Expected one result (or null) to be returned by...

时间 2019-11-17

标签 expected result null returned 繁體版

原文原文链接

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2 spring

就是mapper的方法是返回一个对象，可是数据库查询是一个列表，因此报错。数据库

1. org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned
2. 解决:TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found:
3. Expected one result (or null) to be returned by selectOne(), but found: 2
4. BUG之Expected one result (or null) to be returned by selectOne(), but found: 4
5. MyBatis报错：Expected one result (or null) to be returned by selectOne(), but found: 2
6. TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2]
7. Expected one result (or null) to be returned by selectOne(), but found: 20
8. 解决 Expected one result (or null) to be returned by selectOne(), but found: 2
9. Could not set parameters for mapping 和Expected one result (or null) to be returned by selectOne(), b
10. 关于Expected one result (or null) to be returned by selectOne(), but found: 3。。。。异常
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1. org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned
2. 解决:TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found:
3. Expected one result (or null) to be returned by selectOne(), but found: 2
4. BUG之Expected one result (or null) to be returned by selectOne(), but found: 4
5. MyBatis报错：Expected one result (or null) to be returned by selectOne(), but found: 2
6. TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2]
7. Expected one result (or null) to be returned by selectOne(), but found: 20
8. 解决 Expected one result (or null) to be returned by selectOne(), but found: 2
9. Could not set parameters for mapping 和Expected one result (or null) to be returned by selectOne(), b
10. 关于Expected one result (or null) to be returned by selectOne(), but found: 3。。。。异常

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