通过上面分析的EFCore里面ToTable的做法,我们知道,实际上是真的不可避免地需要有俩 Entity ,这样才可以设置它们分别映射到不同的数据表。然后,因为有了Lazy Loading,我们可以对 Client 这个主类,添加引用 ClientContactInfo 类的相应的几个属性。通过玩弄getter和setter的把戏。让EFCore的Lazy
用它们来实现 基于 EF Core的Entity Split 可行性分析 通过上面分析的EFCore里面ToTable的做法,我们知道,实际上是真的不可避免地需要有俩 Entity ,这样才可以设置它们分别映射到不同的数据表。然后,因为有了Lazy Loading,我们可以对 Client 这个主类,添加引用 ClientContactInfo 类的相应的几个属性。通过玩弄getter...
EF Core is pretty strict about nullable reference types.I wrote about this before in the context of migrations, but it also affects loading of data from the database. If you try to load a null value into a non-nullablestringproperty, aSqlNullValueExceptionwill be thrown: System.Data.SqlType...
如果你是Code First er,可以止步于此了。 如果你是处女座,或者 DB First er, 你会发现EFCore正向工程后的数据表,表结构很特别,且看着测试数据的结果,会感觉是一堵装饰墙。反正就是总觉得有说不出来的违和感。 你会想,有没有可能,让EFCore,用上和逻辑设计之间β角偏差最小的数据表呢? 如果你有上述的感觉和...
如果初学者从未接触过EF 6.x,我们知道EF 6.x默认启用了延迟加载,所以这似乎有点强人所难的意味,在EF Core 2.1对于是否启用延迟加载通过单独提供包的形式来供我们所需,二者相对而言,EF 6.x对于延迟加载的使用是不明确、含糊其辞的,而EF Core 2.1对于延迟加载是很具体、明确的,如此一来至少不会造成滥用的情况。
EF Core Lazy LoadingLazy loading of data is a pattern whereby the retrieval of data from the database is deferred until it is needed. This sounds like a good thing, and in some scenarios, this can help to improve the performance of an application. In other scenarios, it can degrade the...
In this article, we will learn about the loading strategies we can employ in EF Core. These strategies, namely Lazy Loading and Eager Loading control how data is fetched from the database. We will also delve into performance impacts and considerations for choosing one over the other. ...
Hi, In my unit tests, I run 20 parallel calls to my app to check that everything works as expected when there are concurrent requests. Lately I have used LazyLoading ( Microsoft.EntityFrameworkCore.Proxies ), and I started having this ex...
As explained in my first thread, in EF Core lazy loading is off by default. You have to add configuration to enable lazy loading in EF Core. This information is openly and clearly published in the linked documentation from my first post. ...
I enabled Lazy Loading with proxies and the documentation here says "Lazy loading means that the related data is transparently loaded from the database when the navigation property is accessed." I was struggling with a navigation propert...