diff --git a/src-tauri/src/services/cache/repo.rs b/src-tauri/src/services/cache/repo.rs
index 341f78f..1cbef0f 100644
--- a/src-tauri/src/services/cache/repo.rs
+++ b/src-tauri/src/services/cache/repo.rs
@@ -45,7 +45,13 @@ pub trait CacheRepo: Send + Sync + 'static {
 }
 
 pub struct CacheRepoImpl {
-    pub db: DatabaseConnection,
+    db: DatabaseConnection,
+}
+
+impl CacheRepoImpl {
+    pub fn new(db: DatabaseConnection) -> Self {
+        Self { db }
+    }
 }
 
 #[async_trait::async_trait]
diff --git a/src-tauri/src/services/cache/service.rs b/src-tauri/src/services/cache/service.rs
index 8039a86..48123c1 100644
--- a/src-tauri/src/services/cache/service.rs
+++ b/src-tauri/src/services/cache/service.rs
@@ -53,7 +53,7 @@ impl CacheServiceImpl<super::repo::CacheRepoImpl> {
     pub fn new(db: DatabaseConnection) -> Self {
         Self {
             db: db.clone(),
-            repo: Arc::new(super::repo::CacheRepoImpl { db }),
+            repo: Arc::new(super::repo::CacheRepoImpl::new(db)),
         }
     }
 }
diff --git a/src-tauri/src/services/transaction/category/repo.rs b/src-tauri/src/services/transaction/category/repo.rs
index 3f8cdcd..d0a79f9 100644
--- a/src-tauri/src/services/transaction/category/repo.rs
+++ b/src-tauri/src/services/transaction/category/repo.rs
@@ -2,8 +2,8 @@ use std::sync::Arc;
 
 use crate::{
     db::{
-        entities::category::{ActiveModel as CategoryActiveModel, Entity as CategoryEntity},
         Db,
+        entities::category::{ActiveModel as CategoryActiveModel, Entity as CategoryEntity},
     },
     services::transaction::category::{
         Category, CategoryServiceError, CategoryServiceResult, CategoryWithParent,
@@ -22,7 +22,7 @@ pub trait CategoryRepoService: Send + Sync + 'static {
     async fn get_category(&self, id: i64) -> Result<Option<CategoryWithParent>>;
     async fn create_category(&self, request: CreateCategoryRequest) -> Result<i64>;
     async fn create_category_with_tx(&self, request: CreateCategoryRequest, tx: &Db)
-        -> Result<i64>;
+    -> Result<i64>;
     async fn update_category(&self, id: i64, request: UpdateCategoryRequest) -> Result<()>;
     async fn update_category_with_tx(
         &self,
@@ -35,7 +35,13 @@ pub trait CategoryRepoService: Send + Sync + 'static {
 
 #[derive(Clone)]
 pub struct CategoryRepoServiceImpl {
-    pub db: DatabaseConnection,
+    db: DatabaseConnection,
+}
+
+impl CategoryRepoServiceImpl {
+    pub fn new(db: DatabaseConnection) -> Self {
+        Self { db }
+    }
 }
 
 struct CategorySelfRefLink;
diff --git a/src-tauri/src/services/transaction/category/service.rs b/src-tauri/src/services/transaction/category/service.rs
index 1081894..e38675e 100644
--- a/src-tauri/src/services/transaction/category/service.rs
+++ b/src-tauri/src/services/transaction/category/service.rs
@@ -6,8 +6,8 @@ use thiserror::Error;
 use crate::{
     db::{Db, DbServiceError},
     services::transaction::category::{
-        repo::{CategoryRepoService, CategoryRepoServiceImpl},
         Category, CategoryWithParent, CreateCategoryRequest, UpdateCategoryRequest,
+        repo::{CategoryRepoService, CategoryRepoServiceImpl},
     },
 };
 
@@ -39,7 +39,7 @@ pub trait CategoryService: Send + Sync + 'static {
     async fn get_category(&self, id: i64) -> Result<Option<CategoryWithParent>>;
     async fn create_category(&self, request: CreateCategoryRequest) -> Result<i64>;
     async fn create_category_with_tx(&self, request: CreateCategoryRequest, tx: &Db)
-        -> Result<i64>;
+    -> Result<i64>;
     async fn update_category(&self, id: i64, request: UpdateCategoryRequest) -> Result<()>;
     async fn update_category_with_tx(
         &self,
@@ -62,7 +62,7 @@ impl CategoryServiceImpl<CategoryRepoServiceImpl> {
     pub fn new(db: DatabaseConnection) -> Self {
         Self {
             db: db.clone(),
-            category_repo: Arc::new(CategoryRepoServiceImpl { db }),
+            category_repo: Arc::new(CategoryRepoServiceImpl::new(db)),
         }
     }
 }
diff --git a/src-tauri/src/services/transaction/tag/repo.rs b/src-tauri/src/services/transaction/tag/repo.rs
index 178aa2b..d7160aa 100644
--- a/src-tauri/src/services/transaction/tag/repo.rs
+++ b/src-tauri/src/services/transaction/tag/repo.rs
@@ -1,5 +1,6 @@
 use crate::{
     db::{
+        Db,
         entities::{
             tag::{ActiveModel as TagActiveModel, Entity as TagEntity},
             transaction_tag::{
@@ -7,7 +8,6 @@ use crate::{
                 Entity as TransactionTagEntity,
             },
         },
-        Db,
     },
     services::transaction::tag::{
         CreateTagRequest, Tag, TagServiceError, TagServiceResult, UpdateTagRequest,
@@ -45,7 +45,13 @@ pub trait TagRepoService: Send + Sync + 'static {
 
 #[derive(Clone)]
 pub struct TagRepoServiceImpl {
-    pub db: DatabaseConnection,
+    db: DatabaseConnection,
+}
+
+impl TagRepoServiceImpl {
+    pub fn new(db: DatabaseConnection) -> Self {
+        Self { db }
+    }
 }
 
 #[async_trait::async_trait]
diff --git a/src-tauri/src/services/transaction/tag/service.rs b/src-tauri/src/services/transaction/tag/service.rs
index b00c743..37d04a0 100644
--- a/src-tauri/src/services/transaction/tag/service.rs
+++ b/src-tauri/src/services/transaction/tag/service.rs
@@ -6,8 +6,8 @@ use thiserror::Error;
 use crate::{
     db::{Db, DbServiceError},
     services::transaction::tag::{
-        repo::{TagRepoService, TagRepoServiceImpl},
         CreateTagRequest, Tag, UpdateTagRequest,
+        repo::{TagRepoService, TagRepoServiceImpl},
     },
 };
 
@@ -67,7 +67,7 @@ impl TagServiceImpl<TagRepoServiceImpl> {
     pub fn new(db: DatabaseConnection) -> Self {
         Self {
             db: db.clone(),
-            tag_repo: Arc::new(TagRepoServiceImpl { db }),
+            tag_repo: Arc::new(TagRepoServiceImpl::new(db)),
         }
     }
 }