我用一个简单的网络应用程序,由Hibernate管理,有两门固定的用户和员额。 我同用户一样能够列出他尚未读到的职位。 我如何利用Hibernate落实这一功能?
增加一个用户实体,包括一个用户和一个邮局
<编码> 摘录 Post p where p not in ( selected up). 用户:用户 Id
我确信,与<条码>而不是相比,有一种更有利于业绩的问询,但你会获得这样的格言。
另一种选择是,向用户增加一个邮资,并给用户一个 la的类型,但我假定,收集工作可能变得庞大,而仅仅为了问询而增加协会对我来说似乎并不大。
Adding a separate entity for the join table will keep you from having a direct association from the User to the Post or vice versa. When the user reads a post, you add a record to the UserPost table. You could also embellish the entity with a date to store when they read the entry, or a count so you can keep track of their most popular posts or whatever.
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