl.rs
index 8dafda3c93..40f72e10b0 100644
--- a/frontend/rust-lib/flowy-folder/src/services/persistence/version_2/v2_impl.rs
+++ b/frontend/rust-lib/flowy-folder/src/services/persistence/version_2/v2_impl.rs
@@ -1,5 +1,5 @@
 use crate::services::{
-    folder_editor::ClientFolderEditor,
+    folder_editor::FolderEditor,
     persistence::{AppChangeset, FolderPersistenceTransaction, ViewChangeset, WorkspaceChangeset},
 };
 use flowy_error::{FlowyError, FlowyResult};
@@ -11,7 +11,7 @@ use flowy_folder_data_model::entities::{
 };
 use std::sync::Arc;
 
-impl FolderPersistenceTransaction for ClientFolderEditor {
+impl FolderPersistenceTransaction for FolderEditor {
     fn create_workspace(&self, _user_id: &str, workspace: Workspace) -> FlowyResult<()> {
         if let Some(change) = self.folder.write().create_workspace(workspace)? {
             let _ = self.apply_change(change)?;
diff --git a/frontend/rust-lib/flowy-folder/src/services/view/controller.rs b/frontend/rust-lib/flowy-folder/src/services/view/controller.rs
index 603b76ec2c..ae88073afc 100644
--- a/frontend/rust-lib/flowy-folder/src/services/view/controller.rs
+++ b/frontend/rust-lib/flowy-folder/src/services/view/controller.rs
@@ -129,7 +129,7 @@ impl ViewController {
             .await
     }
 
-    #[tracing::instrument(level = "debug", skip(self), err)]
+    #[tracing::instrument(level = "trace", skip(self), err)]
     pub(crate) fn set_latest_view(&self, view_id: &str) -> Result<(), FlowyError> {
         KV::set_str(LATEST_VIEW_ID, view_id.to_owned());
         Ok(())
@@ -193,7 +193,7 @@ impl ViewController {
     }
 
     // belong_to_id will be the app_id or view_id.
-    #[tracing::instrument(level = "debug", skip(self), err)]
+    #[tracing::instrument(level = "trace", skip(self), err)]
     pub(crate) async fn read_views_belong_to(&self, belong_to_id: &str) -> Result<RepeatedView, FlowyError> {
         self.persistence
             .begin_transaction(|transaction| {
diff --git a/frontend/rust-lib/flowy-folder/tests/workspace/script.rs b/frontend/rust-lib/flowy-folder/tests/workspace/script.rs
index a6fd1fbe29..39f023ca7d 100644
--- a/frontend/rust-lib/flowy-folder/tests/workspace/script.rs
+++ b/frontend/rust-lib/flowy-folder/tests/workspace/script.rs
@@ -1,5 +1,5 @@
 use flowy_folder::event_map::FolderEvent::*;
-use flowy_folder::{errors::ErrorCode, services::folder_editor::ClientFolderEditor};
+use flowy_folder::{errors::ErrorCode, services::folder_editor::FolderEditor};
 use flowy_folder_data_model::entities::view::{RepeatedViewId, ViewId};
 use flowy_folder_data_model::entities::workspace::WorkspaceId;
 use flowy_folder_data_model::entities::{
@@ -125,7 +125,7 @@ impl FolderTest {
 
     pub async fn run_script(&mut self, script: FolderScript) {
         let sdk = &self.sdk;
-        let folder_editor: Arc<ClientFolderEditor> = sdk.folder_manager.folder_editor().await;
+        let folder_editor: Arc<FolderEditor> = sdk.folder_manager.folder_editor().await;
         let rev_manager = folder_editor.rev_manager();
         let cache = rev_manager.revision_cache().await;
 
diff --git a/frontend/rust-lib/flowy-grid/src/event_handler.rs b/frontend/rust-lib/flowy-grid/src/event_handler.rs
index 44123a45d9..cf5c095ee9 100644
--- a/frontend/rust-lib/flowy-grid/src/event_handler.rs
+++ b/frontend/rust-lib/flowy-grid/src/event_handler.rs
@@ -7,7 +7,7 @@ use flowy_grid_data_model::entities::*;
 use lib_dispatch::prelude::{data_result, AppData, Data, DataResult};
 use std::sync::Arc;
 
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn get_grid_data_handler(
     data: Data<GridId>,
     manager: AppData<Arc<GridManager>>,
@@ -34,7 +34,7 @@ pub(crate) async fn get_grid_blocks_handler(
     data_result(repeated_grid_block)
 }
 
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn get_fields_handler(
     data: Data<QueryFieldPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -47,7 +47,7 @@ pub(crate) async fn get_fields_handler(
     data_result(repeated_field)
 }
 
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn update_field_handler(
     data: Data<FieldChangesetPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -58,7 +58,7 @@ pub(crate) async fn update_field_handler(
     Ok(())
 }
 
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn insert_field_handler(
     data: Data<InsertFieldPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -69,7 +69,7 @@ pub(crate) async fn insert_field_handler(
     Ok(())
 }
 
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn update_field_type_option_handler(
     data: Data<UpdateFieldTypeOptionPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -82,7 +82,7 @@ pub(crate) async fn update_field_type_option_handler(
     Ok(())
 }
 
