diff --git a/app/src/main/java/io/legado/app/ui/main/bookshelf/BookshelfViewModel.kt b/app/src/main/java/io/legado/app/ui/main/bookshelf/BookshelfViewModel.kt
index 08938f6b3..c50e441b0 100644
--- a/app/src/main/java/io/legado/app/ui/main/bookshelf/BookshelfViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/main/bookshelf/BookshelfViewModel.kt
@@ -33,6 +33,10 @@ class BookshelfViewModel(application: Application) : BaseViewModel(application)
     }
 
     fun downloadAll() {
+        execute {
+            App.db.bookDao().allBooks.forEach { book ->
 
+            }
+        }
     }
 }