Expected one result (or null) to be returned by selectOne(), but found: 5
时间: 2023-10-23 08:03:35 浏览: 52
回答: 这个问题的报错信息“Expected one result (or null) to be returned by selectOne(), but found: 5”意味着期望selectOne()返回一个结果(或null),但实际上找到了5个结果。根据引用中的解决方案,有几种可能的解决方案可以尝试。第一种方案是将selectOne()替换为selectList(),这样就可以返回多个对象了。第二种方案是将多个对象封装到一个类中,然后使用selectOne()返回这个新的类对象。第三种方案是修改SQL语句,例如使用别名等方式来确保只返回一个结果。<em>1</em><em>2</em>
#### 引用[.reference_title]
- *1* [Expected one result (or null) to be returned by selectOne(), but found: 2的问题解决方法](https://blog.csdn.net/m0_54066656/article/details/124067673)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}} ] [.reference_item]
- *2* [Expected one result (or null) to be returned by selectOne(), but found: 3报错解决方案](https://blog.csdn.net/weixin_51821844/article/details/127818387)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}} ] [.reference_item]
[ .reference_list ]