删除校验

service/book/book.go

@@ -471,7 +471,15 @@ func (s *BookServ) GetRecordList(borrowStatus, caseid, customerName, customerPho
 }
 
 func (s *BookServ) DeleteBook(bookId string) error {
-	err := s.dao.DeleteBook(bookId)
+	book, err := s.dao.GetBookById(bookId)
+	if err != nil {
+		utils.LogError("删除失败: " + err.Error())
+		return errors.New("删除失败")
+	}
+	if book.LeftNum != book.InStock {
+		return errors.New("当前图书已有借出/预约，不能删除")
+	}
+	err = s.dao.DeleteBook(bookId)
 	if err != nil {
 		utils.LogError("删除失败: " + err.Error())
 		return errors.New("删除失败")