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn delete_field_handler(
     data: Data<FieldIdentifierPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -93,7 +93,7 @@ pub(crate) async fn delete_field_handler(
     Ok(())
 }
 
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn switch_to_field_handler(
     data: Data<EditFieldPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -120,7 +120,7 @@ pub(crate) async fn switch_to_field_handler(
     data_result(data)
 }
 
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn duplicate_field_handler(
     data: Data<FieldIdentifierPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -132,7 +132,7 @@ pub(crate) async fn duplicate_field_handler(
 }
 
 /// Return the FieldTypeOptionData if the Field exists otherwise return record not found error.
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn get_field_type_option_data_handler(
     data: Data<EditFieldPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -154,7 +154,7 @@ pub(crate) async fn get_field_type_option_data_handler(
 }
 
 /// Create FieldMeta and save it. Return the FieldTypeOptionData.
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn create_field_type_option_data_handler(
     data: Data<EditFieldPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -171,7 +171,7 @@ pub(crate) async fn create_field_type_option_data_handler(
     })
 }
 
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn move_item_handler(
     data: Data<MoveItemPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -252,7 +252,7 @@ pub(crate) async fn get_cell_handler(
     }
 }
 
-#[tracing::instrument(level = "debug", skip_all, err)]
+#[tracing::instrument(level = "trace", skip_all, err)]
 pub(crate) async fn update_cell_handler(
     data: Data<CellChangeset>,
     manager: AppData<Arc<GridManager>>,
@@ -263,7 +263,7 @@ pub(crate) async fn update_cell_handler(
     Ok(())
 }
 
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn get_date_cell_data_handler(
     data: Data<CellIdentifierPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -284,7 +284,7 @@ pub(crate) async fn get_date_cell_data_handler(
     }
 }
 
-#[tracing::instrument(level = "debug", skip_all, err)]
+#[tracing::instrument(level = "trace", skip_all, err)]
 pub(crate) async fn new_select_option_handler(
     data: Data<CreateSelectOptionPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -301,7 +301,7 @@ pub(crate) async fn new_select_option_handler(
     }
 }
 
-#[tracing::instrument(level = "debug", skip_all, err)]
+#[tracing::instrument(level = "trace", skip_all, err)]
 pub(crate) async fn update_select_option_handler(
     data: Data<SelectOptionChangesetPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -341,7 +341,7 @@ pub(crate) async fn update_select_option_handler(
     Ok(())
 }
 
-#[tracing::instrument(level = "debug", skip(data, manager), err)]
+#[tracing::instrument(level = "trace", skip(data, manager), err)]
 pub(crate) async fn get_select_option_handler(
     data: Data<CellIdentifierPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -362,7 +362,7 @@ pub(crate) async fn get_select_option_handler(
     }
 }
 
-#[tracing::instrument(level = "debug", skip_all, err)]
+#[tracing::instrument(level = "trace", skip_all, err)]
 pub(crate) async fn update_select_option_cell_handler(
     data: Data<SelectOptionCellChangesetPayload>,
     manager: AppData<Arc<GridManager>>,
@@ -373,7 +373,7 @@ pub(crate) async fn update_select_option_cell_handler(
     Ok(())
 }
 
-#[tracing::instrument(level = "debug", skip_all, err)]
+#[tracing::instrument(level = "trace", skip_all, err)]
 pub(crate) async fn update_date_cell_handler(
     data: Data<DateChangesetPayload>,
     manager: AppData<Arc<GridManager>>,
diff --git a/frontend/rust-lib/flowy-grid/src/manager.rs b/frontend/rust-lib/flowy-grid/src/manager.rs
index 218dff8782..f8ea9e70ae 100644
--- a/frontend/rust-lib/flowy-grid/src/manager.rs
+++ b/frontend/rust-lib/flowy-grid/src/manager.rs
@@ -1,5 +1,5 @@
-use crate::services::grid_editor::ClientGridEditor;
-use crate::services::persistence::block_index::BlockIndexPersistence;
+use crate::services::grid_editor::GridMetaEditor;
+use crate::services::persistence::block_index::BlockIndexCache;
 use crate::services::persistence::kv::GridKVPersistence;
 use crate::services::persistence::GridDatabase;
 use bytes::Bytes;
@@ -20,9 +20,9 @@ pub trait GridUser: Send + Sync {
 }
 
 pub struct GridManager {
-    editor_map: Arc<GridEditorMap>,
+    editor_map: Arc<DashMap<String, Arc<GridMetaEditor>>>,
     grid_user: Arc<dyn GridUser>,
-    block_index_persistence: Arc<BlockIndexPersistence>,
+    block_index_cache: Arc<BlockIndexCache>,
     #[allow(dead_code)]
     kv_persistence: Arc<GridKVPersistence>,
 }
@@ -33,14 +33,14 @@ impl GridManager {
         _rev_web_socket: Arc<dyn RevisionWebSocket>,
         database: Arc<dyn GridDatabase>,
     ) -> Self {
-        let grid_editors = Arc::new(GridEditorMap::new());
+        let grid_editors = Arc::new(DashMap::new());
         let kv_persistence = Arc::new(GridKVPersistence::new(database.clone()));
-        let block_index_persistence = Arc::new(BlockIndexPersistence::new(database));
+        let block_index_persistence = Arc::new(BlockIndexCache::new(database));
         Self {
             editor_map: grid_editors,
             grid_user,
             kv_persistence,
-            block_index_persistence,
+            block_index_cache: block_index_persistence,
         }
     }
 
