下一次我们会来分析关闭Lazy Loading的情况下,如何显示加载相关实体,即Explicit Loading。 上一回我们在《Entity Framework加载相关实体——Lazy Loading》分析了Lazy Loading,这一回我们来分析一下在关闭Lazy Loading的情况下,如果显式加载实体。 数据库我们依旧使用Lazy Loading中使用的数据库。之前我们分析过来,当Lazy ...
then when loading an entity, EF Core will automatically set the navigation properties of the newly-loaded entitiy to refer to any entities already loaded, and set the navigation properties of the already-loaded entities to refer to the
In this post, we will be discussing about Eager Loading, Lazy Loading and Explicit Loading in an Entity Framework. All three terms -- Eager Loading, Lazy Loading and Explicit Loading -- refer to the process of loading the related entities. They define when to load the related entities or...
Entity Framework提供了三种加载相关实体的方法:Lazy Loading,Eager Loading和Explicit Loading。首先我们先来看一下MSDN对三种加载实体方法的定义。 Lazy Loading:对于这种类型的加载,在您访问导航属性时,会从数据源自动加载相关实体。 使用此加载类型时,请注意,如果实体尚未在 ObjectContext ... ...
Entity Framework加载相关实体——Lazy Loading Entity Framework提供了三种加载相关实体的方法:Lazy Loading,Eager Loading和Explicit Loading。首先我们先来看一下MSDN对三种加载实体方法的定义。 Lazy Loading:对于这种类型的加载,在您访问导航属性时,会从数据源自动加载相关实体。 使用此加载类型时,请注意,如果实体尚未...
Yes, lazy loading is enabled in the Entity Framework ORM too, it is on by default in Entity Framework, so if you want to enable lazy loading in Entity Framework, you don't need to do anything. Haha.. And the opposite of lazy loading is eager loading that we will see in this ...
Fortunately, thanks to EF team’s effort again, Lazy Loading becomes the default option in EF4, as we already have in LINQ to SQL. Of course, we can still use Eager Loading and Explicit Loading as our wish. Let’s see how they work in EF4. We first create an EDM with two ...
For Lazy Loading, here’s the query generated to load theUserdata: selectuser0_.USER_IDasUSER_ID1_0_, ...fromUSERuser0_ However, in eager loading, we saw a join made withUSER_ORDER: selectorderdetai0_.USER_IDasUSER_ID4_0_0_, orderdetai0_.ORDER_IDasORDER_ID1_1_0_, orderdetai...
1. Eager Loading or Defining Query Paths with Include 2. Lazy Loading 3. Explicit Loading and more How to choose loading pattern? Use Eager Loadingwhen the data in related entities is too costly to be loaded at the cost of the queries being made to the database. In other words, fetch ...
This can be improved with strict coding practices. Programmers can still use explicit methods to do the same with lazy loading; but my experience is that when that convenience is there it is abused and it is very hard to trace because it looks like a very normal property call. If lazy ...