流利的nhibernate自动截断字符串 [英] fluent nhibernate truncate string automatically

问题描述

有没有一个简单的方法来自动截断字符串使用流利的nHibernate映射。我宁愿不要解决这个setters或一个自定义类型，但在映射文件中的东西。

解决方案

如果我正确地理解了你的话，你想确保字符串持久化到数据库的长度不能超过指定长度。这听起来像是商业上的担忧，尽管可能属于领域模型或验证逻辑。

这个问题似乎已经被问及之前的解决方案一个自定义的nHibernate UserType。请记住，这不是一个自定义的实体类型或基类，这是一个nHibernate可以理解的自定义映射类型。
自动截断NHibernate / SQL Server中的字符串 如果自定义usertype解决方案不符合你的愿望，那么你可以实现一个自定义的拦截器，但我不认为有任何东西在nHibernate做这个out-of -THE盒。然而，这就是nHibernate的优点，它是非常可扩展的，并且为你的情况实现一个自定义用户类型并不难。

Is there an easy way to automatically truncate strings using fluent nHibernate mappings. I would prefer to not address this the setters or a custom type, but with something in the mapping files.

解决方案

If I understand you correctly you want to make sure strings persisted to the database are no longer than a specified length. This sounds like it could be a business concern though and probably does belong in the domain model or as validation logic.

This question appears to have been asked before and the solution was a custom nHibernate UserType. Keep in mind this isn't a custom entity type or base class, this is a custom mapping type that nHibernate can understand. Automatically truncating strings in NHibernate / SQL Server

If the custom usertype solution isn't to your liking then you could implement a custom interceptor, but I don't believe there is anything in nHibernate that does this "out-of-the-box". However, that is the beauty of nHibernate is that it is very extensible and implementing a custom user type for your situation is not difficult at all.

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