@@ -67,7 +67,7 @@ impl GridManager {
     }
 
     #[tracing::instrument(level = "debug", skip_all, fields(grid_id), err)]
-    pub async fn open_grid<T: AsRef<str>>(&self, grid_id: T) -> FlowyResult<Arc<ClientGridEditor>> {
+    pub async fn open_grid<T: AsRef<str>>(&self, grid_id: T) -> FlowyResult<Arc<GridMetaEditor>> {
         let grid_id = grid_id.as_ref();
         tracing::Span::current().record("grid_id", &grid_id);
         self.get_or_create_grid_editor(grid_id).await
@@ -90,23 +90,27 @@ impl GridManager {
     }
 
     // #[tracing::instrument(level = "debug", skip(self), err)]
-    pub fn get_grid_editor(&self, grid_id: &str) -> FlowyResult<Arc<ClientGridEditor>> {
+    pub fn get_grid_editor(&self, grid_id: &str) -> FlowyResult<Arc<GridMetaEditor>> {
         match self.editor_map.get(grid_id) {
             None => Err(FlowyError::internal().context("Should call open_grid function first")),
-            Some(editor) => Ok(editor),
+            Some(editor) => Ok(editor.clone()),
         }
     }
 
-    async fn get_or_create_grid_editor(&self, grid_id: &str) -> FlowyResult<Arc<ClientGridEditor>> {
+    async fn get_or_create_grid_editor(&self, grid_id: &str) -> FlowyResult<Arc<GridMetaEditor>> {
         match self.editor_map.get(grid_id) {
             None => {
                 tracing::trace!("Create grid editor with id: {}", grid_id);
                 let db_pool = self.grid_user.db_pool()?;
                 let editor = self.make_grid_editor(grid_id, db_pool).await?;
-                self.editor_map.insert(grid_id, &editor);
+
+                if self.editor_map.contains_key(grid_id) {
+                    tracing::warn!("Grid:{} already exists in cache", grid_id);
+                }
+                self.editor_map.insert(grid_id.to_string(), editor.clone());
                 Ok(editor)
             }
-            Some(editor) => Ok(editor),
+            Some(editor) => Ok(editor.clone()),
         }
     }
 
@@ -115,11 +119,10 @@ impl GridManager {
         &self,
         grid_id: &str,
         pool: Arc<ConnectionPool>,
-    ) -> Result<Arc<ClientGridEditor>, FlowyError> {
+    ) -> Result<Arc<GridMetaEditor>, FlowyError> {
         let user = self.grid_user.clone();
         let rev_manager = self.make_grid_rev_manager(grid_id, pool.clone())?;
-        let grid_editor =
-            ClientGridEditor::new(grid_id, user, rev_manager, self.block_index_persistence.clone()).await?;
+        let grid_editor = GridMetaEditor::new(grid_id, user, rev_manager, self.block_index_cache.clone()).await?;
         Ok(grid_editor)
     }
 
@@ -145,31 +148,6 @@ impl GridManager {
     }
 }
 
-pub struct GridEditorMap {
-    inner: DashMap<String, Arc<ClientGridEditor>>,
-}
-
-impl GridEditorMap {
-    fn new() -> Self {
-        Self { inner: DashMap::new() }
-    }
-
-    pub(crate) fn insert(&self, grid_id: &str, grid_editor: &Arc<ClientGridEditor>) {
-        if self.inner.contains_key(grid_id) {
-            tracing::warn!("Grid:{} already exists in cache", grid_id);
-        }
-        self.inner.insert(grid_id.to_string(), grid_editor.clone());
-    }
-
-    pub(crate) fn get(&self, grid_id: &str) -> Option<Arc<ClientGridEditor>> {
-        Some(self.inner.get(grid_id)?.clone())
-    }
-
-    pub(crate) fn remove(&self, grid_id: &str) {
-        self.inner.remove(grid_id);
-    }
-}
-
 pub async fn make_grid_view_data(
     user_id: &str,
     view_id: &str,
@@ -192,9 +170,7 @@ pub async fn make_grid_view_data(
 
     // Indexing the block's rows
     build_context.block_meta_data.rows.iter().for_each(|row| {
-        let _ = grid_manager
-            .block_index_persistence
-            .insert_or_update(&row.block_id, &row.id);
+        let _ = grid_manager.block_index_cache.insert(&row.block_id, &row.id);
     });
 
     // Create grid's block
diff --git a/frontend/rust-lib/flowy-grid/src/services/block_meta_editor.rs b/frontend/rust-lib/flowy-grid/src/services/block_meta_editor.rs
index ce7c5c8e8d..d1cb847b37 100644
--- a/frontend/rust-lib/flowy-grid/src/services/block_meta_editor.rs
+++ b/frontend/rust-lib/flowy-grid/src/services/block_meta_editor.rs
@@ -8,18 +8,17 @@ use flowy_sync::util::make_delta_from_revisions;
 use lib_infra::future::FutureResult;
 use lib_ot::core::PlainTextAttributes;
 use std::borrow::Cow;
-
 use std::sync::Arc;
 use tokio::sync::RwLock;
 
