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 Loading关闭时,执行以下代码是无法得到结果的,因为Player的信息并没有被加载。 1using(Te...
ActiveRecord默认是lazy loading的,而加上:include选项后可以指定eager loading一些字段 :include - specify second-order associations that should be eager loaded when the collection is loaded. 看例子: Post.find(:all, :include => :comments) # => SELECT ... FROM posts LEFT OUTER JOIN comments ON ....
In this article, we delved into Lazy Loading and Eager Loading. We learned how each strategy works and saw the scenarios in which each of them is useful. We also went over the best practices to consider when choosing one over another. Finally, the choice between Eager Loading and Lazy Load...
Lazy loading 中又使用Eager loading 如果在启用Lazy loading后又使用了Include方法来使用Eager loading,那么实际上是Eager loading在起作用,这样EF Core实体的导航属性不会再单独开启数据库连接去数据库查询数据,而是用sql语句的join预先在数据库中查询数据: 假设我们现在有Person实体里面有个Book导航属性,返回ICollection<...
In software development, efficient data retrieval is a critical aspect of creating high-performance applications. When working with databases, developers often face choices between loading strategies, two of the most common being eager loading and lazy loading. In the context of .NET Core, understandi...
Here’s a comparison between Lazy Loading and Eager Loading FeatureLazy LoadingEager Loading Definition Resources are loaded only when they are needed or requested. All resources are loaded upfront during the initial load. When Resources are Loaded Resources are loaded at the point of use (for ex...
Simplified code:Unlike lazy loading, eager loading avoids the need to explicitly find ways to defer the loading of resources. This approach therefore involves simpler and less complex code Data consistency:Eager loading ensures data consistency as all related data is fetched at once. This is useful...
System resource conservation– Lazy loading conserves both server and client resources, because only some of the images, JavaScript and other code actually needs to be rendered or executed. Lazy Loading vs. Eager Loading While lazy loading delays the initialization of a resource, eager loading initia...
Now, in this article, we will go one step further and discuss when a LINQ query gets executed. LINQ query is not executed when constructed but when enumerated. There are two types of query executions in LINQ, which are given below. Deferred or Lazy Loading Eager Loading....
your entity mapping. It specifies when your JPA implementation, e.g., Hibernate, fetches associated entities from the database. You can choose betweenEAGERandLAZYloading. The first one fetches an association immediately, and the other only when you use it. I explain both options in this ...