Expected one result (or null) to be returned by selectOne(), but found: 2
时间: 2023-10-23 10:06:01 浏览: 47
这个报错意味着在使用selectOne()方法时,期望返回一个结果(或null),但实际上返回了多个结果。根据引用和引用,这个问题通常是由于数据库中存在多条匹配的数据导致的。
解决这个问题的方法有几种:
1. 将selectOne()方法替换为selectList()方法,这样可以返回多个结果。提到了一种可能的原因是没有对主键进行查询。请确保你的查询语句中包含了正确的主键条件。
总结起来,解决这个问题的方法是要么返回多个结果,要么修改查询条件,确保只返回一个结果。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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