-pub struct ClientGridBlockMetaEditor {
+pub struct GridBlockMetaEditor {
     user_id: String,
     pub block_id: String,
     pad: Arc<RwLock<GridBlockMetaPad>>,
     rev_manager: Arc<RevisionManager>,
 }
 
-impl ClientGridBlockMetaEditor {
+impl GridBlockMetaEditor {
     pub async fn new(
         user_id: &str,
         token: &str,
diff --git a/frontend/rust-lib/flowy-grid/src/services/block_meta_manager.rs b/frontend/rust-lib/flowy-grid/src/services/block_meta_manager.rs
index 229afe75a2..6ce36488c2 100644
--- a/frontend/rust-lib/flowy-grid/src/services/block_meta_manager.rs
+++ b/frontend/rust-lib/flowy-grid/src/services/block_meta_manager.rs
@@ -1,7 +1,7 @@
 use crate::dart_notification::{send_dart_notification, GridNotification};
 use crate::manager::GridUser;
-use crate::services::block_meta_editor::ClientGridBlockMetaEditor;
-use crate::services::persistence::block_index::BlockIndexPersistence;
+use crate::services::block_meta_editor::GridBlockMetaEditor;
+use crate::services::persistence::block_index::BlockIndexCache;
 use crate::services::row::{group_row_orders, GridBlockSnapshot};
 use dashmap::DashMap;
 use flowy_error::FlowyResult;
@@ -15,20 +15,20 @@ use std::borrow::Cow;
 use std::collections::HashMap;
 use std::sync::Arc;
 
-pub(crate) struct GridBlockMetaEditorManager {
+type BlockId = String;
+pub(crate) struct GridBlockManager {
     grid_id: String,
     user: Arc<dyn GridUser>,
-    // Key: block_id
-    editor_map: DashMap<String, Arc<ClientGridBlockMetaEditor>>,
-    persistence: Arc<BlockIndexPersistence>,
+    persistence: Arc<BlockIndexCache>,
+    block_editor_map: DashMap<BlockId, Arc<GridBlockMetaEditor>>,
 }
 
-impl GridBlockMetaEditorManager {
+impl GridBlockManager {
     pub(crate) async fn new(
         grid_id: &str,
         user: &Arc<dyn GridUser>,
         blocks: Vec<GridBlockMeta>,
-        persistence: Arc<BlockIndexPersistence>,
+        persistence: Arc<BlockIndexCache>,
     ) -> FlowyResult<Self> {
         let editor_map = make_block_meta_editor_map(user, blocks).await?;
         let user = user.clone();
@@ -36,27 +36,27 @@ impl GridBlockMetaEditorManager {
         let manager = Self {
             grid_id,
             user,
-            editor_map,
+            block_editor_map: editor_map,
             persistence,
         };
         Ok(manager)
     }
 
     // #[tracing::instrument(level = "trace", skip(self))]
-    pub(crate) async fn get_editor(&self, block_id: &str) -> FlowyResult<Arc<ClientGridBlockMetaEditor>> {
+    pub(crate) async fn get_editor(&self, block_id: &str) -> FlowyResult<Arc<GridBlockMetaEditor>> {
         debug_assert!(!block_id.is_empty());
-        match self.editor_map.get(block_id) {
+        match self.block_editor_map.get(block_id) {
             None => {
                 tracing::error!("The is a fatal error, block is not exist");
                 let editor = Arc::new(make_block_meta_editor(&self.user, block_id).await?);
-                self.editor_map.insert(block_id.to_owned(), editor.clone());
+                self.block_editor_map.insert(block_id.to_owned(), editor.clone());
                 Ok(editor)
             }
             Some(editor) => Ok(editor.clone()),
         }
     }
 
-    async fn get_editor_from_row_id(&self, row_id: &str) -> FlowyResult<Arc<ClientGridBlockMetaEditor>> {
+    async fn get_editor_from_row_id(&self, row_id: &str) -> FlowyResult<Arc<GridBlockMetaEditor>> {
         let block_id = self.persistence.get_block_id(row_id)?;
         Ok(self.get_editor(&block_id).await?)
     }
@@ -67,7 +67,7 @@ impl GridBlockMetaEditorManager {
         row_meta: RowMeta,
         start_row_id: Option<String>,
     ) -> FlowyResult<i32> {
-        let _ = self.persistence.insert_or_update(&row_meta.block_id, &row_meta.id)?;
+        let _ = self.persistence.insert(&row_meta.block_id, &row_meta.id)?;
         let editor = self.get_editor(&row_meta.block_id).await?;
 
         let mut index_row_order = IndexRowOrder::from(&row_meta);
@@ -90,7 +90,7 @@ impl GridBlockMetaEditorManager {
             let editor = self.get_editor(&block_id).await?;
             let mut row_count = 0;
             for row in row_metas {
-                let _ = self.persistence.insert_or_update(&row.block_id, &row.id)?;
+                let _ = self.persistence.insert(&row.block_id, &row.id)?;
                 let mut row_order = IndexRowOrder::from(&row);
                 let (count, index) = editor.create_row(row, None).await?;
                 row_count = count;
@@ -256,7 +256,7 @@ impl GridBlockMetaEditorManager {
 async fn make_block_meta_editor_map(
     user: &Arc<dyn GridUser>,
     blocks: Vec<GridBlockMeta>,
-) -> FlowyResult<DashMap<String, Arc<ClientGridBlockMetaEditor>>> {
+) -> FlowyResult<DashMap<String, Arc<GridBlockMetaEditor>>> {
     let editor_map = DashMap::new();
     for block in blocks {
         let editor = make_block_meta_editor(user, &block.block_id).await?;
@@ -266,7 +266,7 @@ async fn make_block_meta_editor_map(
     Ok(editor_map)
 }
 
