entity-framework - 减少 EF 中的大量包含

Question

有什么方法可以缩短这个包含语句？

var query = Context.Businesses
 .Include(b => b.Categories)
 .Include(b => b.Branches.Select(br => br.Address))
 .Include(b => b.Branches.Select(br => br.BranchType))
 .Include(b => b.Branches.Select(br => br.CustomFields))
 .Include(b => b.Branches.Select(br => br.Phones))
 .Include(b => b.Branches.Select(br => br.OpeningTimes.Select(ot => ot.WorkingPeriods)));

我考虑过使用 SPROC，但我不确定它如何知道返回的内容。

那么有没有一种非硬编码的方法可以比它更短呢？也许是一个处理 ? 的所有属性的外部 lambda Branch？

Answer 1

你可以做一些类似于这个问题的答案的事情。所以在你的情况下，做一个这样的扩展方法：

public static class DataContextExtensions
{
   public static IQueryable<Business> BusinessesComplete(this DataContext context){
         return context.Businesses
             .Include(b => b.Categories)
             .Include(b => b.Branches.Select(br => br.Address))
             .Include(b => b.Branches.Select(br => br.BranchType))
             .Include(b => b.Branches.Select(br => br.CustomFields))
             .Include(b => b.Branches.Select(br => br.Phones))
             .Include(b => b.Branches.Select(br => br.OpeningTimes.Select(ot => ot.WorkingPeriods)));
     }
}

然后像这样使用它：

Business business = context.BusinessesComplete().Where(b => ...etc);