wk1563396689
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怎么去理解 JPA 中的 exists?

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  •   wk1563396689 · Jul 29, 2019 · 2013 views
    This topic created in 2600 days ago, the information mentioned may be changed or developed.

    这是介绍 v1.1 时候的新特性的一句话,Support for the exists projection in repository query derivation.那针对新手而言,该怎么理解 exists,是 JPA 提供一些内置的方法,比如说 findById(),还是其他的呢,不是很懂

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