-async fn make_block_meta_editor(user: &Arc<dyn GridUser>, block_id: &str) -> FlowyResult<ClientGridBlockMetaEditor> {
+async fn make_block_meta_editor(user: &Arc<dyn GridUser>, block_id: &str) -> FlowyResult<GridBlockMetaEditor> {
     let token = user.token()?;
     let user_id = user.user_id()?;
     let pool = user.db_pool()?;
@@ -274,5 +274,5 @@ async fn make_block_meta_editor(user: &Arc<dyn GridUser>, block_id: &str) -> Flo
     let disk_cache = Arc::new(SQLiteGridBlockMetaRevisionPersistence::new(&user_id, pool));
     let rev_persistence = Arc::new(RevisionPersistence::new(&user_id, block_id, disk_cache));
     let rev_manager = RevisionManager::new(&user_id, block_id, rev_persistence);
-    ClientGridBlockMetaEditor::new(&user_id, &token, block_id, rev_manager).await
+    GridBlockMetaEditor::new(&user_id, &token, block_id, rev_manager).await
 }
diff --git a/frontend/rust-lib/flowy-grid/src/services/grid_editor.rs b/frontend/rust-lib/flowy-grid/src/services/grid_editor.rs
index c161e191c4..e4cee15a6e 100644
--- a/frontend/rust-lib/flowy-grid/src/services/grid_editor.rs
+++ b/frontend/rust-lib/flowy-grid/src/services/grid_editor.rs
@@ -1,9 +1,9 @@
 use crate::dart_notification::{send_dart_notification, GridNotification};
 use crate::entities::CellIdentifier;
 use crate::manager::GridUser;
-use crate::services::block_meta_manager::GridBlockMetaEditorManager;
+use crate::services::block_meta_manager::GridBlockManager;
 use crate::services::field::{default_type_option_builder_from_type, type_option_builder_from_bytes, FieldBuilder};
-use crate::services::persistence::block_index::BlockIndexPersistence;
+use crate::services::persistence::block_index::BlockIndexCache;
 use crate::services::row::*;
 use bytes::Bytes;
 use flowy_error::{ErrorCode, FlowyError, FlowyResult};
@@ -19,20 +19,26 @@ use std::collections::HashMap;
 use std::sync::Arc;
 use tokio::sync::RwLock;
 
-pub struct ClientGridEditor {
+pub struct GridMetaEditor {
     grid_id: String,
     user: Arc<dyn GridUser>,
     grid_pad: Arc<RwLock<GridMetaPad>>,
     rev_manager: Arc<RevisionManager>,
-    block_meta_manager: Arc<GridBlockMetaEditorManager>,
+    block_manager: Arc<GridBlockManager>,
 }
 
-impl ClientGridEditor {
+impl Drop for GridMetaEditor {
+    fn drop(&mut self) {
+        tracing::trace!("Drop GridMetaEditor");
+    }
+}
+
+impl GridMetaEditor {
     pub async fn new(
         grid_id: &str,
         user: Arc<dyn GridUser>,
         mut rev_manager: RevisionManager,
-        persistence: Arc<BlockIndexPersistence>,
+        persistence: Arc<BlockIndexCache>,
     ) -> FlowyResult<Arc<Self>> {
         let token = user.token()?;
         let cloud = Arc::new(GridRevisionCloudService { token });
@@ -41,13 +47,13 @@ impl ClientGridEditor {
         let grid_pad = Arc::new(RwLock::new(grid_pad));
         let blocks = grid_pad.read().await.get_block_metas();
 
-        let block_meta_manager = Arc::new(GridBlockMetaEditorManager::new(grid_id, &user, blocks, persistence).await?);
+        let block_meta_manager = Arc::new(GridBlockManager::new(grid_id, &user, blocks, persistence).await?);
         Ok(Arc::new(Self {
             grid_id: grid_id.to_owned(),
             user,
             grid_pad,
             rev_manager,
-            block_meta_manager,
+            block_manager: block_meta_manager,
         }))
     }
 
@@ -254,10 +260,7 @@ impl ClientGridEditor {
         let row_order = RowOrder::from(&row_meta);
 
         // insert the row
-        let row_count = self
-            .block_meta_manager
-            .create_row(&block_id, row_meta, start_row_id)
-            .await?;
+        let row_count = self.block_manager.create_row(&block_id, row_meta, start_row_id).await?;
 
