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Expected one result (or null) to be returned by selectOne(), but found: 20
時間 2021-01-16
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mybatis
sql
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MyBatis
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今天項目報了標題上這個錯,花了不少時間解決,現在分享下過程,希望遇到類似問題的朋友能節省點時間。 根據錯誤提示的意思,是返回值的問題,於是檢查了幾遍mapper,確認sql語句無誤後,又檢查了dao中的返回值類型,也正確。 那麼問題來了,返回值類型正確,也不是resultmap,resulttype的問題,難不成是Mybatis哪裏配置出錯了?可是我明明之前都還正常。 百思不得姐的時候,找了大牛請
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