mapper 中定义CrudRepository中没有的方法可以吗

我写的报这个

Caused by: org.springframework.beans.factory.BeanCreationException: 
    Error creating bean with name 'todoMapper' defined in io.gitee.n__n.mapper.TodoMapper defined in @EnableJdbcRepositories declared on MyBatisJdbcConfig: 
    Invocation of init method failed; nested exception is org.springframework.data.repository.query.QueryCreationException: Could not create query for public abstract java.lang.String io.gitee.n__n.mapper.TodoMapper.selectActionById()! 
   Reason: No property selectActionById found for type Todo!