         // update block row count
         let changeset = GridBlockMetaChangeset::from_row_count(&block_id, row_count);
@@ -277,7 +280,7 @@ impl ClientGridEditor {
                 .or_insert_with(Vec::new)
                 .push(row_meta);
         }
-        let changesets = self.block_meta_manager.insert_row(rows_by_block_id).await?;
+        let changesets = self.block_manager.insert_row(rows_by_block_id).await?;
         for changeset in changesets {
             let _ = self.update_block(changeset).await?;
         }
@@ -286,7 +289,7 @@ impl ClientGridEditor {
 
     pub async fn update_row(&self, changeset: RowMetaChangeset) -> FlowyResult<()> {
         let field_metas = self.get_field_metas::<FieldOrder>(None).await?;
-        self.block_meta_manager
+        self.block_manager
             .update_row(changeset, |row_meta| make_row_from_row_meta(&field_metas, row_meta))
             .await
     }
@@ -309,7 +312,7 @@ impl ClientGridEditor {
     }
 
     pub async fn get_row(&self, row_id: &str) -> FlowyResult<Option<Row>> {
-        match self.block_meta_manager.get_row_meta(row_id).await? {
+        match self.block_manager.get_row_meta(row_id).await? {
             None => Ok(None),
             Some(row_meta) => {
                 let field_metas = self.get_field_metas::<FieldOrder>(None).await?;
@@ -321,7 +324,7 @@ impl ClientGridEditor {
         }
     }
     pub async fn delete_row(&self, row_id: &str) -> FlowyResult<()> {
-        let _ = self.block_meta_manager.delete_row(row_id).await?;
+        let _ = self.block_manager.delete_row(row_id).await?;
         Ok(())
     }
 
@@ -331,12 +334,12 @@ impl ClientGridEditor {
 
     pub async fn get_cell(&self, params: &CellIdentifier) -> Option<Cell> {
         let field_meta = self.get_field_meta(&params.field_id).await?;
-        let row_meta = self.block_meta_manager.get_row_meta(&params.row_id).await.ok()??;
+        let row_meta = self.block_manager.get_row_meta(&params.row_id).await.ok()??;
         make_cell(&params.field_id, &field_meta, &row_meta)
     }
 
     pub async fn get_cell_meta(&self, row_id: &str, field_id: &str) -> FlowyResult<Option<CellMeta>> {
-        let row_meta = self.block_meta_manager.get_row_meta(row_id).await?;
+        let row_meta = self.block_manager.get_row_meta(row_id).await?;
         match row_meta {
             None => Ok(None),
             Some(row_meta) => {
@@ -382,7 +385,7 @@ impl ClientGridEditor {
                     cell_content_changeset,
                 };
                 let _ = self
-                    .block_meta_manager
+                    .block_manager
                     .update_cell(cell_changeset, |row_meta| {
                         make_row_from_row_meta(&field_metas, row_meta)
                     })
@@ -403,7 +406,7 @@ impl ClientGridEditor {
     }
 
     pub async fn delete_rows(&self, row_orders: Vec<RowOrder>) -> FlowyResult<()> {
-        let changesets = self.block_meta_manager.delete_rows(row_orders).await?;
+        let changesets = self.block_manager.delete_rows(row_orders).await?;
         for changeset in changesets {
             let _ = self.update_block(changeset).await?;
         }
@@ -415,7 +418,7 @@ impl ClientGridEditor {
         let field_orders = pad_read_guard.get_field_orders();
         let mut block_orders = vec![];
         for block_order in pad_read_guard.get_block_metas() {
-            let row_orders = self.block_meta_manager.get_row_orders(&block_order.block_id).await?;
+            let row_orders = self.block_manager.get_row_orders(&block_order.block_id).await?;
             let block_order = GridBlockOrder {
                 block_id: block_order.block_id,
                 row_orders,
@@ -442,7 +445,7 @@ impl ClientGridEditor {
                 .collect::<Vec<String>>(),
             Some(block_ids) => block_ids,
         };
-        let snapshots = self.block_meta_manager.make_block_snapshots(block_ids).await?;
+        let snapshots = self.block_manager.make_block_snapshots(block_ids).await?;
         Ok(snapshots)
     }
 
@@ -476,10 +479,7 @@ impl ClientGridEditor {
     }
 
     pub async fn move_row(&self, row_id: &str, from: i32, to: i32) -> FlowyResult<()> {
-        let _ = self
-            .block_meta_manager
-            .move_row(row_id, from as usize, to as usize)
-            .await?;
+        let _ = self.block_manager.move_row(row_id, from as usize, to as usize).await?;
         Ok(())
     }
 
@@ -565,7 +565,7 @@ impl ClientGridEditor {
 }
 
 #[cfg(feature = "flowy_unit_test")]
-impl ClientGridEditor {
+impl GridMetaEditor {
     pub fn rev_manager(&self) -> Arc<RevisionManager> {
         self.rev_manager.clone()
     }
diff --git a/frontend/rust-lib/flowy-grid/src/services/persistence/block_index.rs b/frontend/rust-lib/flowy-grid/src/services/persistence/block_index.rs
index df75ec629c..c62dc502ad 100644
--- a/frontend/rust-lib/flowy-grid/src/services/persistence/block_index.rs
+++ b/frontend/rust-lib/flowy-grid/src/services/persistence/block_index.rs
@@ -7,11 +7,11 @@ use flowy_database::{
 use flowy_error::FlowyResult;
 use std::sync::Arc;
 
-pub struct BlockIndexPersistence {
+pub struct BlockIndexCache {
     database: Arc<dyn GridDatabase>,
 }
 
-impl BlockIndexPersistence {
+impl BlockIndexCache {
     pub fn new(database: Arc<dyn GridDatabase>) -> Self {
         Self { database }
     }
@@ -26,7 +26,7 @@ impl BlockIndexPersistence {
         Ok(block_id)
     }
 
-    pub fn insert_or_update(&self, block_id: &str, row_id: &str) -> FlowyResult<()> {
+    pub fn insert(&self, block_id: &str, row_id: &str) -> FlowyResult<()> {
         let conn = self.database.db_connection()?;
         let item = IndexItem {
             row_id: row_id.to_string(),
diff --git a/frontend/rust-lib/flowy-grid/tests/grid/script.rs b/frontend/rust-lib/flowy-grid/tests/grid/script.rs
index 611ee937e2..49b6ee7c90 100644
--- a/frontend/rust-lib/flowy-grid/tests/grid/script.rs
+++ b/frontend/rust-lib/flowy-grid/tests/grid/script.rs
@@ -1,6 +1,6 @@
 use bytes::Bytes;
 use flowy_grid::services::field::*;
-use flowy_grid::services::grid_editor::{ClientGridEditor, GridPadBuilder};
+use flowy_grid::services::grid_editor::{GridMetaEditor, GridPadBuilder};
 use flowy_grid::services::row::CreateRowMetaPayload;
 use flowy_grid_data_model::entities::{
     BuildGridContext, CellChangeset, Field, FieldChangesetParams, FieldMeta, FieldOrder, FieldType, GridBlockMeta,
@@ -72,7 +72,7 @@ pub enum EditorScript {
 pub struct GridEditorTest {
     pub sdk: FlowySDKTest,
     pub grid_id: String,
-    pub editor: Arc<ClientGridEditor>,
+    pub editor: Arc<GridMetaEditor>,
     pub field_metas: Vec<FieldMeta>,
     pub grid_blocks: Vec<GridBlockMeta>,
     pub row_metas: Vec<Arc<RowMeta>>,
@@ -239,7 +239,7 @@ impl GridEditorTest {
     }
 }
 
-async fn get_row_metas(editor: &Arc<ClientGridEditor>) -> Vec<Arc<RowMeta>> {
+async fn get_row_metas(editor: &Arc<GridMetaEditor>) -> Vec<Arc<RowMeta>> {
     editor
         .grid_block_snapshots(None)
         .await
diff --git a/frontend/rust-lib/flowy-text-block/src/editor.rs b/frontend/rust-lib/flowy-text-block/src/editor.rs
index d43fc24f1c..c1e50536a5 100644
--- a/frontend/rust-lib/flowy-text-block/src/editor.rs
+++ b/frontend/rust-lib/flowy-text-block/src/editor.rs
@@ -21,7 +21,7 @@ use lib_ws::WSConnectState;
 use std::sync::Arc;
 use tokio::sync::{mpsc, oneshot};
 
-pub struct ClientTextBlockEditor {
+pub struct TextBlockEditor {
     pub doc_id: String,
     #[allow(dead_code)]
     rev_manager: Arc<RevisionManager>,
@@ -30,7 +30,7 @@ pub struct ClientTextBlockEditor {
     edit_cmd_tx: EditorCommandSender,
 }
 
-impl ClientTextBlockEditor {
+impl TextBlockEditor {
     #[allow(unused_variables)]
     pub(crate) async fn new(
         doc_id: &str,
@@ -185,7 +185,7 @@ impl ClientTextBlockEditor {
     pub(crate) fn receive_ws_state(&self, _state: &WSConnectState) {}
 }
 
-impl std::ops::Drop for ClientTextBlockEditor {
+impl std::ops::Drop for TextBlockEditor {
     fn drop(&mut self) {
         tracing::trace!("{} ClientBlockEditor was dropped", self.doc_id)
     }
@@ -204,7 +204,7 @@ fn spawn_edit_queue(
 }
 
 #[cfg(feature = "flowy_unit_test")]
-impl ClientTextBlockEditor {
+impl TextBlockEditor {
     pub async fn text_block_delta(&self) -> FlowyResult<RichTextDelta> {
         let (ret, rx) = oneshot::channel::<CollaborateResult<RichTextDelta>>();
         let msg = EditorCommand::ReadDelta { ret };
diff --git a/frontend/rust-lib/flowy-text-block/src/manager.rs b/frontend/rust-lib/flowy-text-block/src/manager.rs
index 8a34c6916d..9325fe6001 100644
--- a/frontend/rust-lib/flowy-text-block/src/manager.rs
+++ b/frontend/rust-lib/flowy-text-block/src/manager.rs
@@ -1,4 +1,4 @@
-use crate::{editor::ClientTextBlockEditor, errors::FlowyError, BlockCloudService};
+use crate::{editor::TextBlockEditor, errors::FlowyError, BlockCloudService};
 use bytes::Bytes;
 use dashmap::DashMap;
 use flowy_database::ConnectionPool;
@@ -47,8 +47,8 @@ impl TextBlockManager {
         Ok(())
     }
 
-    #[tracing::instrument(level = "debug", skip(self, block_id), fields(block_id), err)]
-    pub async fn open_block<T: AsRef<str>>(&self, block_id: T) -> Result<Arc<ClientTextBlockEditor>, FlowyError> {
+    #[tracing::instrument(level = "trace", skip(self, block_id), fields(block_id), err)]
+    pub async fn open_block<T: AsRef<str>>(&self, block_id: T) -> Result<Arc<TextBlockEditor>, FlowyError> {
         let block_id = block_id.as_ref();
         tracing::Span::current().record("block_id", &block_id);
         self.get_block_editor(block_id).await
@@ -108,7 +108,7 @@ impl TextBlockManager {
 }
 
 impl TextBlockManager {
-    async fn get_block_editor(&self, block_id: &str) -> FlowyResult<Arc<ClientTextBlockEditor>> {
+    async fn get_block_editor(&self, block_id: &str) -> FlowyResult<Arc<TextBlockEditor>> {
         match self.editor_map.get(block_id) {
             None => {
                 let db_pool = self.user.db_pool()?;
@@ -123,7 +123,7 @@ impl TextBlockManager {
         &self,
         block_id: &str,
         pool: Arc<ConnectionPool>,
-    ) -> Result<Arc<ClientTextBlockEditor>, FlowyError> {
+    ) -> Result<Arc<TextBlockEditor>, FlowyError> {
         let user = self.user.clone();
         let token = self.user.token()?;
         let rev_manager = self.make_rev_manager(block_id, pool.clone())?;
@@ -132,7 +132,7 @@ impl TextBlockManager {
             server: self.cloud_service.clone(),
         });
         let doc_editor =
-            ClientTextBlockEditor::new(block_id, user, rev_manager, self.rev_web_socket.clone(), cloud_service).await?;
+            TextBlockEditor::new(block_id, user, rev_manager, self.rev_web_socket.clone(), cloud_service).await?;
         self.editor_map.insert(block_id, &doc_editor);
         Ok(doc_editor)
     }
@@ -180,7 +180,7 @@ impl RevisionCloudService for TextBlockRevisionCloudService {
 }
 
 pub struct TextBlockEditorMap {
-    inner: DashMap<String, Arc<ClientTextBlockEditor>>,
+    inner: DashMap<String, Arc<TextBlockEditor>>,
 }
 
 impl TextBlockEditorMap {
@@ -188,14 +188,14 @@ impl TextBlockEditorMap {
         Self { inner: DashMap::new() }
     }
 
-    pub(crate) fn insert(&self, block_id: &str, doc: &Arc<ClientTextBlockEditor>) {
+    pub(crate) fn insert(&self, block_id: &str, doc: &Arc<TextBlockEditor>) {
         if self.inner.contains_key(block_id) {
             log::warn!("Doc:{} already exists in cache", block_id);
         }
         self.inner.insert(block_id.to_string(), doc.clone());
     }
 
-    pub(crate) fn get(&self, block_id: &str) -> Option<Arc<ClientTextBlockEditor>> {
+    pub(crate) fn get(&self, block_id: &str) -> Option<Arc<TextBlockEditor>> {
         Some(self.inner.get(block_id)?.clone())
     }
 
diff --git a/frontend/rust-lib/flowy-text-block/tests/document/script.rs b/frontend/rust-lib/flowy-text-block/tests/document/script.rs
index 5511896fc2..1722724c3f 100644
--- a/frontend/rust-lib/flowy-text-block/tests/document/script.rs
+++ b/frontend/rust-lib/flowy-text-block/tests/document/script.rs
@@ -1,6 +1,6 @@
 use flowy_revision::disk::RevisionState;
 use flowy_test::{helper::ViewTest, FlowySDKTest};
-use flowy_text_block::editor::ClientTextBlockEditor;
+use flowy_text_block::editor::TextBlockEditor;
 use flowy_text_block::TEXT_BLOCK_SYNC_INTERVAL_IN_MILLIS;
 use lib_ot::{core::Interval, rich_text::RichTextDelta};
 use std::sync::Arc;
@@ -19,7 +19,7 @@ pub enum EditorScript {
 
 pub struct TextBlockEditorTest {
     pub sdk: FlowySDKTest,
-    pub editor: Arc<ClientTextBlockEditor>,
+    pub editor: Arc<TextBlockEditor>,
 }
 
 impl TextBlockEditorTest {
diff --git a/shared-lib/flowy-sync/src/client_grid/grid_block_meta_pad.rs b/shared-lib/flowy-sync/src/client_grid/grid_block_meta_pad.rs
index 3f727faf59..3370719e68 100644
--- a/shared-lib/flowy-sync/src/client_grid/grid_block_meta_pad.rs
+++ b/shared-lib/flowy-sync/src/client_grid/grid_block_meta_pad.rs
@@ -175,7 +175,7 @@ impl GridBlockMetaPad {
                 match cal_diff::<PlainTextAttributes>(old, new) {
                     None => Ok(None),
                     Some(delta) => {
-                        tracing::debug!("[GridBlockMeta] Composing delta {}", delta.to_delta_str());
+                        tracing::trace!("[GridBlockMeta] Composing delta {}", delta.to_delta_str());
                         // tracing::debug!(
                         //     "[GridBlockMeta] current delta: {}",
                         //     self.delta.to_str().unwrap_or_else(|_| "".to_string())